Critical Remote Code Execution Vulnerability in libvorbis - CVE-2017-14632
Summary
ALPINE-CVE-2017-14632: Xiph.Org libvorbis 1.3.5 allows Remote Code Execution upon freeing uninitialized memory in the function vorbis_analysis_headerout() in info.c when vi->channels. Affects libvorbis versions < 1.3.5-r4. Fixed in 1.3.5-r4. How to fix ↓
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Background
libvorbis is an open-source audio compression library developed by the Xiph.Org Foundation. It is widely used for encoding and decoding audio streams in various applications. The library is known for its high-quality audio output and efficient compression algorithms. However, it has been identified to have a critical vulnerability that can lead to remote code execution, particularly when handling uninitialized memory.
Vulnerability Detail
The vulnerability, identified as CVE-2017-14632, arises from a flaw in the function vorbis_analysis_headerout() within the libvorbis library. When the number of channels (vi->channels) is less than or equal to zero, the function may attempt to free uninitialized memory. This can lead to remote code execution, allowing an attacker to execute arbitrary code on the affected system. The severity of this vulnerability is underscored by its CVSS score of 9.8, indicating a critical risk to systems utilizing this library.
How To Fix
Minimum fixed version
1.3.5-r4
This is the first release that contains the fix.
sudo apk add --upgrade libvorbisTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not feasible, consider implementing input validation to ensure that the number of channels is always greater than zero before invoking the vorbis_analysis_headerout() function. This can help mitigate the risk until the package is updated.
Conclusion
The CVE-2017-14632 vulnerability in libvorbis poses a significant risk due to its potential for remote code execution. It is crucial for users of the library to update to the patched version to mitigate this risk. Additionally, implementing workarounds can provide temporary relief until the update is applied.
See every vulnerability recorded for libvorbis →
FAQ
CVE-2017-14632 is a critical vulnerability in the libvorbis library that allows remote code execution due to improper handling of uninitialized memory.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
The CVSS score for CVE-2017-14632 is 9.8, indicating a critical level of risk.
Implement input validation to ensure that the number of channels is greater than zero before calling the vulnerable function as a temporary workaround.
More information about libvorbis can be found on the official Xiph.Org website, which provides documentation and resources related to the library.
References
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