The Rack::Cache rubygem has a flaw where it will cache sensitive headers (such as Set-Cookie response headers), which could leak potentially sensitive information.
This has been corrected in upstream git .
Created rubygem-rack-cache tracking bugs for this issue
Affects: fedora-17 [bug 824523]
rubygem-rack-cache-1.2-1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
Added CVE as per http://www.openwall.com/lists/oss-security/2012/06/06/8