OSV-2020-1250 Heap-use-after-free in WelsDec::MapColToList0
A heap-use-after-free vulnerability in the OpenH264 decoder allows attackers to cause denial of service or potentially execute code 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-2020-1250?
OSV-2020-1250 is an use after free vulnerability in openh264, published on 22 Jul 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=13185
Crash type: Heap-use-after-free READ 4
Crash state:
WelsDec::MapColToList0
WelsDec::ParseInterBMotionInfoCabac
WelsDec::WelsDecodeMbCabacBSliceBaseMode0
Which versions are affected by OSV-2020-1250?
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-2020-1250?
No fix has been published for OSV-2020-1250 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-2020-1250 being exploited?
There is no known exploitation of OSV-2020-1250 in the wild and no public exploit code.