CVE-2019-10097 : Vulnerability Insights and Analysis
Learn about CVE-2019-10097 affecting Apache HTTP Server versions 2.4.32 to 2.4.39. Understand the impact, technical details, and mitigation steps for this stack buffer overflow vulnerability.
Apache HTTP Server versions 2.4.32 to 2.4.39 are vulnerable to a stack buffer overflow or NULL pointer dereference when mod_remoteip is configured with a trusted intermediary proxy server using the "PROXY" protocol.
Understanding CVE-2019-10097
This CVE involves a specific vulnerability in Apache HTTP Server versions 2.4.32 to 2.4.39.
What is CVE-2019-10097?
In Apache HTTP Server versions 2.4.32 to 2.4.39, a stack buffer overflow or NULL pointer dereference can occur when mod_remoteip is set up to use a trusted intermediary proxy server with the "PROXY" protocol. An attacker could exploit this by manipulating a crafted PROXY header, but only through a trusted proxy.
The Impact of CVE-2019-10097
The vulnerability could lead to a stack buffer overflow or NULL pointer dereference, potentially allowing an attacker to execute arbitrary code or disrupt the server's operation.
Technical Details of CVE-2019-10097
Apache HTTP Server versions 2.4.32 to 2.4.39 are affected by this vulnerability.
Vulnerability Description
The issue arises when mod_remoteip is configured with a trusted intermediary proxy server using the "PROXY" protocol, enabling a specially crafted PROXY header to trigger the vulnerability.
Affected Systems and Versions
- Product: Apache HTTP Server
- Versions: 2.4.32 to 2.4.39
Exploitation Mechanism
- Exploitation requires a trusted intermediary proxy server utilizing the "PROXY" protocol.
- An attacker can manipulate a specifically crafted PROXY header to trigger the vulnerability.
Mitigation and Prevention
It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.
Immediate Steps to Take
- Update Apache HTTP Server to a non-vulnerable version.
- Disable mod_remoteip if not essential for server operations.
- Monitor network traffic for any suspicious activity.
Long-Term Security Practices
- Regularly update and patch software to mitigate known vulnerabilities.
- Implement network segmentation and access controls to limit exposure.
- Conduct security audits and penetration testing to identify and address weaknesses.
Patching and Updates
- Stay informed about security advisories and updates from Apache and other relevant sources.
- Apply patches promptly to secure the server against potential exploits.