Ubuntu 16.04 ESM : Git vulnerability (USN-5686-2)

high Nessus Plugin ID 167834


The remote Ubuntu host is missing a security update.


The remote Ubuntu 16.04 ESM host has packages installed that are affected by a vulnerability as referenced in the USN-5686-2 advisory.

- Git is an open source, scalable, distributed revision control system. `git shell` is a restricted login shell that can be used to implement Git's push/pull functionality via SSH. In versions prior to 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4, the function that splits the command arguments into an array improperly uses an `int` to represent the number of entries in the array, allowing a malicious actor to intentionally overflow the return value, leading to arbitrary heap writes. Because the resulting array is then passed to `execv()`, it is possible to leverage this attack to gain remote code execution on a victim machine. Note that a victim must first allow access to `git shell` as a login shell in order to be vulnerable to this attack. This problem is patched in versions 2.30.6, 2.31.5, 2.32.4, 2.33.5, 2.34.5, 2.35.5, 2.36.3, and 2.37.4 and users are advised to upgrade to the latest version.
Disabling `git shell` access via remote logins is a viable short-term workaround. (CVE-2022-39260)

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


Update the affected packages.

See Also


Plugin Details

Severity: High

ID: 167834

File Name: ubuntu_USN-5686-2.nasl

Version: 1.5

Type: local

Agent: unix

Published: 11/18/2022

Updated: 7/10/2023

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information


Risk Factor: Medium

Score: 6.7


Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2022-39260


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:esm, p-cpe:/a:canonical:ubuntu_linux:git, p-cpe:/a:canonical:ubuntu_linux:git-all, p-cpe:/a:canonical:ubuntu_linux:git-arch, p-cpe:/a:canonical:ubuntu_linux:git-core, p-cpe:/a:canonical:ubuntu_linux:git-cvs, p-cpe:/a:canonical:ubuntu_linux:git-daemon-run, p-cpe:/a:canonical:ubuntu_linux:git-daemon-sysvinit, p-cpe:/a:canonical:ubuntu_linux:git-el, p-cpe:/a:canonical:ubuntu_linux:git-email, p-cpe:/a:canonical:ubuntu_linux:git-gui, p-cpe:/a:canonical:ubuntu_linux:git-man, p-cpe:/a:canonical:ubuntu_linux:git-mediawiki, p-cpe:/a:canonical:ubuntu_linux:git-svn, p-cpe:/a:canonical:ubuntu_linux:gitk, p-cpe:/a:canonical:ubuntu_linux:gitweb

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

Exploit Ease: No known exploits are available

Patch Publication Date: 11/17/2022

Vulnerability Publication Date: 10/18/2022

Reference Information

CVE: CVE-2022-39260

USN: 5686-2