GHSA-65p9-r9h6-22vj

Suggest an improvement
Source
https://github.com/advisories/GHSA-65p9-r9h6-22vj
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-65p9-r9h6-22vj/GHSA-65p9-r9h6-22vj.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-65p9-r9h6-22vj
Aliases
Downstream
CGA (80)
MINI (16)
Published
2026-03-03T20:09:25Z
Modified
2026-09-10T03:50:37Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
AWS-LC has Timing Side-Channel in AES-CCM Tag Verification
Details

Summary

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

Impact

Observable timing discrepancy in AES-CCM decryption in AWS-LC allows an unauthenticated user to potentially determine authentication tag validity via timing analysis.

The impacted implementations are through the EVP CIPHER API: EVP_aes_128_ccm, EVP_aes_192_ccm, and EVP_aes_256_ccm.

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.

Impacted versions:

  • aws-lc-sys versions: >= 0.14.0, < 0.38.0
  • aws-lc-fips-sys versions: >= v0.13.0, < 0.13.12.

Patches

The patch is included in aws-lc-sys v.0.38.0 and aws-lc-fips-sys v0.13.12.

Workarounds

In the special cases of using AES-CCM with (M=4, L=2), (M=8, L=2), or (M=16, L=2), applications can workaround this issue by using AES-CCM through the EVP AEAD API using implementations EVP_aead_aes_128_ccm_bluetooth, EVP_aead_aes_128_ccm_bluetooth_8, and, EVP_aead_aes_128_ccm_matter respectively.

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.

Resources

If there are any questions or comments about this advisory, contact [AWS/Amazon] Security via thevulnerability reporting page or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue.

Acknowledgement

AWS-LC would like to thank Joshua Rogers (https://joshua.hu/) for collaborating on this issue through the coordinated vulnerability disclosure process.

Database specific 
{
    "cwe_ids":  [
        "CWE-208"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-03-03T20:09:25Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}
References

Affected packages

crates.io / aws-lc-sys

Package

Name
aws-lc-sys
View open source insights on deps.dev
Purl
pkg:cargo/aws-lc-sys

Affected ranges

Type
SEMVER
Events
Introduced
0.14.0
Fixed
0.38.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-65p9-r9h6-22vj/GHSA-65p9-r9h6-22vj.json"

crates.io / aws-lc-fips-sys

Package

Name
aws-lc-fips-sys
View open source insights on deps.dev
Purl
pkg:cargo/aws-lc-fips-sys

Affected ranges

Type
SEMVER
Events
Introduced
0.13.0
Fixed
0.13.12

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-65p9-r9h6-22vj/GHSA-65p9-r9h6-22vj.json"