| Name | CVE-2020-25637 |
| Description | A double free memory issue was found to occur in the libvirt API, in versions before 6.8.0, responsible for requesting information about network interfaces of a running QEMU domain. This flaw affects the polkit access control driver. Specifically, clients connecting to the read-write socket with limited ACL permissions could use this flaw to crash the libvirt daemon, resulting in a denial of service, or potentially escalate their privileges on the system. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. |
| 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-2395-1, DLA-3778-1 |
| Debian Bugs | 971555 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libvirt (PTS) | jessie, jessie (lts) | 1.2.9-9+deb8u8 | fixed |
| stretch (security) | 3.0.0-4+deb9u5 | fixed | |
| stretch (lts), stretch | 3.0.0-4+deb9u6 | fixed | |
| buster (security), buster, buster (lts) | 5.0.0-4+deb10u2 | fixed | |
| bullseye | 7.0.0-3+deb11u3 | fixed | |
| bookworm | 9.0.0-4+deb12u2 | fixed | |
| sid, trixie | 10.9.0-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libvirt | source | jessie | (not affected) | |||
| libvirt | source | stretch | 3.0.0-4+deb9u5 | DLA-2395-1 | ||
| libvirt | source | buster | 5.0.0-4+deb10u2 | DLA-3778-1 | ||
| libvirt | source | (unstable) | 6.8.0-1 | 971555 |
Introduced by: https://libvirt.org/git/?p=libvirt.git;a=commit;h=0977b8aa071de550e1a013d35e2c72615e65d520 (v1.2.14-rc1)
Fixed by: https://libvirt.org/git/?p=libvirt.git;a=commit;h=955029bd0ad7ef96000f529ac38204a8f4a96401 (v6.8.0)
Fixed by: https://libvirt.org/git/?p=libvirt.git;a=commit;h=50864dcda191eb35732dbd80fb6ca251a6bba923 (v6.8.0)
Fixed by: https://libvirt.org/git/?p=libvirt.git;a=commit;h=e4116eaa44cb366b59f7fe98f4b88d04c04970ad (v6.8.0)
Fixed by: https://libvirt.org/git/?p=libvirt.git;a=commit;h=a63b48c5ecef077bf0f909a85f453a605600cf05 (v6.8.0)
[jessie] - libvirt <not-affected> (Vulnerable code introduced later)