CVE-2021-28544 : Exploit Details and Defense Strategies
Learn about CVE-2021-28544 affecting Apache Subversion versions 1.10.0 to 1.14.1. Understand the exposure of sensitive 'copyfrom' paths and the impact on server security.
Apache Subversion SVN authz protected copyfrom paths regression is a vulnerability affecting versions 1.10.0 to 1.14.1 of Apache Subversion. It allows users to view 'copyfrom' paths that should be hidden, revealing sensitive information.
Understanding CVE-2021-28544
This section provides insights into the nature and impact of the CVE-2021-28544 vulnerability.
What is CVE-2021-28544?
CVE-2021-28544, also known as Apache Subversion SVN authz protected copyfrom paths regression, exposes 'copyfrom' paths that should be protected according to configured path-based authorization rules. This information leakage can lead to unauthorized access to sensitive data.
The Impact of CVE-2021-28544
The vulnerability affects Apache Subversion versions 1.10.0 to 1.14.1, allowing users to see 'copyfrom' paths of original nodes, revealing that the nodes were copied from protected locations.
Technical Details of CVE-2021-28544
In this section, we dive into the technical aspects of CVE-2021-28544 to understand the vulnerability better.
Vulnerability Description
Subversion servers, including both httpd and svnserve servers, disclose 'copyfrom' paths that should be hidden by path-based authorization rules. This exposure can jeopardize the confidentiality of sensitive information.
Affected Systems and Versions
The vulnerability impacts Apache Subversion versions 1.10.0 to 1.14.1, making servers susceptible to revealing 'copyfrom' paths.
Exploitation Mechanism
Users with access to copied nodes can exploit the vulnerability to view 'copyfrom' paths and unauthorized details.
Mitigation and Prevention
This section covers the measures to mitigate the risks associated with CVE-2021-28544 and prevent potential exploitation.
Immediate Steps to Take
Users are advised to update Apache Subversion to patched versions that address the vulnerability. Additionally, restricting access rights can help limit exposure to sensitive information.
Long-Term Security Practices
Implementing strict access controls, regular security audits, and educating users on data protection best practices can enhance long-term security.
Patching and Updates
Regularly applying security patches provided by Apache Software Foundation is crucial to ensure protection against known vulnerabilities.