| Name | CVE-2021-3631 |
| Description | A flaw was found in libvirt while it generates SELinux MCS category pairs for VMs' dynamic labels. This flaw allows one exploited guest to access files labeled for another guest, resulting in the breaking out of sVirt confinement. The highest threat from this vulnerability is to confidentiality and integrity. |
| 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-3778-1 |
| Debian Bugs | 990709 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| libvirt (PTS) | jessie, jessie (lts) | 1.2.9-9+deb8u7 | vulnerable |
| stretch (security), stretch (lts), stretch | 3.0.0-4+deb9u5 | vulnerable |
| buster | 5.0.0-4+deb10u1 | vulnerable |
| buster (security) | 5.0.0-4+deb10u2 | fixed |
| bullseye | 7.0.0-3+deb11u2 | vulnerable |
| bookworm | 9.0.0-4 | fixed |
| sid, trixie | 10.2.0-1 | fixed |
The information below is based on the following data on fixed versions.
Notes
[bullseye] - libvirt <no-dsa> (Minor issue)
[stretch] - libvirt <no-dsa> (Minor issue)
https://gitlab.com/libvirt/libvirt/-/issues/153
Fixed by: https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2 (v7.5.0)
[jessie] - libvirt <no-dsa> (Minor issue)