CVE-2022-47952
lxc - security update
Description
lxc-user-nic in lxc through 5.0.1 is installed setuid root, and may allow local users to infer whether any file exists, even within a protected directory tree, because "Failed to open" often indicates that a file does not exist, whereas "does not refer to a network namespace path" often indicates that a file exists. NOTE: this is different from CVE-2018-6556 because the CVE-2018-6556 fix design was based on the premise that "we will report back to the user that the open() failed but the user has no way of knowing why it failed"; however, in many realistic cases, there are no plausible reasons for failing except that the file does not exist.
How to fix CVE-2022-47952
To remediate CVE-2022-47952, upgrade the affected package to a fixed version below.
- —upgrade to 4.0.10-r2 or later
- —upgrade to 1:4.0.6-2+deb11u2 or later
- —upgrade to 1:3.1.0+really3.0.3-8+deb10u1 or later
Is CVE-2022-47952 being exploited?
Low — EPSS is 2.3%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 4.0.10-r2
- from 0, < 1:4.0.6-2+deb11u2
- from 0, < 1:3.1.0+really3.0.3-8+deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.3 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |