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Ubuntu: (Multiple Advisories) (CVE-2024-45614): Puma vulnerability

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Ubuntu: (Multiple Advisories) (CVE-2024-45614): Puma vulnerability

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
09/19/2024
Created
09/26/2024
Added
09/25/2024
Modified
11/15/2024

Description

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.

Solution(s)

  • ubuntu-pro-upgrade-puma

References

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