GHSA-9F94-5G5W-GF6R

AWS-LC is an open-source, general-purpose cryptographic library.

Impacted versions:

• aws-lc-sys >= v0.15.0, < v0.39.0
• aws-lc-fips-sys >= v0.13.0, < v0.13.13

Workarounds

Applications can workaround this issue if they do not enable CRL checking (X509_V_FLAG_CRL_CHECK). Applications using complete (non-partitioned) CRLs without IDP extensions are also not affected.

Otherwise, there is no workaround and applications using aws-lc-sys or aws-lc-fips-sys should upgrade to the most recent releases of aws-lc-sys or aws-lc-fips-sys.

References

If you have any questions or comments about this advisory, we ask that you contact AWS Security via our vulnerability reporting page or directly via email to [email protected]. Please do not create a public GitHub issue.

A logic error in CRL distribution point matching in AWS-LC allows a revoked certificate to bypass revocation checks during certificate validation, when the application enables CRL checking and uses partitioned CRLs with Issuing Distribution Point (IDP) extensions.

Customers of AWS services do not need to take action. aws-lc-sys and aws-lc-fips-sys contain code from AWS-LC. Applications using aws-lc-sys or aws-lc-fips-sys should upgrade to the most recent releases of aws-lc-sys or aws-lc-fips-sys.

GHSA-9F94-5G5W-GF6R has a CVSS score of 7.4 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (0.13.13, 0.39.0); upgrading removes the vulnerable code path.

Kodem intelligence

The patch is included in aws-lc-sys v0.39.0 and aws-lc-fips-sys v0.13.13.

1. What is GHSA-9F94-5G5W-GF6R? GHSA-9F94-5G5W-GF6R is a high-severity security vulnerability in aws-lc-fips-sys (rust), affecting versions >= 0.13.0, < 0.13.13. It is fixed in 0.13.13, 0.39.0.
2. How severe is GHSA-9F94-5G5W-GF6R? GHSA-9F94-5G5W-GF6R has a CVSS score of 7.4 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which packages are affected by GHSA-9F94-5G5W-GF6R?
   • aws-lc-fips-sys (rust) (versions >= 0.13.0, < 0.13.13)
   • aws-lc-sys (rust) (versions >= 0.15.0, < 0.39.0)
4. Is there a fix for GHSA-9F94-5G5W-GF6R? Yes. GHSA-9F94-5G5W-GF6R is fixed in 0.13.13, 0.39.0. Upgrade to this version or later.
5. Is GHSA-9F94-5G5W-GF6R exploitable, and should I be worried? Whether GHSA-9F94-5G5W-GF6R is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether GHSA-9F94-5G5W-GF6R is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix GHSA-9F94-5G5W-GF6R?
   • Upgrade aws-lc-fips-sys to 0.13.13 or later
   • Upgrade aws-lc-sys to 0.39.0 or later