OSV-2023-56 Heap-buffer-overflow in git_oid_raw_cmp
A heap-buffer overflow in the Git library allows attackers to cause denial of service or potentially execute code via crafted commit graph files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2023-56?
OSV-2023-56 is a memory corruption vulnerability in libgit2, published on 7 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=55724
Crash type: Heap-buffer-overflow READ {*}
Crash state:
git_oid_raw_cmp
commit_graph_parse_oid_lookup
git_commit_graph_file_parse
Which versions are affected by OSV-2023-56?
1 open source package ship an affected version, including libgit2.
| Package | Affected | Fixed in |
|---|---|---|
libgit2 OSS-Fuzz | All versions | None |
How do I fix OSV-2023-56?
No fix has been published for OSV-2023-56 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2023-56 being exploited?
There is no known exploitation of OSV-2023-56 in the wild and no public exploit code.