OSV-2020-319 Use-of-uninitialized-value in inv_txfm2d_add_facade
An attacker can cause a denial of service in AV1 video decoding by triggering a use-of-uninitialized-value error in the inverse transform function.
- 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-2020-319?
OSV-2020-319 is an use after free vulnerability in libaom, 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=12552
Crash type: Use-of-uninitialized-value
Crash state:
inv_txfm2d_add_facade
av1_inv_txfm2d_add_64x64_c
av1_inverse_transform_block
Which versions are affected by OSV-2020-319?
1 open source package ship an affected version, including libaom.
| Package | Affected | Fixed in |
|---|---|---|
libaom OSS-Fuzz | All versions | None |
How do I fix OSV-2020-319?
No fix has been published for OSV-2020-319 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-2020-319 being exploited?
There is no known exploitation of OSV-2020-319 in the wild and no public exploit code.