CVE-2019-13067 : Vulnerability Insights and Analysis

An issue of buffer over-read has been identified in njs, which is used in NGINX versions up to 0.3.3. The vulnerability exists in the nxt_utf8_decode function within the nxt/nxt_utf8.c file. This problem persists even after the fix for CVE-2019-12207.

Understanding CVE-2019-13067

This CVE involves a buffer over-read vulnerability in njs, impacting NGINX versions up to 0.3.3.

What is CVE-2019-13067?

CVE-2019-13067 is a buffer over-read vulnerability found in the nxt_utf8_decode function within the njs module used in NGINX versions up to 0.3.3.

The Impact of CVE-2019-13067

The vulnerability could allow an attacker to read beyond the allocated memory, potentially leading to sensitive data exposure or a denial of service (DoS) condition.

Technical Details of CVE-2019-13067

This section provides more technical insights into the CVE.

Vulnerability Description

The issue arises in the nxt_utf8_decode function within the nxt/nxt_utf8.c file, allowing for a buffer over-read.

Affected Systems and Versions

NGINX versions up to 0.3.3

Exploitation Mechanism

The vulnerability can be exploited by crafting a specific request to trigger the buffer over-read in the affected function.

Mitigation and Prevention

Protect your systems from CVE-2019-13067 with the following steps:

Immediate Steps to Take

Apply security patches provided by NGINX promptly.
Monitor NGINX security advisories for updates and mitigation guidance.

Long-Term Security Practices

Regularly update NGINX and its components to the latest versions.
Implement network security measures to detect and block malicious traffic.

Patching and Updates

Stay informed about security updates and patches released by NGINX.
Test patches in a controlled environment before applying them to production systems.