1. Ubuntu Security Notices
  2. USN-7031-1

USN-7031-1: Puma vulnerability

Publication date

24 September 2024

Overview

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

Releases

Packages

  • puma - threaded HTTP 1.1 server for Ruby/Rack applications

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.

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
24.04 noble puma –  6.4.2-4ubuntu4.3

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References

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