CVE-2021-30465: Path Traversal

May 27, 2021 (updated November 9, 2023)

runc allows a Container Filesystem Breakout via Directory Traversal. To exploit the vulnerability, an attacker must be able to create multiple containers with a fairly specific mount configuration. The problem occurs via a symlink-exchange attack that relies on a race condition.

References

github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r
nvd.nist.gov/vuln/detail/CVE-2021-30465

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