The Cybersecurity and Infrastructure Security Agency (CISA), the National Security Agency (NSA), and the Office of the Director of National Intelligence (ODNI) recently released a document entitled, “Securing the Software Supply Chain – Recommended Practices Guide for Developers.” I hoped the document might shed light on practical, perhaps even novel, ways for the private sector to increase systems resilience to supply chain attacks. The authors are respected authorities, and the topic is salient to the public.
Instead, the document’s guidance contains a mixture of impractical, confusing, confused, and even dangerous recommendations.
There is a collective ignis fatuus in the information security community that it is the “job” of an organization’s employees to prioritize security above all else. This fallacy holds us back from achieving better defense outcomes. Unfortunately, “Securing the Software Supply Chain” calcifies this falsehood.
Therefore, I have written this rebuttal in the form of ten objections:
- Slowing down software delivery does not help security, it hurts it
- There is an underlying paradox (the “Thinking Machine” paradox)
- Most enterprises have no chance of implementing this
- Most enterprises will not want to implement this
- Security vendor bolt-on solutions are overemphasized
- Relevant security and infrastructure innovation is omitted
- Inaccuracies about software delivery practices and basic terminology
- Confusing, contradictory messages from the authoring agencies
- Omission of second order effects and underlying causal factors
- Dangerous absolution of security vendors’ own software security
Objection #1: Slowing down software delivery does not help security, it hurts it
Empirical evidence from the enterprise software engineering world makes it clear that speed benefits not only business outcomes (like release velocity) but also security outcomes (like time to recovery, time to fix security issues). “Securing the Software Supply Chain” instead effectively recommends against speed, arguing for slowness and additional hurdles and frictions throughout the software delivery process.
The guidance is for a centralized1 security team to impose significant restrictions on software engineering activity, thereby enforcing security as the top priority. For instance, IDEs (and plug-ins) are treated as threats to be “preapproved, validated, and scanned for vulnerabilities before being incorporated onto any developer machine.”
Speed, and even reliability, are treated as justified casualties for security’s sake. Given the mission of intelligence agencies, chiefly national security, they rightly view security obstruction as worthwhile. Their goal is not to grow market share or their customer base or improve profit margins by shipping more software, faster. This means their perspective simply does not translate to the private sector, unless we, as a society, decide a corporation must serve national security rather than its shareholders.
The result from this guidance – if the recommendations were implemented by, say, the Fortune 500 – is that software struggles to get built. Software engineers would quit (and have quit over lesser inconveniences in the private sector). Whatever the enterprise’s budget, with these recommendations they will build software slowly, and it will be of poorer quality – which is a direct detriment to the goal of higher quality, more secure software.
Objection #2: There is an underlying paradox (the “Thinking Machine Paradox”)
There is a logical inconsistency – perhaps even a paradox – presented: developers cannot be trusted, but automation is discouraged in favor of manual processes run by humans. If there is paranoia about “unintended flaws” introduced by developers, then why give them more opportunity to introduce them by recommending manual processes?
If there is concern that their user credentials will beget malefaction and mistakes, then why discourage service accounts2, which are inherently decoupled from specific user identities? Without service accounts, if the human user leaves or is fired, then their credentials are still tied to whatever activity – which is a dangerous game to play.
The guide goes to great lengths to paint the picture of developer as an insider threat – whether purposefully malicious or “poorly trained”— but then explicitly espouses manual build and release processes. So, individual software engineers are simultaneously not to be trusted but also, they should be the ones to perform and approve software delivery activities?
Human brains are not great at executing tasks the same way every time. Computers are much better at that! And yet while the guide warns about the dangers of human mistakes, they want us to rely on those humans for repeatable tasks rather than automating them3.
Objection #3: Most enterprises have no chance of implementing this
Most enterprises have no chance of implementing the recommendations in “Securing the Software Supply Chain.” It is allegedly meant as a reference guide for developers, but it is really a reference guide for no one other than an intelligence agency with the same goals and resources as the NSA.
This is a criticism often made about Google: they propose advice that works for them and their titanic budget and pool of talent without considering the constraints and tradeoffs faced by “mere mortals.” CISA, the NSA, and the ODNI have fallen into a similar trap.
There are numerous recommendations that are impractical for enterprises, and not just the absurd one of disallowing internet access in “development”4 and “engineering”5 systems. For instance, if enterprises documented everything that a piece of software performs, it would be equivalent to writing it twice (and the documentation would inevitably differ from the source code); enterprises would likely be better off with no documentation at all and just reading the source code.
As another example, they also recommend that “Fuzzing should be performed on all software components during development.” If fuzzing all software components during development was a strict requirement, enterprises might never ship software again6. They also recommend “Using a testing approach…to ensure that repaired vulnerabilities are truly fixed against all possible compromises.” If enterprise software engineering teams knew the graph of possible compromises, why would we need all of this guidance?
Objection #4: Most enterprises will not want to implement this
Intelligence agencies, whose mission is national security, have no choice but to implement a paradigm as described because the alternative is simply not developing software. Enterprises in the private sector, whose mission is making money, do not face the same constraint; the constraint they face is, instead, the number of resources at their disposal and, to support their mission, it is generally better to spend on revenue or profit-generating activities than those that obstruct or erode it (like the recommendations in this document).
The top priority among enterprise customers is usually not security, either, regardless of the enterprise being B2B or B2C. Security will only be the top concern about customers if the primary customer is an intelligence agency, which constitutes very few enterprises, especially within the Fortune 500/1000.
Through this lens, advice like “If possible, the engineering network should have no direct access to the internet”11 and “If possible, development systems should not have access to the Internet”12 suggests a mental model of for-profit enterprises that significantly differs from reality. Similarly, decrying “ease of development” features is not a reasonable position in the reality of enterprise software development; more constructive would be to suggest that such features must be considered as part of the system design and protected behind appropriate access controls and audit logging.
Some recommendations would even be considered “bad practice”13 by software engineers from a reliability14 and resilience15 perspective, and therefore rejected. The guide suggests using “a temporary SSH key” to allow admin access into production systems, whereas Ops engineers and SREs often prefer immutable infrastructure specifically to disallow the use of SSH, which helps with reliability (and cuts off a tempting mechanism for attackers).
Objection #5: Security vendor bolt-on solutions are overemphasized
There is a pervasive overemphasis on vendor tooling with near-complete omission of non-vendor solutions. Specifically, the document touts a laundry list of bolt-on commercial solutions by incumbent security vendors – IAST, DAST, RASP, SCA, EDR, IDS, AV, SIEM, DLP, “machine learning-based protection”16 and more – often repeatedly singing their praises17. Rather than providing constructive, sane advice on automating processes and making them repeatable and maintainable, they recommend a smorgasbord of bolt-on tools.
The guidance is explicit in discouraging open-source software as well. There is also little about security through design, such as the D.I.E. triad. Unfortunately, this gives the impression that security vendors successfully lobbied for their inclusion in the document, which calls into question its neutrality18.
In fact, by promoting these commercial security tools, they promote dangerous advice like manual release processes. For instance, they recommend: “Before shipping the package to customers, the developer should perform binary composition analysis to verify the contents of the package.” But developers should not be performing package releases themselves if the desired outcome is high quality, secure software (see Objection #2).
As another example, they recommend that “SAST and DAST should be performed on all code prior to check-in and for each release…” But how is an enterprise supposed to perform DAST/SAST on code before it’s checked in? It is an ad absurdum of “shift left.” It is only one step leftward away from running the tools earlier inside the developer’s brains as they brainstorm what code to write.
But there is no mention of the need to integrate DAST/SAST into developer workflows and ensure that speed is still upheld. In enterprise software security, the success of a security bolt-on solution depends either on usability or coercion.
If you make the secure way the easy way and ensure that software engineers are not required to deviate unduly from their workflows to interact with the security solution, then it is quite likely to beget better security outcomes (or at least not worse productivity outcomes). The alternative is to mandate that a solution must be used; if it is unusable, then it will be bypassed to ensure work still gets done, unless there is sufficient coercion to enforce its use.
When the bolt-on recommendations are combined with their advice elsewhere to disconnect development systems from the internet, it begs the question: How do you use the SCA tools, among others, if the dev systems are not connected to the internet?
“Basic hygiene” is arguably better than any of these bolt-on option, including things like:
- Knowing what dependencies are present
- Being purposeful about what goes into your software
- Choosing a tech stack you can understand and maintain
- Choosing tools that are appropriate for the software you are building19
What does “being purposeful about what goes into your software” mean? It means:
- Including dependencies as part of design, rather than implementation
- Being cautious about adding dependencies
- Knowing why you’ve included other libraries and services
- Understand the packaging concerns of your dependencies; for example, if you include a dependency, what does it cost to feed the beast in terms of operationalizing and shipping it?
- If you take on a dependency in another team’s service, what are their SLOs? Do you trust them? Is it a stable system? Or have there been problems?
- If it’s an open-source library, is it maintained by one person? A team? A company with a support contract you can purchase? A company with a support contract you already have in place? Can you see its updating and patching history?
In essence, the answer is not: “never take on dependencies”20; the answer is to understand what your dependencies are.
Overall, the recommended mitigations are all about outputs21 rather than outcomes22, about security theater rather than actually securing anything and verifying it with evidence. It is clear the guidance does not consider organizations who ship more than once per quarter; in fact, they seem to view fast software delivery as undesirable. They are mistaken (as per Objection #1).
Objection #6: Relevant security and infrastructure innovation is omitted
As mentioned in Objection #5, the document ignores a wealth of innovation in the private sector on software security over the past decade. The guidance seems to take the stance that the NSA/CISA/ODNI way is better than the private sector’s status quo, which is a false dichotomy. In fact, companies like SolarWinds have admitted their slowness was a detriment and have since modernized their practices — including the use of open source — to achieve improved security.
The fact that none of those innovations were included suggests an insular examination of the problem at hand, which erodes the intellectual neutrality of the document. I’ve listed the kinds of security and infrastructure innovations I would expect to see in a reference guide like this below (I have no doubt there are many others worthy of inclusion, too):
- Netflix’s Wall-E framework
- Segment.io on threat modeling
- Segment.io on time-based access
- The WebAssembly (Wasm) component model
- The Bytecode Alliance on Security and Correctness in Wasmtime
- IDE support for cloud-based static analyses
- Software provenance via CI/CD
- Automated patching via IaC
- GitHub’s Dependabot tool
- Resilient security log pipelines with security chaos engineering
- Facebook on 2FA for internal infra authentication
- AWS API Key canarytokens
- Google’s configuration distribution worked example (among many others in the same book)
The guidance would also be strengthened by considering survey data from the private sector, such as the recent Golang survey (which has a section dedicated to Security, including fuzzing) and GitHub’s Octoverse Security report from 2020 (their Dependabot tool is also an arguably glaring omission).
As another example, the document cautions against “allowing an adversary to use backdoors within the remote environment to access and modify source code within an otherwise protected organization infrastructure.” This dismisses the last 30+ years of source code management (SCM) systems.
You cannot just up and change source code without people noticing in modern software delivery. Even subversion is built on the idea of tracking deltas; if you change some code, there exists a record of when that code was changed, by who, and when23. Most development workflows configure the SCM system to require peer approval before merging changes to important branches. It is worrisome if the authoring agencies are unaware of this given it has been the status quo for decades; if their vendors do not exhibit these practices, then this suggests a serious problem with federal procurement.
Objection #7: Inaccuracies about software delivery practices and basic terminology
There are consistent misunderstandings24 and inaccuracies throughout the document about modern software delivery practices, including misunderstandings and inaccuracies about basic terminology, such as CI/CD25, orchestration26, nightly builds27, code repositories28, and more. This is part of a larger cultural problem in information security of trying to regulate29 what they do not understand.
The reference guide does not seem to understand who does what in enterprise engineering teams. Product and engineering management do not define security practices and procedures today, because their priorities are not security but instead whatever success metrics correspond to the business logic under their purview (usually related to revenue and customer adoption). The characterization of QA is particularly perplexing and suggests a significantly different QA discipline exists in intelligence agencies than does in the private sector.
If enterprises were to follow the advice that “software development group managers should ensure that the development process prevents the intentional and unintentional injection of… design flaws into production code,” then software might never be released again in the private sector. The guide also seems to believe that software engineers are unfamiliar with the concept of feature creep30, as if that is not the unfortunate default in product engineering today.
There are also simply perplexing statements. For instance, “An exception to [adjusting the system themselves] would be when an administrator has to fix the mean time to failure in production.” (p. 30, emphasis mine). I do not know what they mean by this and struggle to guess what they might mean. This, and other confusing31 passages32 tarnish the intellectual credibility of the guide.
The guidance is inaccurate even in areas that should be their area of expertise, like cryptography. “The cryptographic signature validates that the software has not been tampered with and was authored by the software supplier.” No, it doesn’t. It validates that the supplier applied for that key at some point; it does not say much about the security properties of the software in question. For instance, there is an anti-cheat driver for the game Genshin Impact whose key still hasn’t been revoked despite being vulnerable to a privilege escalation bug.
Finally, in what is more of an inaccuracy about enterprise security33 than software delivery, the authors refer to “zero-day vulnerabilities” as an “easy compromise vector.”34 This may be true for the Equation Group and their black budget funding but is not true from the perspective of most cybercriminals and, therefore, enterprises.
Enterprises are still wrestling with leaked credentials, social engineering, and misconfigurations (see Objection #8). For a Fortune 500, it is a victory if attackers are forced to use 0day to compromise you; you’ve exhausted all their other options, which should be considered a rightful accomplishment relative to the security status quo.
Objection #8: Confusing, contradictory messages from the authoring agencies
It is confusing to see that the same agency (CISA) who emphasized the need for repeatability and scalability last year only mentions the importance of repeatability once. And that another authoring agency (NSA) stated in their report from January 2020 that supply chain vulnerabilities require a high level of sophistication to exploit while having low prevalence in the wild.
However, this guidance makes it seem like software engineering activities should be designed with supply chain vulnerabilities as the highest weighted factor35. Misconfigurations are given scarce mention, despite the NSA citing them as most prevalent and most likely to be exploited.
In the aforementioned guide by CISA, they highlight some of the benefits of cloud computing and automation. But in this reference guide, they indicate that the cloud is more dangerous than on-premises systems36, without explaining why it might be so.
Much of the language is confusing, too, and never receives clarification. What is a “high risk” defect? What does “cybersecurity hygiene” mean in the context of development environments? They insist that “security defects should be fixed,” but what defines a defect? That it exists? That it’s exploitable? That it’s likely a target for criminals? Nation states? It remains unclear.37
Objection #9: Omission of second order effects and underlying causal factors
There is no consideration of second order effects or underlying causal factors, such as organizational incentives and production pressures.38 (There is one mention, quite in passing, that there might be various constraints the developer faces39). This ignores the rich literature around resilience in complex systems as well as behavioral science more generally. In fact, the recommendations are arguably the opposite of adaptive capacity and reflect rigidity, which is seen as a trap in resilience science40.
If enterprises are to attempt implementing these recommendations (which I very much discourage them from doing), then guidance on how to achieve them despite vertiginous social constraints is essential. Much of what is outlined will be irrelevant if incentives are not changed.
There is also no discussion of user experience (UX) considerations41 when implementing these suggestions, which, perhaps more than what is implemented, will influence security outcomes the most; an unusable workflow will be bypassed. Because the guidance ignores the complexities of software delivery activities and accepts convenient explanations for developer behavior, the resulting advice is often uncivilized42.
There is a missed opportunity to discuss making the secure way the easy way, the importance of minimizing friction in developer workflows, the need to integrate with tooling like IDEs, and so forth. This absence results in a guide that feels both shallow and hollow.
Objection #10: Dangerous absolution of security vendors’ own software security
There is ample discussion of the need to scan software being built or leveraged from third parties, and how a long list of commercial security tools can support this endeavor (see objection #5). Curiously, there is no mention of the need for those tools to be scanned, such as performing SCA for your EDR or anti-virus bolt-on solution.
Security tools usually require privileged access in your systems, whether operating as a kernel module or requiring read/write (R/W) access to critical systems. Combined with the long history of critical vulnerabilities in security tools, this is a rather troubling omission. This is all aside from the numerous software reliability problems engendered by endpoint security tools, which also fail to receive mention. Engineering teams notoriously despise endpoint security on servers for valid reasons: kernel panics, CPUs tanking, and other weird failures that are exasperating to debug.
Given the paranoia about IDEs and other developer tools, it feels strange that security vendors receive absolution and nary a caveat regarding their code security. Where is the recommendation for a proctology exam on the security tools they recommend? Do all of their recommendations for countless hurdles in the way of code deployment apply to patches, too? They are software changes, after all. If they do not apply, then that is a massive loophole for attackers to exploit.
Another surprise is that “anti-virus” is listed as being capable of detecting things like DLL injections43; recent empirical data suggests otherwise even for EDR, which is considered leagues ahead of antivirus solutions. Again, it gives the impression that the guidance is biased in favor of security vendors rather than a more complete set of strategic options. The decimating performance impact these tools can have on the underlying systems, such as kernel panics on production hosts, also fails to receive mention.
If you read this guidance and implement it into your enterprise organization, you will end up securing the supply chain of nothing. Your engineering organization will dismiss you as an ideologue, a fool, or both; else, you will have constrained software engineering activities to such a degree that it makes more sense to abandon delivering software at all. In fairness, the most secure software is the software never written. But, in a world whose progress is now closely coupled with software delivery, we can do better than this document suggests.
Thanks to Coda Hale, James Turnbull, Dr. Nicole Forsgren, Ryan Petrich, and Zac Duncan for their feedback when drafting this post.
They admit that “a developer has inside knowledge of the code base and is often an expert in their respective coding language, environment, and style,” and… this is why we should have the security team as the gatekeeper for determining systems safety and quality? The security team that does not have knowledge of the code base and is not an expert in the coding language, environment, and style… ↩︎
“The use of service accounts, like non-human privileged accounts used to run automated processes, should be minimized and carefully audited.” (p. 30). ↩︎
To wit, they note that developers “must take great care to protect its private key used for the digital signature or hashes…” while a more straightforward recommendation would be to use service accounts and automate the build process. An automated system has traceability into the version, where it was built, reproducible builds, and then the build server signs it. You don’t need an engineer there to personally bless the release. To achieve real security outcomes, you must bless the tree of things that went into that asset, not bless that a person was there to rubber stamp the release. ↩︎
“If possible, development systems should not have access to the Internet and may be deployed as local virtual systems with host-only access.” (p. 20) ↩︎
“If possible, the engineering network should have no direct access to the Internet.” (p. 30) ↩︎
Few organizations outside of the Linux kernel and browsers like Chrome and Firefox are even thinking about using fuzz testing at scale. That isn’t to say that more software engineering teams couldn’t benefit from fuzz testing. But the reality of enterprise dev today is that fuzzing is so far up the hierarchy of needs that it’s like a 16th century peasant dreaming of writing their own gilded manuscript while respectable working conditions and other trappings of basic human dignity are prerequisites. ↩︎
“Performing automatic static and dynamic vulnerability scanning on all components of the system for each committed change is key to the security and integrity of the build process and to validate the readiness of product release.” (p. 16). In a world where these scans take seconds, it might be feasible. In our real world where these scans can take hours and require navigating to a new window, it is counterproductive to suggest them. ↩︎
“All notifications should be evaluated with respect to the relationship to the product and prioritized based on risk assessment.” It will be prioritized based on business impact, which is often negligible. The guide repeatedly presents a world in which security and “risk” are the top priority without shining any real lens on social or organizational factors or providing recommendations on how to influence organizational dynamics. How do you adjust incentives to get “risk” to be treated as a higher priority?
What are all the reasons to buy a software composition analysis tool? . It’s challenging to take the guidance seriously as a result. ↩︎
Developers want and need internet access to do their jobs because the internet is, by design, a fabulous reference tool and building software requires knowing many things, so many things, in fact, that it’s difficult to hold it all in your head and it’s much cheaper, effort-wise, to google “how python list” for the thousandth time. ↩︎
As part of “hardening the development environment” they recommend operating a VPN and a jump host behind which a shared corporate development environment limps along with endpoint security software installed. This creates many layers of delay and extra latency. ↩︎
The guide doesn’t explicitly forbid torrenting Stack Overflow and hosting your own offline copy of it… or printing Stack Overflow out as a gargantuan tome, an intimidating new edition to your office coffee room. Need help with Flask? Just turn to page 1,337,420 to read each Stack Overflow post about it. I think I am mostly kidding but also suspect that software engineers at real enterprises might resort to that if faced with the prospect of “no internet in engineering systems.” ↩︎
And if you shouldn’t use the internet in the development system, then how is this advice even conveyed to developers? A bearded prophet descends the mountain bearing a stone tablet inscribed with the recommendation, “Don’t use the internet,” and then software is absolved of all its sins, I suppose. ↩︎
For example, they recommend the ability to “raise privileges” for just one function and then lower it; this indicates that the software can have its privileges raised at any point in time, including after attack. Instead, they should advocate for privilege separation and sandboxing. ↩︎
They reference “fail-safe defaults,” and while it remains unclear what they mean, my guess is they mean “fail closed,” which software engineers of the infra and ops variety would also dislike. This is common appsec advice, usually given with the recommendation to sprinkle some redundancy onto the system as a “quick fix” for any reliability issues that surface. Nothing is more infosec than treating software engineers like they are negligent fools for overlooking an obscure vulnerability while believing that delivering reliable software is trivial. ↩︎
Metapod, the Pokémon, has a move called “harden” that does nothing (basically a no-op). This feels fitting for the section in question entitled “Harden the Build Environment.” ↩︎
Why specify the specific tools and not the goal outcomes? Anyone who’s wrestled with ML-based security tools knows that they gobble up needed resources on dev laptops while also needing lots of babying in the form of tuning and maintenance and triaging. But such concerns remain unmentioned in the reference guide. ↩︎
For instance, the document repeatedly recommends software composition analysis (SCA), another bolt-on solution: “Software Composition Analysis should be performed on all third-party software.” And, in the context of missing SBOMs: “the developer team will derive the required information to describe the third-party component within the SBOM for example by using software composition analysis tools.” (p. 27) ↩︎
The scent of grift wafts throughout the whole guide, unfortunately. To defend against an “exploited signing server,” they recommend controls like a security information and event management system (SIEM) and data loss prevention (DLP). They could have recommended a centralized system to consume and analyze logs, but they instead recommend a specific type of tool. Additionally, where is the mention of transparency logs? Transparency logs make sure you aren’t signing builds with a production key. The signing server accepts the signing requests and logs them. If it isn’t in the logs, then the signing server is potentially pwned. Reproducible builds are more important than signing. With the former, you can go back and see what went in the deployment if something goes wrong. ↩︎
For instance, if you’re building software for microcontrollers, maybe don’t pick Java as your language of choice because it has a runtime you need to ship with your application that’s somewhat large and would take up precious ROM space. If your software needs to be portable, then choose a language that is portable. ↩︎
You can take the view that you’ll be the steward of an open-source project within your organization, but it’s an option that is rather expensive. It’s a free thing, but it’s made with different ideas, constraints, and assumptions that don’t necessarily match what you need. How do you incentivize this curiosity about dependencies? The best way is to hold people accountable to their SLOs. You can also leverage the “shadow of the future” – the tendency for humans to be on better behavior when they believe they’ll have repeated interactions with their counterparty in the future. ↩︎
“The Secure SDLC identifies the exact procedures and policies that are used to ensure that secure development practices are implemented and artifacts are created to attest to the adherence of the adopted Secure SDLC plan with respect to the implementation and distribution of the product.” The point of the “Secure SDLC” therefore appears to be attesting that you’re adhering to the plan, rather than actually securing the product. If IaC tools are especially valuable for anything, it is creating artifacts; it allows software engineers to point to a tangible thing and say: “look at this thing I did” rather than their actions disappearing when they close their terminal or enough new commands send it out of view. ↩︎
“Successful completion [of security training] should be tracked for all engineers.” (p. 10) They at least make it explicit that they only care about outputs rather than outcomes. All that matters is completion, not whether software quality has actually improved. ↩︎
Usually there is a “why” too, but standards for commit messages vary. ↩︎
“…developers assigned to create the threat models use component-level designs for completeness.” I don’t know what this means, and I am considered an expert in threat modeling. ↩︎
“[The release branch] should be protected with reviewers and continuous integration/continuous delivery (CI/CD) tests with SAST enforced at the SCM.” This sentence alone suggests that the guide is confused on what CI/CD is, both in terms of how it works and why enterprises have adopted the practice. Further evidence is found in this passage: “Continuous integration/continuous deployment. In this case, the software is installed in a subset of the cloud for immediate feedback and A/B testing.” (p. 28) An enterprise could do that, and CI/CD might help, but that isn’t what CI/CD is in itself. The bullet immediately after it says, “Building software as part of a rapid iterative cycle, such as using an Agile Development Method.” This is frustrating. ↩︎
One section uses the phrase “the CD orchestrator” and it’s quite unclear what they mean. Do they mean GitHub Actions? But that isn’t “the only entity that manages all the environments.” Do they mean Terraform? I don’t think they mean Kubernetes, not only because k8s wouldn’t be responsible for version control (we must keep waiting for git push to k8s), but also because they have another sentence in this section about Kubernetes: “Also ensure that the administrator tools are not in the public environment such as a Kubernetes cluster.” I do not understand what they are trying to say and, overall, this section strongly suggests that there are pervasive misunderstandings about what CD, orchestrators, and public environments are. ↩︎
“The nightly build process also acts as a good performance matrix to assess the developer capabilities and comply with security and development processes.” (p. 17) That is not what nightlies are for. Nightlies are to integrate merged changes from the day before and run tests that are too expensive or lengthy to run on every build (at least in any sane workflow). It is not an opportunity to bully developers. ↩︎
“For example, apply continuous monitoring to prevent, detect, and remediate threats against the repository” (p. 36). What does this mean? Do they know what a repository is? ↩︎
The guidance presents a development model with some dreadful release branch and… review/approval when moving code from trunk to release. How are you going to review a giant stew of source code when promoting? Unless you are not reviewing and instead are rubber stamping to meet some secure development fertilizer sandwich of a process. ↩︎
“During the coding and implementation of the system, care must be taken to ensure that all development efforts map to specific system requirements and that there is no ‘feature creep’ that might compromise product integrity or inject vulnerabilities.” ↩︎
For instance, “This ensures the feature set is met and nothing exists for any feature creep." (p. 16) I have no idea how to parse “nothing exists for any feature creep.” ↩︎
They mention “structural vulnerabilities,” as in, “ensure neither the code nor systems have structural vulnerabilities” and then never explain what is meant by “structural.” Is it a vulnerability in a load-bearing component? Is it a couture vulnerability made of crisp, sculptural fabric? The word never appears again, so the mystery remains. ↩︎
They make the claim “Code signing is usually the last line of defense against a software supply chain exploit” and… is this true? This doesn’t feel right. What is the typical process for a supply chain exploit? Because my mental model of them is that the attack happens before signing. ↩︎
They expound upon “common compromise techniques such as buffer overflows, ROP execution gadgets, delayed dynamic function loading,” and so forth. I am curious what they think “common” is. Common for what the NSA sees from its peer adversaries? Or common for the typical private sector enterprise? What is “common” to the typical enterprise is less buffer overflow exploits and more, “some employee VPN credentials were leaked last year and criminals used them to gain access to our network share and ransomwared it.” I am uncertain if the advice in this guide would stop such common concerns. In fact, I suspect these recommendations exacerbate the problem by recommending slower software changes and bolt-on solutions like VPNs and on-prem network segmentation. ↩︎
They state that “Over the last few years, these next-generation software supply chain compromises have significantly increased for both open source and commercial software products." But they do not outline any sources or statistics to back this claim. ↩︎
“e.g. cloud products should be pen-tested more frequently”. (p. 8) Why? ↩︎
The reference guide also recommends that both SAST/DAST and SCA should be “performed to determine if the risk is acceptable.” But what is “acceptable”? Is it based on the security team’s point of view? Is it based on the organization as an ecosystem of stakeholders who all have disparate points of view? Is it based on the point of view of intelligence agencies, who, naturally, think enterprises should prioritize defense above all other endeavors? ↩︎
They spend a lot of words on “compromised engineers” as a “difficult threat.” They reference things like “poor performance reviews, lack of promotion, or disciplinary actions” but fail to mention production pressures more generally. ↩︎
They finally mention constraints and hint at production pressures with: “Depending on the complexity, security requirements, development resources available, and time constraints…” (p. 15) ↩︎
Fath, B. D., Dean, C. A., & Katzmair, H. (2015). Navigating the adaptive cycle: an approach to managing the resilience of social systems. Ecology and Society, 20(2). ↩︎
There is finally a mention of UX on page 10: “Gaps should be examined to determine and address root causes, e.g., if there is a lack of usable tools to implement organizational security expectations.” But it is the sole mention. And there are a few things still objectionable in that sentence, like the term “root cause” and, also, how do you implement an expectation? ↩︎
The guide somewhat dehumanizes developers as a result; at one point they literally use the pronoun of “it” to refer to a developer. ↩︎
They suggest that “many antivirus products provide behavior analysis engines to provide additional security checks” like heap spray mitigation, stack pivot detection, DLL injection detection, and so forth. ↩︎
2022-09-15 13:57 -0400