OSV-2020-692 Heap-use-after-free in WelsDec::SetUnRef
A heap-use-after-free vulnerability in the OpenH264 decoder allows attackers to execute arbitrary code or cause denial of service via crafted media 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-2020-692?
OSV-2020-692 is an use after free vulnerability in openh264, published on 1 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=18458
Crash type: Heap-use-after-free WRITE 1
Crash state:
WelsDec::SetUnRef
WelsDec::SlidingWindow
WelsDec::WelsMarkAsRef
Which versions are affected by OSV-2020-692?
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-2020-692?
No fix has been published for OSV-2020-692 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-2020-692 being exploited?
There is no known exploitation of OSV-2020-692 in the wild and no public exploit code.