CVE-2019-17567 : Vulnerability Insights and Analysis
Learn about CVE-2019-17567 affecting Apache HTTP Server versions 2.4.6 to 2.4.46. Understand the impact, affected systems, exploitation mechanism, and mitigation steps.
Apache HTTP Server versions 2.4.6 to 2.4.46 with mod_proxy_wstunnel configured could allow unauthorized bypass of HTTP security measures.
Understanding CVE-2019-17567
This CVE involves a vulnerability in Apache HTTP Server versions 2.4.6 to 2.4.46 that could potentially compromise the security of the server.
What is CVE-2019-17567?
The affected versions of Apache HTTP Server, when configured with the mod_proxy_wstunnel module, could tunnel the entire connection without proper validation, authentication, or authorization, even if the origin server did not request an upgrade.
The Impact of CVE-2019-17567
This vulnerability allowed subsequent requests on the same connection to bypass any HTTP validation, authentication, or authorization measures that might have been in place, potentially leading to unauthorized access or data breaches.
Technical Details of CVE-2019-17567
Apache HTTP Server versions 2.4.6 to 2.4.46 with mod_proxy_wstunnel configured were affected by this vulnerability.
Vulnerability Description
The mod_proxy_wstunnel module in the specified versions could tunnel the entire connection, allowing subsequent requests to bypass security measures.
Affected Systems and Versions
- Product: Apache HTTP Server
- Vendor: Apache Software Foundation
- Affected Versions: 2.4.6 to 2.4.46
Exploitation Mechanism
The vulnerability could be exploited by sending subsequent requests on the same connection, bypassing any HTTP security validations.
Mitigation and Prevention
To address CVE-2019-17567, immediate steps and long-term security practices are recommended.
Immediate Steps to Take
- Update Apache HTTP Server to a non-vulnerable version.
- Disable the mod_proxy_wstunnel module if not required.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch Apache HTTP Server and its modules.
- Implement network segmentation to limit the impact of potential breaches.
Patching and Updates
Ensure that Apache HTTP Server is regularly updated with the latest security patches to mitigate the risk of exploitation.