puma: Puma is a Ruby/Rack web server built for parallelism
CVE-2024-45614 is fixed in 2 products on 1 platform, first by puma 3.12.4-1ubuntu2+esm2, released September 19, 2024. It is not reported as exploited. Patch Radar priority: Routine.
Puma is a Ruby/Rack web server built for parallelism. In affected versionsclients could clobber values set by intermediate proxies (such asX-Forwarded-For) by providing a underscore version of the same header(X-Forwarded_For). Any users relying on proxy set variables is affected.v6.4.3/v5.6.9 now discards any headers using underscores if thenon-underscore version also exists. Effectively, allowing the proxy definedheaders to always win. Users are advised to upgrade. Nginx has aunderscores_in_headers configuration variable to discard these headers atthe proxy level as a mitigation. Any users that are implicitly trusting theproxy defined headers for security should immediately cease doing so untilupgraded to the fixed versions.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| puma · Debian 12.15 (bookworm) | 5.6.5-3+deb12u1 | DEBIAN-CVE-2024-45614 | Sep 19, 2024 |
| puma · Debian 13.5 (trixie) | 6.4.3-1 | DEBIAN-CVE-2024-45614 | Sep 19, 2024 |
| puma · Debian 14 | 6.4.3-1 | DEBIAN-CVE-2024-45614 | Sep 19, 2024 |
| puma · Ubuntu 20.04 LTS (focal) | 3.12.4-1ubuntu2+esm2 | puma 3.12.4-1ubuntu2+esm2 | Sep 19, 2024 |
| puma · Ubuntu 22.04.1 LTS (jammy) | 5.5.2-2ubuntu2+esm2 | puma 5.5.2-2ubuntu2+esm2 | Sep 19, 2024 |
| puma · Ubuntu 24.04.5 LTS (noble) | 6.4.2-4ubuntu4.3 | puma 6.4.2-4ubuntu4.3 | Sep 19, 2024 |
| puma · Ubuntu 24.10 (oracular) | 6.4.2-5ubuntu4 | puma 6.4.2-5ubuntu4 | Sep 20, 2024 |
| puma · Ubuntu 25.04 (plucky) | 6.4.2-5ubuntu4 | puma 6.4.2-5ubuntu4 | Sep 20, 2024 |
| rubygem-puma · opensuse-leap 15.6 | 5.6.9-150600.18.3.1 | SUSE-SU-2025:03467-1 | Oct 7, 2025 |
| rubygem-puma · sles 15.6 | 5.6.9-150600.18.3.1 | SUSE-SU-2025:03467-1 | Oct 7, 2025 |
| rubygem-puma · sles 15.7 | 5.6.9-150600.18.3.1 | SUSE-SU-2025:03467-1 | Oct 7, 2025 |
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