| Name | CVE-2021-30465 |
| Description | runc before 1.0.0-rc95 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3369-1 |
| Debian Bugs | 988768 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| runc (PTS) | stretch (security), stretch (lts), stretch | 0.1.1+dfsg1-2+deb9u3 | vulnerable |
| buster (security), buster, buster (lts) | 1.0.0~rc6+dfsg1-3+deb10u3 | fixed |
| bullseye | 1.0.0~rc93+ds1-5+deb11u5 | fixed |
| bullseye (security) | 1.0.0~rc93+ds1-5+deb11u3 | fixed |
| bookworm (security), bookworm | 1.1.5+ds1-1+deb12u1 | fixed |
| sid, trixie | 1.1.15+ds1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| runc | source | stretch | (unfixed) | end-of-life | | |
| runc | source | buster | 1.0.0~rc6+dfsg1-3+deb10u2 | | DLA-3369-1 | |
| runc | source | (unstable) | 1.0.0~rc93+ds1-5 | | | 988768 |
Notes
[stretch] - runc <no-dsa> (Intrusive to backport fix)
https://www.openwall.com/lists/oss-security/2021/05/19/2
https://github.com/opencontainers/runc/security/advisories/GHSA-c3xm-pvg7-gh7r
Initial patch in -4, but revised patch was applied only in -5