Integer Overflow in Expat (libexpat) before 2.4.3
Summary
CVE-2022-22827: storeAtts in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow. Affects expat across 2 version ranges.
< 2.2.10-r0
< 57c7da69b78e3698e112a6b5da19d5109b8232d1
Fixed in 2.2.10-r0. How to fix ↓
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Background
Expat (aka libexpat) is an open-source XML parsing library that is widely used in various applications. It provides a set of functions and APIs for parsing XML documents. Expat is vulnerable to an integer overflow in the storeAtts function in xmlparse.c, which can lead to security issues.
Vulnerability Detail
The vulnerability (CVE-2022-22827) arises from an integer overflow in the storeAtts function of Expat. This can be exploited by an attacker to cause a heap-based buffer overflow, potentially leading to arbitrary code execution or denial of service. The issue has a CVSSv3 score of 8.8, indicating a high severity level.
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
There is no known workaround for this vulnerability. It is essential to update to the fixed version of Expat to mitigate the risk.
Conclusion
The integer overflow vulnerability in Expat (libexpat) before version 2.4.3 can lead to arbitrary code execution or denial of service. It is crucial to update the Expat library to the fixed version and recompile the affected applications to mitigate the risk. For further support on vulnerability remediation, contact DevNack.com.
See every vulnerability recorded for expat →
FAQ
Expat (libexpat) is an open-source XML parsing library used in various applications for processing XML documents.
The vulnerability can allow an attacker to execute arbitrary code or cause denial of service by exploiting the integer overflow in Expat.
To fix this vulnerability, update the Expat library to version 2.4.3 or later and recompile the affected applications.
No, there is no known workaround for this vulnerability. Updating to the fixed version is the recommended solution.
The CVSSv3 score of this vulnerability is 8.8, indicating a high severity level.
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