CVE-2018-1302 : Vulnerability Insights and Analysis

The Apache HTTP Server prior to version 2.4.30 had a vulnerability where a NULL pointer could be written to memory that had already been freed, potentially triggered by destroying an HTTP/2 stream.

Understanding CVE-2018-1302

This CVE involves a potential vulnerability in the Apache HTTP Server that could lead to memory corruption under specific conditions.

What is CVE-2018-1302?

When an HTTP/2 stream was destroyed after being handled, the Apache HTTP Server prior to version 2.4.30 could have written a NULL pointer potentially to an already freed memory. The risk level is low due to the difficulty in triggering the vulnerability in typical configurations.

The Impact of CVE-2018-1302

Low risk vulnerability due to unlikely triggering in typical server configurations
Difficulty in reproducing the issue outside of debug builds

Technical Details of CVE-2018-1302

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The vulnerability involves a possible write of after free on HTTP/2 stream shutdown, leading to memory corruption.

Affected Systems and Versions

Product: Apache HTTP Server
Vendor: Apache Software Foundation
Versions Affected: 2.4.17 to 2.4.29

Exploitation Mechanism

The vulnerability could be exploited by destroying an HTTP/2 stream after handling it, potentially causing a NULL pointer write to already freed memory.

Mitigation and Prevention

To address CVE-2018-1302, follow these mitigation strategies:

Immediate Steps to Take

Update Apache HTTP Server to version 2.4.30 or newer
Monitor vendor advisories for patches and updates

Long-Term Security Practices

Regularly update and patch software to the latest versions
Implement secure coding practices to prevent memory corruption vulnerabilities
Conduct regular security audits and testing to identify and address vulnerabilities

Patching and Updates

Apply patches provided by Apache Software Foundation to fix the vulnerability
Stay informed about security updates and advisories from relevant vendors