OSV-2020-2062 Heap-buffer-overflow in WelsDec::WelsDecodeMbCabacISliceBaseMode0
A heap buffer overflow in the OpenH264 decoder allows attackers to execute arbitrary code or cause denial of service via crafted video files.
- 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-2020-2062?
OSV-2020-2062 is a memory corruption vulnerability in openh264, published on 14 Oct 2020. 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=26303
Crash type: Heap-buffer-overflow WRITE 4
Crash state:
WelsDec::WelsDecodeMbCabacISliceBaseMode0
WelsDec::WelsDecodeMbCabacISlice
WelsDec::WelsDecodeSlice
Which versions are affected by OSV-2020-2062?
1 open source package ship an affected version, including openh264.
| Package | Affected | Fixed in |
|---|---|---|
openh264 OSS-Fuzz | All versions | None |
How do I fix OSV-2020-2062?
No fix has been published for OSV-2020-2062 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-2020-2062 being exploited?
There is no known exploitation of OSV-2020-2062 in the wild and no public exploit code.