OSV-2021-979 Heap-buffer-overflow in stbi__convert_16_to_8
A heap-buffer-overflow in the stb image library allows attackers to cause denial of service or potentially execute code via crafted images.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2021-979?
OSV-2021-979 is a memory corruption vulnerability in stb, published on 13 Jul 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36087
Crash type: Heap-buffer-overflow READ 2
Crash state:
stbi__convert_16_to_8
stbi__load_and_postprocess_8bit
stbi_load_from_memory
Which versions are affected by OSV-2021-979?
1 open source package ship an affected version, including stb.
| Package | Affected | Fixed in |
|---|---|---|
stb OSS-Fuzz | All versions | None |
How do I fix OSV-2021-979?
No fix has been published for OSV-2021-979 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-2021-979 being exploited?
There is no known exploitation of OSV-2021-979 in the wild and no public exploit code.