A HTTP-Daemon security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 22.04 LTS.

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Ubuntu Security Notice USN-5520-1
July 14, 2022

libhttp-daemon-perl vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

HTTP-Daemon could allow HTTP Request Smuggling attacks.

Software Description:
- libhttp-daemon-perl: simple http server class

Details:

It was discovered that HTTP-Daemon incorrectly handled certain crafted
requests. A remote attacker could possibly use this issue to perform an
HTTP Request Smuggling attack.

Update instructions:

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

Ubuntu 22.04 LTS:
libhttp-daemon-perl 6.13-1ubuntu0.1

Ubuntu 20.04 LTS:
libhttp-daemon-perl 6.06-1ubuntu0.1

Ubuntu 18.04 LTS:
libhttp-daemon-perl 6.01-1ubuntu0.1

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

References:
  https://ubuntu.com/security/notices/USN-5520-1
CVE-2022-31081

Package Information:
  https://launchpad.net/ubuntu/+source/libhttp-daemon-perl/6.13-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libhttp-daemon-perl/6.06-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/libhttp-daemon-perl/6.01-1ubuntu0.1