Denial of Service Vulnerability in libxml2
Summary
DSA-3057-1: libxml2 - security update. Affects libxml2 versions < 2.8.0+dfsg1-7+wheezy2. Fixed in 2.8.0+dfsg1-7+wheezy2. 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 programming languages. However, a vulnerability has been discovered in libxml2 that could allow a remote attacker to cause a denial of service (DoS) by consuming excessive CPU resources. This vulnerability affects the Debian 7 (wheezy) distribution.
Vulnerability Detail
The vulnerability, identified as CVE-2014-3660, is caused by a flaw in libxml2's XML parsing functionality. An attacker can exploit this flaw by providing a specially crafted XML file to an application that uses libxml2. When the XML file is processed, the application may experience excessive CPU consumption due to excessive entity substitutions, even if entity substitution is disabled (which is the default behavior of the parser). This can lead to a DoS condition, rendering the affected application unresponsive.
How To Fix
Minimum fixed version
2.8.0+dfsg1-7+wheezy2
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. However, as a general best practice, it is recommended to ensure that all software components, including libxml2, are kept up to date with the latest security patches to minimize the risk of exploitation.
Conclusion
The libxml2 library is vulnerable to a denial of service (DoS) attack due to a flaw in its XML parsing functionality. To mitigate this vulnerability, it is crucial to update the libxml2 package to the fixed version. Regularly updating software components and applying security patches is essential to maintain the security of your system. For further assistance or support in vulnerability remediation, you can reach out to 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 programming languages.
This vulnerability can be exploited by a remote attacker to cause a denial of service (DoS) by consuming excessive CPU resources. This can render the affected application unresponsive.
The vulnerability affects libxml2 version 2.8.0+dfsg1-7+wheezy1 and earlier versions in the Debian 7 (wheezy) distribution.
There is no specific workaround mentioned for this vulnerability. It is recommended to keep all software components, including libxml2, up to date with the latest security patches.
You can update the libxml2 package by using the package manager of your operating system. For the Debian 7 (wheezy) distribution, upgrading to version 2.8.0+dfsg1-7+wheezy2 will fix the vulnerability.
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