OSV-2020-1855 Heap-buffer-overflow in WelsDec::UpdateP16x16MotionInfo
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
- Not needed
- Fix
- None listed
What is OSV-2020-1855?
OSV-2020-1855 is a memory corruption vulnerability in openh264, published on 27 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25961
Crash type: Heap-buffer-overflow WRITE 4
Crash state:
WelsDec::UpdateP16x16MotionInfo
WelsDec::ParseInterPMotionInfoCabac
WelsDec::WelsDecodeMbCabacPSliceBaseMode0
Which versions are affected by OSV-2020-1855?
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-2020-1855?
No fix has been published for OSV-2020-1855 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-2020-1855 being exploited?
There is no known exploitation of OSV-2020-1855 in the wild and no public exploit code.