==========================================================================
Ubuntu Security Notice USN-7626-2
July 09, 2025

git regression
==========================================================================

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

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

USN-7626-1 introduced a regression in Git.

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

Details:

USN-7626-1 fixed vulnerabilities in Git. The update introduced a regression
in gitk and git-gui. This update reverts the corresponding fixes for
CVE-2025-27613 and CVE-2025-46835 pending further investigation.

We apologize for the inconvenience.

Original advisory details:

 Avi Halachmi discovered that Git incorrectly managed file modification
 constraints with Gitk. An attacker could possibly use this issue to create
 or write to arbitrary files on the system. (CVE-2025-27613)

 Avi Halachmi discovered that Git incorrectly handled arguments when
 invoking the Gitk utility. If a user were tricked into cloning a malicious
 Git repository, an attacker could possibly use this issue to run arbitrary
 commands. This issue only affected Ubuntu 24.04 LTS, Ubuntu 24.10, and
 Ubuntu 25.04. (CVE-2025-27614)

 Johannes Sixt discovered that Git incorrectly managed file modification
 constraints with Git GUI. If a user were tricked into editing a file in a
 malicious Git repository, an attacker could possibly use this issue to
 create or write to arbitrary files on the system. (CVE-2025-46835)

 David Leadbeater discovered that Git incorrectly stripped CRLF characters
 when editing configuration files. An attacker could possibly use this
 issue to execute arbitrary code. (CVE-2025-48384)

 David Leadbeater discovered that Git incorrectly handled verification when
 fetching remote Git repositories. An attacker could possibly use this
 issue to perform protocol injection, leading to arbitrary code execution.
 This issue only affected Ubuntu 24.04 LTS, Ubuntu 24.10, and Ubuntu 25.04.
 (CVE-2025-48385)

 David Leadbeater discovered that Git incorrectly handled memory with the
 wincred credential helper. An attacker could possibly use this issue to
 cause a denial of service. (CVE-2025-48386)

Update instructions:

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

Ubuntu 22.04 LTS
  git-gui                         1:2.34.1-1ubuntu1.14
  gitk                            1:2.34.1-1ubuntu1.14

Ubuntu 20.04 LTS
  git-gui                         1:2.25.1-1ubuntu3.14+esm2
                                  Available with Ubuntu Pro
  gitk                            1:2.25.1-1ubuntu3.14+esm2
                                  Available with Ubuntu Pro

Ubuntu 18.04 LTS
  git-gui                         1:2.17.1-1ubuntu0.18+esm3
                                  Available with Ubuntu Pro
  gitk                            1:2.17.1-1ubuntu0.18+esm3
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  git-gui                         1:2.7.4-0ubuntu1.10+esm10
                                  Available with Ubuntu Pro
  gitk                            1:2.7.4-0ubuntu1.10+esm10
                                  Available with Ubuntu Pro

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

References:
  https://ubuntu.com/security/notices/USN-7626-2
  https://ubuntu.com/security/notices/USN-7626-1
  https://launchpad.net/bugs/2116251

Package Information:
  https://launchpad.net/ubuntu/+source/git/1:2.34.1-1ubuntu1.14