Integer Overflow in Expat (libexpat) - CVE-2022-25314
Summary
CVE-2022-25314: In Expat (aka libexpat) before 2.4.5, there is an integer overflow in copyString. Affects expat across 2 version ranges.
< 2.2.10-r2
< 97a4840578693a346e79302909b67d97492e1880
Fixed in 2.2.10-r2. How to fix ↓
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Background
Expat (libexpat) is an open-source XML parsing library that is widely used in various applications and programming languages. It provides a set of functions and APIs for parsing XML documents. The library is known for its simplicity, efficiency, and cross-platform compatibility. However, a vulnerability has been discovered in Expat that could lead to an integer overflow.
Vulnerability Detail
The vulnerability, identified as CVE-2022-25314, is an integer overflow in the copyString function of Expat. This vulnerability occurs when copying a string with a length that exceeds the maximum value that can be represented by an integer. An attacker could exploit this vulnerability by crafting a malicious XML document that triggers the integer overflow, potentially leading to a heap-based buffer overflow or other memory corruption issues. This could result in remote code execution or denial of service attacks.
How To Fix
Minimum fixed version
2.2.10-r2
This is the first release that contains the fix.
sudo apk add --upgrade expatTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to apply the official patch or update the Expat library to the latest version as soon as possible.
Conclusion
The integer overflow vulnerability in Expat (libexpat) can have severe consequences, including remote code execution and denial of service attacks. It is crucial to update the Expat library to the latest version (2.4.5 or later) to mitigate this vulnerability. Regularly checking for updates and staying informed about security advisories is essential to ensure the continued security of applications using Expat.
See every vulnerability recorded for expat →
FAQ
Expat (libexpat) is an open-source XML parsing library used for processing XML documents in various applications and programming languages.
This vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial of service by exploiting the integer overflow in Expat.
To fix this vulnerability, update the Expat library to version 2.4.5 or later, as it contains a patch for this issue.
No, there are no known workarounds for this vulnerability. It is crucial to update the Expat library to the latest version.
You can find more information about this vulnerability in the CVE-2022-25314 JSON report available at the following source: https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-25314.json
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