Vulnerability in Expat (libexpat) Package - CVE-2022-25235
Summary
CVE-2022-25235: xmltok_impl.c in Expat (aka libexpat) before 2.4.5 lacks certain validation of encoding, such as checks for whether a UTF-8 character is valid in a certain context. 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
The Expat (libexpat) package is an open-source XML parsing library that is widely used in various applications. It provides functionality for parsing XML documents and extracting data from them. The package is an integral part of the Alpine Linux distribution, specifically versions 3.12 to 3.18. However, it has been discovered that the package is vulnerable to CVE-2022-25235, which can lead to potential security issues.
Vulnerability Detail
CVE-2022-25235 is a vulnerability in the Expat (libexpat) package that exists in versions prior to 2.4.5. The vulnerability arises from a lack of certain encoding validation checks in the xmltok_impl.c file. Specifically, the package fails to validate whether a UTF-8 character is valid in a given context. This can potentially allow an attacker to exploit the vulnerability and execute arbitrary code or perform other malicious actions. The severity of this vulnerability is rated as critical with a CVSS score of 9.8.
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 update the Expat (libexpat) package to the fixed version as soon as possible.
Conclusion
In conclusion, the Expat (libexpat) package is vulnerable to CVE-2022-25235, which can lead to potential security risks. It is crucial to update the package to version 2.4.5 or later to mitigate the vulnerability and enhance the security of the system or application. For further support and assistance in vulnerability remediation, you can contact DevNack.com.
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FAQ
The vulnerability can allow an attacker to execute arbitrary code or perform other malicious actions, potentially leading to a compromise of the affected system or application.
Versions prior to 2.4.5 of the Expat (libexpat) package are affected. This includes versions in the Alpine Linux distribution from 3.12 to 3.18.
No, there is no known workaround for this vulnerability. Updating the Expat (libexpat) package to the fixed version is the recommended solution.
To update the Expat (libexpat) package, you can use the package manager of your operating system or distribution. For Alpine Linux, you can use the 'apk' package manager and install the fixed version (2.4.5 or later) of the package.
You can find more information about this vulnerability, including technical details and the CVE identifier (CVE-2022-25235), in the National Vulnerability Database (NVD) or the Expat (libexpat) package's official documentation.
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