OSV-2021-916 Use-of-uninitialized-value in jxl::ModularFrameDecoder::DecodeAcMetadata
An attacker can cause a denial of service in applications using the JPEG XL library by triggering a use-of-uninitialized-value error during metadata decoding.
- 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-2021-916?
OSV-2021-916 is an use after free vulnerability in libjxl, published on 4 Jul 2021. 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=35778
Crash type: Use-of-uninitialized-value
Crash state:
jxl::ModularFrameDecoder::DecodeAcMetadata
jxl::FrameDecoder::ProcessDCGroup
jxl::ThreadPool::RunCallState<jxl::Status
Which versions are affected by OSV-2021-916?
1 open source package ship an affected version, including libjxl.
| Package | Affected | Fixed in |
|---|---|---|
libjxl OSS-Fuzz | All versions | None |
How do I fix OSV-2021-916?
No fix has been published for OSV-2021-916 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-2021-916 being exploited?
There is no known exploitation of OSV-2021-916 in the wild and no public exploit code.