Jeremy Kemper mailed this information to vendor-sec: Fix an exploitable bug in CGI multipart parsing which affects Ruby <= 1.8.5 when the input stream returns "" (empty string) instead of nil on EOF. Certain malformed multipart requests leave the parser in a non-terminating state, leaving the program vulnerable to denial of service attack. The fix more carefully checks for input stream EOF. affected: standalone CGI, Mongrel unaffected: FastCGI, mod_ruby, WEBrick This fully closes a previously-reported but partially-fixed vulnerability: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0983 http://www.securityfocus.com/bid/11618/info
This issue should also affect RHEL2.1 and RHEL3
Created attachment 139389 [details] Proposed patch
Lifting embargo: http://rubyforge.org/pipermail/mongrel-users/2006-October/001946.html
should be fixed in ruby-1.6.4-2.AS21.4, ruby-1.6.8-9.EL3.7 and ruby-1.8.1-7.EL4.7
built ruby-1.6.8-9.EL3.8 and ruby-1.8.1-7.EL4.8
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2006-0729.html