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.
History

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2022-06-09T00:00:00

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: 2023-11-07T03:47:35.620

Link: CVE-2022-31214

cve-icon Redhat

No data.