Memory Leak Vulnerability in FLAC Package: CVE-2017-6888
Summary
ALPINE-CVE-2017-6888: An error in the "read_metadata_vorbiscomment_()" function (src/libFLAC/stream_decoder.c) in FLAC version 1.3.2 can be exploited to cause a memory leak via a specially crafted FLAC file. Affects flac versions < 1.3.2-r2. Fixed in 1.3.2-r2. How to fix ↓
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Background
FLAC (Free Lossless Audio Codec) is an audio format for lossless compression of digital audio. It is widely used for high-quality audio storage and playback. The FLAC package in Alpine Linux provides tools for encoding and decoding FLAC files. This package is essential for users who require high-fidelity audio without loss of quality. However, it has been identified that certain versions of the FLAC package are vulnerable to a memory leak issue, which can be exploited through specially crafted FLAC files.
Vulnerability Detail
The vulnerability, identified as CVE-2017-6888, originates from an error in the 'read_metadata_vorbiscomment_()' function located in the src/libFLAC/stream_decoder.c file of FLAC version 1.3.2. This flaw allows an attacker to create a specially crafted FLAC file that, when processed, can lead to a memory leak. The ramifications of this vulnerability include potential denial of service due to excessive memory consumption, which could affect the performance and stability of applications relying on the FLAC package.
How To Fix
Minimum fixed version
1.3.2-r2
This is the first release that contains the fix.
sudo apk add --upgrade flacTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can avoid processing untrusted FLAC files until the package is updated. Additionally, monitoring memory usage during FLAC file processing can help mitigate the impact of this vulnerability.
Conclusion
The CVE-2017-6888 vulnerability in the FLAC package poses a risk of memory leaks when handling specially crafted files. Users are advised to update to the patched version to ensure their systems remain secure. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
CVE-2017-6888 is a vulnerability in the FLAC package that can lead to a memory leak when processing specially crafted FLAC files.
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-2017-6888 is 5.5, indicating a moderate severity level.
If an immediate update is not possible, refrain from processing untrusted FLAC files and monitor memory usage to mitigate risks.
For real-time monitoring and alerts for open-source vulnerabilities, you can visit Vulert at https://vulert.com.
References
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