OSV-2021-422 Heap-use-after-free in frame_get_lazychunk
A heap-use-after-free vulnerability in the Blosc2 library allows attackers to potentially execute arbitrary code or cause a denial of service via crafted compressed data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2021-422?
OSV-2021-422 is an use after free vulnerability in c-blosc2, published on 20 Feb 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=31120
Crash type: Heap-use-after-free READ 4
Crash state:
frame_get_lazychunk
frame_decompress_chunk
blosc2_schunk_decompress_chunk
Which versions are affected by OSV-2021-422?
1 open source package ship an affected version, including c-blosc2.
| Package | Affected | Fixed in |
|---|---|---|
c-blosc2 OSS-Fuzz | All versions | None |
How do I fix OSV-2021-422?
No fix has been published for OSV-2021-422 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2021-422 being exploited?
There is no known exploitation of OSV-2021-422 in the wild and no public exploit code.