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Ubuntu Security Notice USN-7031-2
September 24, 2024

puma vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

Puma could be made to overwrite headers if it received specially crafted
network traffic.

Software Description:
- puma: threaded HTTP 1.1 server for Ruby/Rack applications

Details:

USN-7031-1 fixed CVE-2024-45614 in Puma for Ubuntu 24.04 LTS.
This update fixes the CVE for Ubuntu 22.04 LTS and Ubuntu 20.04 LTS.

Original advisory details:

It was discovered that Puma incorrectly handled parsing certain headers.
A remote attacker could possibly use this issue to overwrite header values
set by intermediate proxies by providing duplicate headers containing
underscore characters.

Update instructions:

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

Ubuntu 22.04 LTS
puma 5.5.2-2ubuntu2+esm2
Available with Ubuntu Pro

Ubuntu 20.04 LTS
puma 3.12.4-1ubuntu2+esm2
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-7031-2
https://ubuntu.com/security/notices/USN-7031-1
CVE-2024-45614