CVE-2024-24577

Name	CVE-2024-24577
Description	libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Using well-crafted inputs to `git_index_add` can cause heap corruption that could be leveraged for arbitrary code execution. There is an issue in the `has_dir_name` function in `src/libgit2/index.c`, which frees an entry that should not be freed. The freed entry is later used and overwritten with potentially bad actor-controlled data leading to controlled heap corruption. Depending on the application that uses libgit2, this could lead to arbitrary code execution. This issue has been patched in version 1.6.5 and 1.7.2.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-3742-1, DSA-5619-1
Debian Bugs	1063416

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libgit2 (PTS)	buster	0.27.7+dfsg.1-0.2	vulnerable
	buster (security)	0.27.7+dfsg.1-0.2+deb10u2	fixed
	bullseye	1.1.0+dfsg.1-4+deb11u1	vulnerable
	bullseye (security)	1.1.0+dfsg.1-4+deb11u2	fixed
	bookworm	1.5.1+ds-1	vulnerable
	bookworm (security)	1.5.1+ds-1+deb12u1	fixed
	sid, trixie	1.7.2+ds-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
libgit2	source	buster	0.27.7+dfsg.1-0.2+deb10u2	DLA-3742-1
libgit2	source	bullseye	1.1.0+dfsg.1-4+deb11u2	DSA-5619-1
libgit2	source	bookworm	1.5.1+ds-1+deb12u1	DSA-5619-1
libgit2	source	(unstable)	1.7.2+ds-1		1063416

Notes

https://github.com/libgit2/libgit2/security/advisories/GHSA-j2v7-4f6v-gpg8
Fixed by: https://github.com/libgit2/libgit2/commit/eb4c1716cd92bf56f2770653a915d5fc01eab8f3 (v1.6.5)
Fixed by: https://github.com/libgit2/libgit2/commit/487af0cf6687dc48b0a960fa2f39894e2d84d77b (v1.7.2)