DEBIAN-CVE-2024-45614
Record from OSV · Published September 19, 2024
Puma is a Ruby/Rack web server built for parallelism. In affected versions clients could clobber values set by intermediate proxies (such as X-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 the non-underscore version also exists. Effectively, allowing the proxy defined headers to always win. Users are advised to upgrade. Nginx has a underscores_in_headers configuration variable to discard these headers at the proxy level as a mitigation. Any users that are implicitly trusting the proxy defined headers for security should immediately cease doing so until upgraded to the fixed versions.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| puma | Debian:14 | 6.4.3-1 |
| puma | Debian:12 | 5.6.5-3+deb12u1 |
| puma | Debian:13 | 6.4.3-1 |
Risk scores
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | puma | 0 |
| Debian:12 | puma | 0, 5.6.5-3 |
| Debian:13 | puma | 0 |
Timeline
- Sep 19, 2024 CVE Published
- Sep 15, 2026 CVE Updated
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