Integer Overflow in Expat (libexpat) before 2.4.5
Summary
CVE-2022-25315: In Expat (aka libexpat) before 2.4.5, there is an integer overflow in storeRawNames. 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. It provides a set of functions and APIs for parsing XML documents. The library is written in C and is known for its simplicity, efficiency, and portability. However, a vulnerability has been discovered in versions before 2.4.5 that can lead to an integer overflow in the storeRawNames function.
Vulnerability Detail
The integer overflow vulnerability in Expat's storeRawNames function can be exploited by an attacker to cause a heap-based buffer overflow. By supplying a specially crafted XML document, an attacker can trigger the overflow and potentially execute arbitrary code or crash the application. The vulnerability arises due to a lack of proper input validation and bounds checking. The impact of this vulnerability can be severe, as it allows an attacker to gain unauthorized access or disrupt the normal operation of the affected application.
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 crucial to apply the official patch or update to the fixed version as soon as possible.
Conclusion
The integer overflow vulnerability in Expat (libexpat) before version 2.4.5 can have severe consequences, including unauthorized access and application crashes. It is crucial to update to the fixed version or apply the official patch as soon as possible. For further assistance and support in vulnerability remediation, please contact DevNack.com.
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FAQ
Expat (libexpat) is an open-source XML parsing library written in C. It is widely used in various applications for parsing XML documents.
The vulnerability can lead to a heap-based buffer overflow, potentially allowing an attacker to execute arbitrary code or crash the application.
To fix this vulnerability, update to Expat version 2.4.5 or later. Ensure that all dependencies and applications using Expat are also updated.
No, there is no known workaround. It is essential to apply the official patch or update to the fixed version.
The updated version of Expat can be obtained from the official Expat website or through your package manager.
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