CVE-2024-24575

Name	CVE-2024-24575
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_revparse_single` can cause the function to enter an infinite loop, potentially causing a Denial of Service attack in the calling application. The revparse function in `src/libgit2/revparse.c` uses a loop to parse the user-provided spec string. There is an edge-case during parsing that allows a bad actor to force the loop conditions to access arbitrary memory. Potentially, this could also leak memory if the extracted rev spec is reflected back to the attacker. As such, libgit2 versions before 1.4.0 are not affected. Users should upgrade to version 1.6.5 or 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)
Debian Bugs	1063415

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libgit2 (PTS)	bullseye (security), bullseye	1.1.0+dfsg.1-4+deb11u2	fixed
	bookworm, bookworm (security)	1.5.1+ds-1+deb12u1	fixed
	sid, trixie	1.8.4+ds-3	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
libgit2	source	buster	(not affected)
libgit2	source	bullseye	(not affected)
libgit2	source	bookworm	1.5.1+ds-1+deb12u1
libgit2	source	(unstable)	1.7.2+ds-1	1063415

Notes

[bullseye] - libgit2 <not-affected> (Vulnerable code introduced later)
[buster] - libgit2 <not-affected> (Vulnerable code introduced later)
https://github.com/libgit2/libgit2/security/advisories/GHSA-54mf-x2rh-hq9v
Introduced by: https://github.com/libgit2/libgit2/commit/add2dabb3c16aa49b33904dcdc07cd915efc12fa (v1.4.0)
Fixed by: https://github.com/libgit2/libgit2/commit/c9d31b711e8906cf248566f43142f20b03e20cbf (v1.6.5)
Fixed by: https://github.com/libgit2/libgit2/commit/7f6f3dff9c41f3be7598693aa3c716c8354fba7f (v1.7.2)