Subversion - Null Pointer Dereference in mod_dav_svn
Summary
DSA-3107-1: subversion - security update. Affects subversion versions < 1.6.17dfsg-4+deb7u7. Fixed in 1.6.17dfsg-4+deb7u7. How to fix ↓
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Background
Subversion is a version control system that allows users to track changes in files and directories over time. It is commonly used for managing source code and facilitating collaboration among developers. The mod_dav_svn component of Subversion is responsible for serving repositories with the Apache web server. This vulnerability affects Subversion versions prior to 1.6.17dfsg-4+deb7u7 in the Debian 7 ecosystem.
Vulnerability Detail
A NULL pointer dereference vulnerability was discovered in mod_dav_svn while processing REPORT requests. This vulnerability could be exploited by a remote attacker to cause a denial of service. By sending a specially crafted REPORT request, the attacker can trigger the NULL pointer dereference, leading to a crash of the server and potentially disrupting the availability of the Subversion service.
How To Fix
Minimum fixed version
1.6.17dfsg-4+deb7u7
This is the first release that contains the fix.
sudo apt-get install --only-upgrade subversionTip — 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 apply the security update as soon as possible to mitigate the risk of exploitation.
Conclusion
In conclusion, the Subversion package in the Debian 7 ecosystem is vulnerable to a NULL pointer dereference in the mod_dav_svn component. This vulnerability can be exploited by remote attackers to cause a denial of service. It is crucial to upgrade the subversion package to version 1.6.17dfsg-4+deb7u7 or later to mitigate the risk. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
Subversion is a version control system used for tracking changes in files and directories over time. It is commonly used for managing source code and facilitating collaboration among developers.
mod_dav_svn is a Subversion component that enables the serving of repositories with the Apache web server. It provides the necessary functionality to access and manipulate Subversion repositories over HTTP.
A NULL pointer dereference occurs when a program attempts to access or manipulate memory using a pointer that has not been assigned a valid memory address (i.e., it points to NULL). This can lead to a crash or other unexpected behavior.
An attacker can exploit this vulnerability by sending a specially crafted REPORT request to the mod_dav_svn component. This triggers the NULL pointer dereference, causing the server to crash and potentially disrupting the availability of the Subversion service.
The vulnerability allows a remote attacker to cause a denial of service by crashing the server. This can result in the unavailability of the Subversion service, impacting the ability to manage source code and collaborate effectively.
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