USN-5063-1: HAProxy vulnerabilities

08 September 2021

HAProxy could be made to expose sensitive information over the network.

Releases

Packages

  • haproxy - fast and reliable load balancing reverse proxy

Details

Ori Hollander discovered that HAProxy incorrectly handled HTTP header name
length encoding. A remote attacker could possibly use this issue to inject
a duplicate content-length header and perform request smuggling attacks.

Update instructions

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

Ubuntu 21.04
Ubuntu 20.04

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

References