CVE-2018-11803 : Security Advisory and Response

Apache Subversion 1.11.0 and 1.10.0 to 1.10.3 mod_dav_svn Uninitialized Pointer Crash Vulnerability

Understanding CVE-2018-11803

What is CVE-2018-11803?

The vulnerability in Apache Subversion's mod_dav_svn versions 1.11.0 and 1.10.0 to 1.10.3 can lead to a crash due to an uninitialized pointer when a client fails to include the root path during a recursive directory listing operation.

The Impact of CVE-2018-11803

This vulnerability allows attackers to potentially crash the Apache Subversion server, leading to denial of service.

Technical Details of CVE-2018-11803

Vulnerability Description

The issue arises from an uninitialized pointer dereference in Subversion's mod_dav_svn Apache HTTPD module versions 1.11.0 and 1.10.0 to 1.10.3.

Affected Systems and Versions

Product: Apache Subversion
Vendor: Apache Software Foundation
Versions: Apache Subversion 1.11.0, 1.10.0 to 1.10.3

Exploitation Mechanism

Attackers can exploit this vulnerability by omitting the root path during a recursive directory listing operation, causing the server to crash.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches provided by Apache Software Foundation.
Ensure root paths are included in all directory listing operations to prevent crashes.

Long-Term Security Practices

Regularly update and patch Apache Subversion installations.
Monitor security advisories from Apache and other relevant sources.

Patching and Updates

Stay informed about security updates and apply them promptly to mitigate the risk of exploitation.