CVE-2020-25637
libvirt - security update
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.
How to fix CVE-2020-25637
To remediate CVE-2020-25637, upgrade the affected package to a fixed version below.
- —upgrade to 6.6.0-r3 or later
- —upgrade to 6.8.0-1 or later
- —upgrade to 3.0.0-4+deb9u5 or later
Is CVE-2020-25637 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 6.6.0-r3
- from 0, < 6.8.0-1
- from 0, < 3.0.0-4+deb9u5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |