Heap Buffer Overflow Vulnerability in Perl Package
Summary
ALPINE-CVE-2024-56406: A heap buffer overflow vulnerability was discovered in Perl. Affects perl versions < 5.36.2-r1. Fixed in 5.36.2-r1. How to fix ↓
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Background
Perl is a high-level, general-purpose programming language known for its flexibility and capability in text processing, system administration, web development, and network programming. It is widely used due to its rich ecosystem of modules and libraries. However, certain versions of Perl have been found to be vulnerable to a heap buffer overflow, which can lead to severe security issues.
Vulnerability Detail
A heap buffer overflow vulnerability was discovered in Perl, affecting release branches 5.34, 5.36, 5.38, and 5.40, including development versions from 5.33.1 through 5.41.10. The vulnerability arises when non-ASCII bytes are present in the left-hand side of the 'tr' operator, causing the function S_do_trans_invmap to overflow the destination pointer 'd'. This can lead to a segmentation fault and potentially allow for Denial of Service (DoS) attacks or even code execution on systems lacking adequate defenses.
How To Fix
Minimum fixed version
5.36.2-r1
This is the first release that contains the fix.
sudo apk add --upgrade perlTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, avoid using the 'tr' operator with non-ASCII bytes on the left-hand side until the package can be updated.
Conclusion
The heap buffer overflow vulnerability in Perl poses significant risks, including potential Denial of Service and code execution attacks. It is crucial for users of affected versions to update their packages promptly to mitigate these risks. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
A heap buffer overflow occurs when a program writes more data to a buffer located on the heap than it can hold, potentially corrupting adjacent memory and leading to unpredictable behavior.
Exploiting this vulnerability could lead to Denial of Service attacks or allow an attacker to execute arbitrary code, compromising the security of your application.
The affected versions include Perl release branches 5.34, 5.36, 5.38, and 5.40, as well as development versions from 5.33.1 through 5.41.10.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. By simply uploading your manifest file like package-lock.json, you can check for vulnerabilities in real-time.
If immediate updates are not possible, avoid using the vulnerable features of Perl, such as the 'tr' operator with non-ASCII bytes, until you can apply the necessary updates.
References
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