Headline
Ubuntu Security Notice USN-6530-1
Ubuntu Security Notice 6530-1 - It was 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.
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Ubuntu Security Notice USN-6530-1
December 05, 2023
haproxy vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
HAProxy could be made to expose sensitive information.
Software Description:
- haproxy: fast and reliable load balancing reverse proxy
Details:
It was 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 23.04:
haproxy 2.6.9-1ubuntu1.2
Ubuntu 22.04 LTS:
haproxy 2.4.22-0ubuntu0.22.04.3
Ubuntu 20.04 LTS:
haproxy 2.0.31-0ubuntu0.3
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6530-1
CVE-2023-45539
Package Information:
https://launchpad.net/ubuntu/+source/haproxy/2.6.9-1ubuntu1.2
https://launchpad.net/ubuntu/+source/haproxy/2.4.22-0ubuntu0.22.04.3
https://launchpad.net/ubuntu/+source/haproxy/2.0.31-0ubuntu0.3
Related news
Ubuntu Security Notice 6530-2 - 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.
Red Hat Security Advisory 2024-1142-03 - An update for haproxy is now available for Red Hat Enterprise Linux 9.
Red Hat Security Advisory 2024-1089-03 - An update for haproxy is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.
Debian Linux Security Advisory 5590-1 - Several vulnerabilities were discovered in HAProxy, a fast and reliable load balancing reverse proxy, which can result in HTTP request smuggling or information disclosure.
HAProxy before 2.8.2 accepts # as part of the URI component, which might allow remote attackers to obtain sensitive information or have unspecified other impact upon misinterpretation of a path_end rule, such as routing index.html#.png to a static server.