CVE-2024-45614
Header normalization allows for client to clobber proxy set headers in Puma
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Header normalization allows for client to clobber proxy set headers in Puma
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.
Reserved 2024-09-02 | Published 2024-09-19 | Updated 2024-09-20 | Assigner GitHub_MCWE-639: Authorization Bypass Through User-Controlled Key
github.com/puma/puma/security/advisories/GHSA-9hf4-67fc-4vf4
nginx.org/en/docs/http/ngx_http_core_module.html
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