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GLSA-202305-19 : Firejail: Local Privilege Escalation

high Nessus Plugin ID 175060

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Description

The remote host is affected by the vulnerability described in GLSA-202305-19 (Firejail: Local Privilege Escalation)

 - 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. (CVE-2022-31214)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Gentoo has discontinued support for sys-apps/firejail-lts. Users should unmerge it in favor of sys-apps/firejail:

 # emerge --ask --depclean --verbose sys-apps/firejail-lts # emerge --ask --verbose sys-apps/firejail All Firejail users should upgrade to the latest version:

 # emerge --ask --oneshot --verbose >=sys-apps/firejail-0.9.70

See Also

https://security.gentoo.org/glsa/202305-19

https://bugs.gentoo.org/show_bug.cgi?id=850748

Plugin Details

Severity: High

ID: 175060

File Name: gentoo_GLSA-202305-19.nasl

Version: 1.0

Type: local

Published: 5/3/2023

Updated: 5/3/2023

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2022-31214

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:gentoo:linux:firejail, cpe:/o:gentoo:linux

Required KB Items: Host/local_checks_enabled, Host/Gentoo/release, Host/Gentoo/qpkg-list

Exploit Ease: No known exploits are available

Patch Publication Date: 5/3/2023

Vulnerability Publication Date: 6/9/2022

Reference Information

CVE: CVE-2022-31214