Vulnerability in libxml2 - Denial of Service via Application Crash
Summary
DLA-2653-1: libxml2 - security update. Affects libxml2 versions < 2.9.4+dfsg1-2.2+deb9u4. Fixed in 2.9.4+dfsg1-2.2+deb9u4. How to fix ↓
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Background
libxml2 is a library that provides support for reading, modifying, and writing XML and HTML files. It is widely used in various applications and systems. However, a vulnerability has been discovered in libxml2 that could potentially lead to a denial of service (DoS) attack. This vulnerability affects the Debian 9 stretch version of libxml2.
Vulnerability Detail
The vulnerability in libxml2 arises from several issues that could cause a DoS attack when parsing specially crafted files. These issues have been addressed in version 2.9.4+dfsg1-2.2+deb9u4 of libxml2. The exact technical details and potential ramifications of the vulnerability are documented in the related CVEs: CVE-2021-3516, CVE-2021-3517, CVE-2021-3518, and CVE-2021-3537.
How To Fix
Minimum fixed version
2.9.4+dfsg1-2.2+deb9u4
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libxml2Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no specific workaround mentioned for this vulnerability. The recommended solution is to apply the security update as mentioned in the 'how_to_fix' section.
Conclusion
In conclusion, a vulnerability has been discovered in libxml2 that could lead to a denial of service (DoS) attack. It is recommended to upgrade your libxml2 packages to the fixed version mentioned in this advisory. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for libxml2 →
FAQ
libxml2 is a library that provides support for reading, modifying, and writing XML and HTML files. It is widely used in various applications and systems.
A denial of service (DoS) attack is an attempt to make a computer or network resource unavailable to its intended users by overwhelming it with a flood of illegitimate requests or other malicious activities.
This vulnerability affects the libxml2 package in Debian 9 stretch. If left unpatched, it could potentially lead to a denial of service (DoS) attack on systems running this version of libxml2.
There are no known exploits for this vulnerability at the time of this advisory. However, it is always recommended to apply security updates promptly to mitigate any potential risks.
You can find more information about this vulnerability, including the detailed security status of libxml2, on the Debian security tracker page for libxml2: https://security-tracker.debian.org/tracker/libxml2
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