Amazon Linux 2023: CVE-2022-41903: Important priority package update for git

Amazon Linux 2023: CVE-2022-41903: Important priority package update for git

Severity

10

CVSS

(AV:N/AC:L/Au:N/C:C/I:C/A:C)

Published

01/17/2023

Created

02/14/2025

Added

02/14/2025

Modified

02/14/2025

Description

Git is distributed revision control system. `git log` can display commits in an arbitrary format using its `--format` specifiers. This functionality is also exposed to `git archive` via the `export-subst` gitattribute. When processing the padding operators, there is a integer overflow in `pretty.c::format_and_pad_commit()` where a `size_t` is stored improperly as an `int`, and then added as an offset to a `memcpy()`. This overflow can be triggered directly by a user running a command which invokes the commit formatting machinery (e.g., `git log --format=...`). It may also be triggered indirectly through git archive via the export-subst mechanism, which expands format specifiers inside of files within the repository during a git archive. This integer overflow can result in arbitrary heap writes, which may result in arbitrary code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. Users who are unable to upgrade should disable `git archive` in untrusted repositories. If you expose git archive via `git daemon`, disable it by running `git config --global daemon.uploadArch false`. A flaw was found in Git, a distributed revision control system. This issue occurs due to an integer overflow in `pretty.c::format_and_pad_commit()`, where a `size_t` is stored improperly as an `int`, and then added as an offset to a `memcpy()`. This overflow can be triggered directly by a user running a command which invokes the commit formatting machinery (e.g., `git log --format=...`). It may also be triggered indirectly through the git archive via the export-subst mechanism, which expands format specifiers inside files within the repository during a git archive. This integer overflow can result in arbitrary heap writes, which may allow arbitrary code execution.

Solution(s)

• amazon-linux-2023-upgrade-git
• amazon-linux-2023-upgrade-git-all
• amazon-linux-2023-upgrade-git-core
• amazon-linux-2023-upgrade-git-core-debuginfo
• amazon-linux-2023-upgrade-git-core-doc
• amazon-linux-2023-upgrade-git-credential-libsecret
• amazon-linux-2023-upgrade-git-credential-libsecret-debuginfo
• amazon-linux-2023-upgrade-git-cvs
• amazon-linux-2023-upgrade-git-daemon
• amazon-linux-2023-upgrade-git-daemon-debuginfo
• amazon-linux-2023-upgrade-git-debuginfo
• amazon-linux-2023-upgrade-git-debugsource
• amazon-linux-2023-upgrade-git-email
• amazon-linux-2023-upgrade-git-gui
• amazon-linux-2023-upgrade-git-instaweb
• amazon-linux-2023-upgrade-gitk
• amazon-linux-2023-upgrade-git-p4
• amazon-linux-2023-upgrade-git-subtree
• amazon-linux-2023-upgrade-git-svn
• amazon-linux-2023-upgrade-gitweb
• amazon-linux-2023-upgrade-perl-git
• amazon-linux-2023-upgrade-perl-git-svn

References

• https://attackerkb.com/topics/cve-2022-41903
• CVE - 2022-41903
• https://alas.aws.amazon.com/AL2023/ALAS-2023-065.html