CVE-2023-1521: sccache vulnerable to privilege escalation if server is run as root

May 30, 2023

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.

If the server is run as root (which is the default when installing the snap package), this means a user running the sccache client can get root privileges.

References

github.com/advisories/GHSA-x7fr-pg8f-93f5
github.com/mozilla/sccache
github.com/mozilla/sccache/releases/tag/v0.4.0
github.com/mozilla/sccache/security/advisories/GHSA-x7fr-pg8f-93f5
nvd.nist.gov/vuln/detail/CVE-2023-1521

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