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Ubuntu Security Notice USN-6530-2
July 23, 2024
haproxy vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
HAProxy could be made to expose sensitive information.
Software Description:
- haproxy: fast and reliable load balancing reverse proxy
Details:
Seth Manesse and Paul Plasil discovered that HAProxy incorrectly handled
URI components containing the hash character (#). A remote attacker could
possibly use this issue to obtain sensitive information, or to bypass
certain path_end rules.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 18.04 LTS
   haproxy                         1.8.8-1ubuntu0.13+esm2
                                   Available with Ubuntu Pro
Ubuntu 16.04 LTS
   haproxy                         1.6.3-1ubuntu0.3+esm1
                                   Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
   https://ubuntu.com/security/notices/USN-6530-2
   https://ubuntu.com/security/notices/USN-6530-1
   CVE-2023-45539