Invalid Negative Left Shift Vulnerability in libtheora - CVE-2024-56431
Summary
DEBIAN-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 efficient video compression and playback capabilities, making it a popular choice for developers. However, a vulnerability has been identified in the library that could potentially lead to unexpected behavior under certain conditions.
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 operation, which could lead to undefined behavior. Although the security impact is disputed by third parties, as there is no evidence of application crashes, it is still a potential risk that developers should be aware of.
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
As a workaround, ensure that applications using libtheora are monitored for unusual behavior and consider implementing additional error handling to mitigate potential risks associated with this vulnerability.
Conclusion
The CVE-2024-56431 vulnerability in libtheora presents a potential risk due to an invalid negative left shift operation. While the impact is disputed, it is advisable to update to the patched version to ensure the security and stability of applications using this library.
See every vulnerability recorded for libtheora →
FAQ
CVE-2024-56431 is a vulnerability in the libtheora library that involves an invalid negative left shift operation in the oc_huff_tree_unpack function.
While the vulnerability is disputed in terms of its security impact, it could potentially lead to undefined behavior in applications that utilize the affected version of libtheora.
Yes, the patched version of libtheora is 1.2.0~alpha1+dfsg-6. It is recommended to update to this version to mitigate the vulnerability.
If an immediate update is not possible, monitor your applications for any unusual behavior and consider implementing additional error handling as a temporary measure.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By using the Vulert playground, you can check if your application is affected without needing to sign up.
References
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