Debian DSA-5167-1 : firejail - security update

high Nessus Plugin ID 162506

Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 10 / 11 host has packages installed that are affected by a vulnerability as referenced in the dsa-5167 advisory.

- 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

Upgrade the firejail packages.

For the stable distribution (bullseye), this problem has been fixed in version 0.9.64.4-2+deb11u1.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1012510

https://security-tracker.debian.org/tracker/source-package/firejail

https://www.debian.org/security/2022/dsa-5167

https://security-tracker.debian.org/tracker/CVE-2022-31214

https://packages.debian.org/source/buster/firejail

https://packages.debian.org/source/bullseye/firejail

Plugin Details

Severity: High

ID: 162506

File Name: debian_DSA-5167.nasl

Version: 1.2

Type: local

Agent: unix

Published: 6/23/2022

Updated: 6/23/2022

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 5.3

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

Temporal Vector: E:U/RL:OF/RC: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: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:firejail, p-cpe:/a:debian:debian_linux:firejail-profiles, cpe:/o:debian:debian_linux:10.0, cpe:/o:debian:debian_linux:11.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2022

Vulnerability Publication Date: 6/9/2022

Reference Information

CVE: CVE-2022-31214