CVE-2019-0220 : What You Need to Know
Learn about CVE-2019-0220, a security flaw in Apache HTTP Server versions 2.4.0 to 2.4.38 causing URL normalization inconsistencies. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A security flaw has been identified in versions 2.4.0 to 2.4.38 of the Apache HTTP Server related to URL normalization inconsistencies.
Understanding CVE-2019-0220
This CVE involves a vulnerability in the Apache HTTP Server versions 2.4.0 to 2.4.38 that can lead to URL normalization inconsistencies.
What is CVE-2019-0220?
CVE-2019-0220 is a security vulnerability found in the Apache HTTP Server versions 2.4.0 to 2.4.38. It specifically affects how the server handles consecutive forward slashes ('/') in request URLs.
The Impact of CVE-2019-0220
The vulnerability can cause issues when processing request URLs with multiple consecutive slashes, potentially leading to security risks and improper server behavior.
Technical Details of CVE-2019-0220
This section provides more in-depth technical details about the CVE.
Vulnerability Description
The flaw in Apache HTTP Server versions 2.4.0 to 2.4.38 arises when handling request URLs with repeated forward slashes. Directives like LocationMatch and RewriteRule must be cautious with duplicated slashes in regular expressions to prevent unintended merging.
Affected Systems and Versions
- Product: Apache HTTP Server
- Vendor: Apache Software Foundation
- Versions Affected: 2.4.0 to 2.4.38
Exploitation Mechanism
Exploiting this vulnerability involves crafting request URLs with consecutive forward slashes to trigger improper handling by the server, potentially leading to security breaches.
Mitigation and Prevention
To address CVE-2019-0220 and enhance overall security, consider the following steps:
Immediate Steps to Take
- Apply patches or updates provided by Apache Software Foundation.
- Review and adjust directives like LocationMatch and RewriteRule to handle duplicate slashes properly.
Long-Term Security Practices
- Regularly monitor for security advisories and updates from Apache.
- Implement secure coding practices to prevent similar vulnerabilities in the future.
Patching and Updates
Ensure that you promptly apply any security patches or updates released by Apache Software Foundation to mitigate the CVE-2019-0220 vulnerability.