CVE-2017-7659 : Exploit Details and Defense Strategies

Apache HTTP Server versions 2.4.24 and 2.4.25 are vulnerable to a crash due to a NULL pointer dereference in the mod_http2 module.

Understanding CVE-2017-7659

This CVE involves a vulnerability in Apache HTTP Server versions 2.4.24 and 2.4.25 that could be exploited to crash the server process.

What is CVE-2017-7659?

A maliciously crafted HTTP/2 request can trigger a NULL pointer dereference in mod_http2, leading to a server process crash.

The Impact of CVE-2017-7659

The vulnerability allows attackers to deliberately create HTTP/2 requests to exploit the server, potentially causing a denial of service.

Technical Details of CVE-2017-7659

Apache HTTP Server versions 2.4.24 and 2.4.25 are affected by this vulnerability.

Vulnerability Description

The issue arises from a NULL pointer dereference in the mod_http2 module when processing HTTP/2 requests.

Affected Systems and Versions

Product: Apache HTTP Server
Vendor: Apache Software Foundation
Versions: 2.4.24, 2.4.25

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted HTTP/2 requests to the server, causing it to crash.

Mitigation and Prevention

To address CVE-2017-7659, follow these steps:

Immediate Steps to Take

Apply patches provided by Apache Software Foundation.
Monitor network traffic for any suspicious HTTP/2 requests.

Long-Term Security Practices

Keep Apache HTTP Server updated to the latest version.
Implement network security measures to detect and block malicious requests.

Patching and Updates

Regularly check for security updates and apply patches promptly to mitigate the risk of exploitation.