CVE-2023-1521 — On Linux the sccache client can execute arbitrary code with the privileges of a

On Linux the sccache client can execute arbitrary code with the privileges of a local sccache server, by preloading the code in a shared library passed to LD_PRELOAD.

01What is this vulnerability?

On Linux the sccache client can execute arbitrary code with the privileges of a local sccache server, by preloading the code in a shared library passed to LD_PRELOAD.

02Affected products

Vendor	Product	Versions
Mozilla	sccache	0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-11-26T11:15:59.434Z
• Last modified: 2024-11-26T20:45:48.176Z

09References

• securitylab.github.com — https://securitylab.github.com/advisories/GHSL-2023-046_ScCache
• github.com — https://github.com/advisories/GHSA-x7fr-pg8f-93f5