1. Ubuntu Security Notices
  2. USN-7135-1

USN-7135-1: HAProxy vulnerability

Publication date

3 December 2024

Overview

HAProxy could allow unintended access to network services.

Releases

Packages

  • haproxy - fast and reliable load balancing reverse proxy

Details

Bahruz Jabiyev, Anthony Gavazzi, Engin Kirda, Kaan Onarlioglu, Adi Peleg,
and Harvey Tuch discovered that HAProxy incorrectly handled empty header
names. A remote attacker could possibly use this issue to manipulate
headers and bypass certain authentication checks and restrictions.

Bahruz Jabiyev, Anthony Gavazzi, Engin Kirda, Kaan Onarlioglu, Adi Peleg,
and Harvey Tuch discovered that HAProxy incorrectly handled empty header
names. A remote attacker could possibly use this issue to manipulate
headers and bypass certain authentication checks and restrictions.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
16.04 xenial haproxy –  1.6.3-1ubuntu0.3+esm2  

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References

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