A Git security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 22.04 LTS.

USN-5686-1: Git vulnerabilities

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Ubuntu Security Notice USN-5686-1
October 18, 2022

git vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Git.

Software Description:
- git: fast, scalable, distributed revision control system

Details:

Cory Snider discovered that Git incorrectly handled certain symbolic links.
An attacker could possibly use this issue to cause an unexpected behaviour.
(CVE-2022-39253)

Kevin Backhouse discovered that Git incorrectly handled certain command strings.
An attacker could possibly use this issue to arbitrary code execution.
(CVE-2022-39260)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 22.04 LTS:
git 1:2.34.1-1ubuntu1.5

Ubuntu 20.04 LTS:
git 1:2.25.1-1ubuntu3.6

Ubuntu 18.04 LTS:
git 1:2.17.1-1ubuntu0.13

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5686-1
CVE-2022-39253, CVE-2022-39260

Package Information:
  https://launchpad.net/ubuntu/+source/git/1:2.34.1-1ubuntu1.5
  https://launchpad.net/ubuntu/+source/git/1:2.25.1-1ubuntu3.6
  https://launchpad.net/ubuntu/+source/git/1:2.17.1-1ubuntu0.13