CVE-2021-3631

Summary

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.

Affected Software

Weaknesses

• CWE-732: CWE-732

ADP Enrichment

CVE Program Container

Additional References

• https://bugzilla.redhat.com/show_bug.cgi?id=1977726
• https://gitlab.com/libvirt/libvirt/-/issues/153
• https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2
• https://access.redhat.com/errata/RHSA-2021:3631
• https://security.netapp.com/advisory/ntap-20220331-0010/
• https://security.gentoo.org/glsa/202210-06
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

References

• https://bugzilla.redhat.com/show_bug.cgi?id=1977726
• https://gitlab.com/libvirt/libvirt/-/issues/153
• https://gitlab.com/libvirt/libvirt/-/commit/15073504dbb624d3f6c911e85557019d3620fdb2
• https://access.redhat.com/errata/RHSA-2021:3631
• https://security.netapp.com/advisory/ntap-20220331-0010/
• https://security.gentoo.org/glsa/202210-06
• https://lists.debian.org/debian-lts-announce/2024/04/msg00000.html

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