A HTTP-Daemon security update has been released for Ubuntu Linux 14.04 ESM and 16.04 ESM.

USN-5520-2: HTTP-Daemon vulnerability

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Ubuntu Security Notice USN-5520-2
July 18, 2022

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

- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

HTTP-Daemon could allow HTTP Request Smuggling attacks.

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

Details:

USN-5520-1 fixed a vulnerability in HTTP-Daemon. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory 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 16.04 ESM:
libhttp-daemon-perl 6.01-1ubuntu0.16.04~esm1

Ubuntu 14.04 ESM:
libhttp-daemon-perl 6.01-1ubuntu0.14.04~esm1

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

References:
  https://ubuntu.com/security/notices/USN-5520-2
  https://ubuntu.com/security/notices/USN-5520-1
CVE-2022-31081