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VuXML IDDescription
84fdd1bb-9d37-11e5-8f5c-002590263bf5passenger -- client controlled header overwriting

Daniel Knoppel reports:

It was discovered by the SUSE security team that it was possible, in some cases, for clients to overwrite headers set by the server, resulting in a medium level security issue. CVE-2015-7519 has been assigned to this issue.

Affected use-cases:

Header overwriting may occur if all of the following conditions are met:

  • Apache integration mode, or standalone+builtin engine without a filtering proxy
  • Ruby or Python applications only (Passenger 5); or any application (Passenger 4)
  • The app depends on a request header containing a dash (-)
  • The header is supposed to be trusted (set by the server)
  • The client correctly guesses the header name

This vulnerability has been fixed by filtering out client headers that do not consist of alphanumeric/dash characters (Nginx already did this, so Passenger+Nginx was not affected). If your application depends on headers that don't conform to this, you can add a workaround in Apache specifically for those to convert them to a dash-based format.


Discovery 2015-12-07
Entry 2015-12-07
rubygem-passenger
ge 5.0.0 lt 5.0.22

< 4.0.60

CVE-2015-7519
https://blog.phusion.nl/2015/12/07/cve-2015-7519/