CVE-2022-47952

published 2023-01-01

CVE-2022-47952: 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…

Priority P4 11 low 3.3 CVSS 3.1

AV L AC L PR L UI N S U C L I N A N

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.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
debian	lxc	< lxc 1:5.0.2-1 (bookworm)	lxc 1:5.0.2-1 (bookworm)
linuxcontainers	lxc	<= 5.0.1	—
linuxcontainers	lxc	>= 0 < 1:4.0.6-2+deb11u2	1:4.0.6-2+deb11u2
linuxcontainers	lxc	>= 0 < 1:5.0.2-1	1:5.0.2-1
linuxcontainers	lxc	>= 0 < 1:5.0.2-1	1:5.0.2-1
linuxcontainers	lxc	>= 0 < 1:5.0.2-1	1:5.0.2-1

CVSS provenance

nvd v3.1 3.3 LOW CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

osv 3.3 LOW

vendor_debian 3.3 LOW

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-203 CWE-668