Critical Vulnerability in libtheora: Invalid Negative Left Shift in Huffman Decoder
Summary
UBUNTU-CVE-2024-56431: oc_huff_tree_unpack in huffdec.c in libtheora in Theora through 1.0 7180717 has an invalid negative left shift. Affects libtheora versions < 1.2.0~alpha1+dfsg-6. Fixed in 1.2.0~alpha1+dfsg-6. How to fix ↓
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Background
libtheora is a library for encoding and decoding Theora video streams, widely used in multimedia applications. It provides essential functionalities for video compression and playback, making it a critical component in various software packages. The library has been identified to have a vulnerability that could potentially affect its stability and security.
Vulnerability Detail
The vulnerability, identified as CVE-2024-56431, is located in the oc_huff_tree_unpack function within huffdec.c of libtheora versions up to 1.0 7180717. It involves an invalid negative left shift, which could lead to unexpected behavior. Although this issue is disputed by some parties due to a lack of evidence indicating a security impact, it is essential to address it to ensure the integrity of applications relying on this library.
How To Fix
Minimum fixed version
1.2.0~alpha1+dfsg-6
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libtheoraTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
Currently, there are no specific workarounds mentioned for this vulnerability. However, users are advised to monitor their applications for any unusual behavior and apply the patch as soon as it is available.
Conclusion
The CVE-2024-56431 vulnerability in libtheora presents a potential risk to applications utilizing this library. It is crucial for users to update to the patched version to ensure the security and stability of their software. Monitoring tools like Vulert can assist in identifying vulnerabilities in real-time.
See every vulnerability recorded for libtheora →
FAQ
CVE-2024-56431 is a vulnerability in the libtheora library that involves an invalid negative left shift in the Huffman decoder.
While the vulnerability is disputed regarding its impact, it could potentially lead to unexpected behavior in applications that utilize the libtheora library.
Yes, a patched version of the libtheora library (1.2.0~alpha1+dfsg-6) is available. Users should update to this version to mitigate the risk.
If an immediate update is not possible, monitor your applications for any unusual behavior and consider using alternative libraries until the update can be applied.
You can use Vulert, which allows you to monitor and alert for open-source vulnerabilities in your software using just a manifest file like package-lock.json. You can check your application at the Vulert playground without any signup.
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