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Ubuntu Security Notice USN-7023-1
September 19, 2024

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Git.

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

Details:

Maxime Escourbiac and Yassine Bengana discovered that Git incorrectly
handled some gettext machinery. An attacker could possibly use this issue
to allows the malicious placement of crafted messages. This issue was fixed
in Ubuntu 16.04 LTS. (CVE-2023-25815)

It was discovered that Git incorrectly handled certain submodules.
An attacker could possibly use this issue to execute arbitrary code.
This issue was fixed in Ubuntu 18.04 LTS. (CVE-2024-32002)

It was discovered that Git incorrectly handled certain cloned repositories.
An attacker could possibly use this issue to execute arbitrary code. This
issue was fixed in Ubuntu 18.04 LTS. (CVE-2024-32004, CVE-2024-32465)

It was discovered that Git incorrectly handled local clones with hardlinked
files/directories. An attacker could possibly use this issue to place a
specialized repository on their target’s local system. This issue was fixed
in Ubuntu 18.04 LTS. (CVE-2024-32020)

It was discovered that Git incorrectly handled certain symlinks. An
attacker could possibly use this issue to impact availability and
integrity creating hardlinked arbitrary files into users repository’s
objects/directory. This issue was fixed in Ubuntu 18.04 LTS.
(CVE-2024-32021)

Update instructions:

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

Ubuntu 18.04 LTS
   git                             1:2.17.1-1ubuntu0.18+esm1
                                   Available with Ubuntu Pro

Ubuntu 16.04 LTS
   git                             1:2.7.4-0ubuntu1.10+esm8
                                   Available with Ubuntu Pro

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

References:
   https://ubuntu.com/security/notices/USN-7023-1
   CVE-2023-25815, CVE-2024-32002, CVE-2024-32004, CVE-2024-32020,
   CVE-2024-32021, CVE-2024-32465