Bug 2263095 (CVE-2024-24577)

Summary:	CVE-2024-24577 libgit2: arbitrary code execution due to heap corruption in git_index_add
Product:	[Other] Security Response	Reporter:	Robb Gatica <rgatica>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	bodavis, emachado, ganandan, jchecahi, jistone, mnewsome, sipoyare, tstellar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libgit2 1.6.5, libgit2 1.7.2	Doc Type:	---
Doc Text:	A flaw was found in libgit2, a cross-platform, linkable library implementation of Git. A specially crafted payload to git_index_add can cause heap corruption that could be leveraged for arbitrary code execution. The attacker must be able to trigger two consecutive calls to git_index_add with a filename that starts with a / character to exploit this vulnerability. To control the heap corruption, the attacker must be able to control the ctime field of the git_index_entry data structure.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2263096, 2263097, 2263098, 2263099, 2263100
Bug Blocks:	2263090

Description Robb Gatica 2024-02-07 00:47:24 UTC

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.

https://github.com/libgit2/libgit2/releases/tag/v1.6.5
https://github.com/libgit2/libgit2/releases/tag/v1.7.2
https://github.com/libgit2/libgit2/security/advisories/GHSA-j2v7-4f6v-gpg8

Comment 1 Robb Gatica 2024-02-07 00:52:58 UTC

Created libgit2 tracking bugs for this issue:

Affects: fedora-all [bug 2263096]


Created rust tracking bugs for this issue:

Affects: epel-all [bug 2263098]
Affects: fedora-all [bug 2263099]


Created rust-libgit2-sys tracking bugs for this issue:

Affects: fedora-all [bug 2263100]