A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.
Advisories
Source ID Title
Debian DLA Debian DLA DLA-3061-1 firejail security update
Debian DSA Debian DSA DSA-5167-1 firejail security update
EUVD EUVD EUVD-2022-52798 A Privilege Context Switching issue was discovered in join.c in Firejail 0.9.68. By crafting a bogus Firejail container that is accepted by the Firejail setuid-root program as a join target, a local attacker can enter an environment in which the Linux user namespace is still the initial user namespace, the NO_NEW_PRIVS prctl is not activated, and the entered mount namespace is under the attacker's control. In this way, the filesystem layout can be adjusted to gain root privileges through execution of available setuid-root binaries such as su or sudo.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-03T07:11:39.674Z

Reserved: 2022-05-19T00:00:00

Link: CVE-2022-31214

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-06-09T16:15:08.977

Modified: 2024-11-21T07:04:08.840

Link: CVE-2022-31214

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.