Heap-buffer-overflow in libgit2
Summary
OSV-2018-3: Heap-buffer-overflow in git__strntol64. Affects libgit2 versions >= a1d5fd0630c6f7e3ac23bc9e13ba33901dfddba4, < 52f859fd534e3c16c2c03b9a2375f00a50f3996e. Fixed in 52f859fd534e3c16c2c03b9a2375f00a50f3996e. How to fix ↓
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Background
libgit2 is an open-source library that provides a low-level API for interacting with Git repositories. It is widely used in various software applications to perform Git operations programmatically. This vulnerability in libgit2 is a heap-buffer-overflow issue that can lead to a crash or potentially allow an attacker to execute arbitrary code.
Vulnerability Detail
The vulnerability occurs in the git__strntol64 function of libgit2. It is triggered when parsing a Git signature, and it results in a heap-buffer-overflow read of 1 byte. This can be exploited by an attacker to read sensitive information from the heap or cause a denial-of-service condition. The vulnerability was reported through the OSS-Fuzz project and has a medium severity rating.
How To Fix
Minimum fixed version
52f859fd534e3c16c2c03b9a2375f00a50f3996e
This is the first release that contains the fix.
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Workaround
There is no specific workaround mentioned for this vulnerability. However, as a general best practice, it is recommended to keep software dependencies up to date and follow secure coding practices to minimize the risk of exploitation.
Conclusion
The heap-buffer-overflow vulnerability in libgit2 can pose a risk to applications that utilize the library for Git operations. It is crucial to update to a fixed version of libgit2 and follow secure coding practices to mitigate the risk. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
libgit2 is an open-source library that provides a low-level API for interacting with Git repositories. It allows developers to perform Git operations programmatically.
A heap-buffer-overflow is a type of memory vulnerability where a program writes or reads data beyond the bounds of a heap-allocated buffer. This can lead to crashes, information leaks, or even code execution.
An attacker can exploit this vulnerability by crafting a malicious Git signature that triggers the heap-buffer-overflow. This can potentially allow them to read sensitive information from the heap or cause a denial-of-service condition.
This vulnerability has a medium severity rating. While it can lead to crashes or potential code execution, it requires a specific set of conditions to be met for exploitation.
To protect your application, it is recommended to update libgit2 to a version that includes the fix. Additionally, following secure coding practices and keeping software dependencies up to date can help minimize the risk of exploitation.
References
Related vulnerabilities
Recent vulnerabilities recorded for libgit2.
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