CVE-2019-11323 : Security Advisory and Response

HAProxy before version 1.9.7 mishandles a reload with rotated keys, leading to the use of uninitialized and predictable HMAC keys. This vulnerability is associated with an error in include/types/ssl_sock.h.

Understanding CVE-2019-11323

This section provides insights into the impact and technical details of CVE-2019-11323.

What is CVE-2019-11323?

CVE-2019-11323 is a vulnerability in HAProxy versions prior to 1.9.7, where a reload with rotated keys can result in the utilization of uninitialized and highly predictable HMAC keys.

The Impact of CVE-2019-11323

The mishandling of rotated keys in HAProxy can lead to security risks due to the use of uninitialized and predictable HMAC keys, potentially enabling attackers to exploit the system.

Technical Details of CVE-2019-11323

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

A reload in HAProxy before version 1.9.7 is mishandled when using rotated keys, resulting in the use of uninitialized HMAC keys that are highly predictable. The issue is linked to an error in include/types/ssl_sock.h.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions: N/A

Exploitation Mechanism

The vulnerability arises from the mishandling of rotated keys during a reload process, leading to the utilization of uninitialized and predictable HMAC keys.

Mitigation and Prevention

Protective measures to address CVE-2019-11323.

Immediate Steps to Take

Update HAProxy to version 1.9.7 or newer to mitigate the vulnerability.
Monitor vendor security advisories for patches and updates.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement strong key management practices to enhance security.

Patching and Updates

Apply patches provided by HAProxy promptly to address the vulnerability and enhance system security.