OSV-2020-1127 Use-of-uninitialized-value in WelsDec::CWelsDecoder::ReorderPicturesInDisplay
An attacker can cause a denial of service in the OpenH264 decoder by providing a crafted video file that triggers the use of an uninitialized value.
- 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-2020-1127?
OSV-2020-1127 is an use after free vulnerability in openh264, published on 22 Jul 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=12647
Crash type: Use-of-uninitialized-value
Crash state:
WelsDec::CWelsDecoder::ReorderPicturesInDisplay
WelsDec::CWelsDecoder::DecodeFrame2
WelsDec::CWelsDecoder::DecodeFrameNoDelay
Which versions are affected by OSV-2020-1127?
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-2020-1127?
No fix has been published for OSV-2020-1127 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-2020-1127 being exploited?
There is no known exploitation of OSV-2020-1127 in the wild and no public exploit code.