This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--===============3032079738506643170==
Content-Language: en-US
Content-Type: multipart/signed; micalg=pgp-sha256;
 protocol="application/pgp-signature";
 boundary="------------ZnR9UrbnPykKrj5krnBPTZpf"

This is an OpenPGP/MIME signed message (RFC 4880 and 3156)
--------------ZnR9UrbnPykKrj5krnBPTZpf
Content-Type: multipart/mixed;
 boundary="------------kLa7iJUW0ue1vVZHSRG406fl";
 protected-headers="v1"
From: Fabian Toepfer <fabian.toepfer@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: ubuntu-security-announce@lists.ubuntu.com
Message-ID: <55279c62-da5c-4e3e-a14e-0949acca824c@canonical.com>
Subject: [USN-6678-1] libgit2 vulnerabilities

--------------kLa7iJUW0ue1vVZHSRG406fl
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: base64

==========================================================================
Ubuntu Security Notice USN-6678-1
March 05, 2024

libgit2 vulnerabilities
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

Several security issues were fixed in libgit2.

Software Description:
- libgit2: Portable C implementation of the Git core methods library

Details:

It was discovered that libgit2 mishandled equivalent filenames on NTFS
partitions. If a user or automated system were tricked into cloning a
specially crafted repository, an attacker could possibly use this issue to
execute arbitrary code. This issue only affected Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2020-12278, CVE-2020-12279)

It was discovered that libgit2 did not perform certificate checking by
default. An attacker could possibly use this issue to perform a
machine-in-the-middle attack. This issue only affected Ubuntu 16.04 LTS,
Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 22.04 LTS. (CVE-2023-22742)

It was discovered that libgit2 could be made to run into an infinite loop.
An attacker could possibly use this issue to cause a denial of service.
This issue only affected Ubuntu 23.10. (CVE-2024-24575)

It was discovered that libgit2 did not properly manage memory. An attacker
could possibly use this issue to cause a denial of service or execute
arbitrary code. (CVE-2024-24577)

Update instructions:

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

Ubuntu 23.10:
   libgit2-1.5                     1.5.1+ds-1ubuntu1.1

Ubuntu 22.04 LTS:
   libgit2-1.1                     1.1.0+dfsg.1-4.1ubuntu0.1

Ubuntu 20.04 LTS:
   libgit2-28                      0.28.4+dfsg.1-2ubuntu0.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   libgit2-26                      0.26.0+dfsg.1-1.1ubuntu0.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   libgit2-24                      0.24.1-2ubuntu0.2+esm2

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

References:
   https://ubuntu.com/security/notices/USN-6678-1
   CVE-2020-12278, CVE-2020-12279, CVE-2023-22742, CVE-2024-24575,
   CVE-2024-24577

Package Information:
   https://launchpad.net/ubuntu/+source/libgit2/1.5.1+ds-1ubuntu1.1
https://launchpad.net/ubuntu/+source/libgit2/1.1.0+dfsg.1-4.1ubuntu0.1
https://launchpad.net/ubuntu/+source/libgit2/0.28.4+dfsg.1-2ubuntu0.1

--------------kLa7iJUW0ue1vVZHSRG406fl--

--------------ZnR9UrbnPykKrj5krnBPTZpf
Content-Type: application/pgp-signature; name="OpenPGP_signature.asc"
Content-Description: OpenPGP digital signature
Content-Disposition: attachment; filename="OpenPGP_signature.asc"

-----BEGIN PGP SIGNATURE-----
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=0VCq
-----END PGP SIGNATURE-----

--------------ZnR9UrbnPykKrj5krnBPTZpf--


--===============3032079738506643170==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: base64
Content-Disposition: inline

Cg==

--===============3032079738506643170==--