Buffer Over-read Vulnerability in libsndfile: Denial of Service Risk
Summary
ALPINE-CVE-2018-19661: An issue was discovered in libsndfile 1.0.28. There is a buffer over-read in the function i2ulaw_array in ulaw.c that will lead to a denial of service. Affects libsndfile versions < 1.0.28-r6. Fixed in 1.0.28-r6. How to fix ↓
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Background
libsndfile is a widely-used library for reading and writing files containing sampled sound through various formats. It provides a simple API for audio file manipulation and is essential for applications that require audio processing. However, the library has been found to be vulnerable to a buffer over-read issue, which can lead to potential denial of service attacks, affecting the stability and reliability of applications that depend on it.
Vulnerability Detail
An issue was discovered in libsndfile version 1.0.28, specifically in the function i2ulaw_array located in ulaw.c. This vulnerability allows for a buffer over-read, which can lead to a denial of service. Attackers may exploit this flaw to manipulate audio files in a way that causes the application to crash or behave unexpectedly, thereby compromising the user experience and application integrity.
How To Fix
Minimum fixed version
1.0.28-r6
This is the first release that contains the fix.
sudo apk add --upgrade libsndfileTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not feasible, consider implementing input validation to ensure that audio files processed by the application do not trigger the vulnerability. This can help mitigate the risk until the package is updated.
Conclusion
The buffer over-read vulnerability in libsndfile poses a significant risk of denial of service, impacting applications that rely on this library for audio processing. It is crucial to update to the patched version to ensure application stability and security. Regular monitoring and validation of dependencies can help prevent similar vulnerabilities in the future.
See every vulnerability recorded for libsndfile →
FAQ
The CVSS score of this vulnerability is 6.5, indicating a medium severity level.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.
The potential consequences include application crashes and denial of service, which can disrupt user experience and application functionality.
Yes, version 1.0.28-r6 and later are patched versions that resolve this vulnerability.
If you cannot update the package immediately, implement input validation to mitigate the risk of exploitation until you can apply the patch.
References
Related vulnerabilities
Recent vulnerabilities recorded for libsndfile.
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