Heap-Based Buffer Overflow in libarchive: CVE-2016-1541
Summary
ALPINE-CVE-2016-1541: Heap-based buffer overflow in the zip_read_mac_metadata function in archive_read_support_format_zip.c in libarchive before 3.2.0 allows remote attackers to execute arbitrary code via crafted entry-size values in a ZIP ar... Affects libarchive versions < 3.2.0-r0. Fixed in 3.2.0-r0. How to fix ↓
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Background
libarchive is a widely used library that provides a flexible and efficient way to read and write various archive formats, including ZIP, TAR, and others. It is designed to handle different types of file archives seamlessly, making it a crucial component in many software applications. However, prior to version 3.2.0, libarchive was susceptible to a serious vulnerability that could allow attackers to exploit the library through crafted ZIP files.
Vulnerability Detail
The vulnerability, identified as CVE-2016-1541, is a heap-based buffer overflow that occurs in the zip_read_mac_metadata function within the archive_read_support_format_zip.c file of libarchive versions before 3.2.0. This flaw allows remote attackers to execute arbitrary code on the affected system by supplying specially crafted entry-size values in a ZIP archive. The potential ramifications include unauthorized access, data corruption, and complete system compromise, making it a critical security issue.
How To Fix
Minimum fixed version
3.2.0-r0
This is the first release that contains the fix.
sudo apk add --upgrade libarchiveTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate patching is not feasible, consider avoiding the use of libarchive for processing untrusted ZIP files until the library is updated. Additionally, implement strict input validation to mitigate the risk of exploitation.
Conclusion
CVE-2016-1541 represents a significant security risk for applications utilizing libarchive versions prior to 3.2.0. It is crucial for developers and system administrators to update to the patched version to safeguard against potential exploits. Utilizing tools like Vulert can help in monitoring and managing vulnerabilities effectively.
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FAQ
CVE-2016-1541 is a vulnerability in libarchive that allows remote attackers to execute arbitrary code via crafted ZIP files due to a heap-based buffer overflow.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor for open-source vulnerabilities without requiring any signup.
The CVSS score for CVE-2016-1541 is 8.8, indicating a high severity level.
If you cannot update libarchive right away, avoid processing untrusted ZIP files and implement strict input validation as a temporary measure.
More information about libarchive can be found on its official website or through its documentation, which provides insights into its features and usage.
References
Related vulnerabilities
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