OSV-2020-1042 Heap-use-after-free in WelsDec::MapColToList0
A heap-use-after-free vulnerability 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-2020-1042?
OSV-2020-1042 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=14267
Crash type: Heap-use-after-free READ 4
Crash state:
WelsDec::MapColToList0
WelsDec::PredBDirectTemporal
WelsDec::WelsDecodeMbCavlcBSlice
Which versions are affected by OSV-2020-1042?
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-2020-1042?
No fix has been published for OSV-2020-1042 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-2020-1042 being exploited?
There is no known exploitation of OSV-2020-1042 in the wild and no public exploit code.