Critical Integer Overflow Vulnerability in Expat Package
Summary
ALPINE-CVE-2022-22822: addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. Affects expat versions < 2.2.10-r0. Fixed in 2.2.10-r0. How to fix ↓
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Background
Expat is a widely used XML parsing library that enables applications to read and process XML data efficiently. It is known for its speed and simplicity, making it a popular choice among developers. However, the library has been found to be vulnerable to an integer overflow issue, which can lead to severe security risks if not addressed promptly.
Vulnerability Detail
The vulnerability, identified as CVE-2022-22822, originates from the addBinding function in xmlparse.c within Expat versions prior to 2.4.3. This integer overflow can be exploited by attackers to manipulate XML data, potentially leading to denial of service or arbitrary code execution. The severity of this vulnerability is underscored by its CVSS score of 9.8, indicating a critical risk level that necessitates immediate attention.
How To Fix
Minimum fixed version
2.2.10-r0
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
If immediate updating is not feasible, consider implementing input validation to sanitize XML data before processing it with Expat. This can help reduce the risk of exploitation until the package is updated.
Conclusion
The integer overflow vulnerability in the Expat package poses a significant risk to applications that utilize this library. It is crucial to update to the patched versions to safeguard against potential exploits. Regular monitoring and vulnerability assessments, such as those provided by Vulert, can help maintain the security of your software.
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FAQ
CVE-2022-22822 is a critical integer overflow vulnerability found in the Expat XML parsing library, affecting versions prior to 2.4.3.
Exploitation of this vulnerability can lead to denial of service or arbitrary code execution, compromising the security of your application.
The CVSS score for CVE-2022-22822 is 9.8, indicating a critical risk level.
You can use the Vulert platform to check if your application is affected by this vulnerability by analyzing your manifest file.
Vulert is a tool that monitors and alerts in real-time for open-source vulnerabilities in software by using a manifest file like package-lock.json.
References
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