Date: Thu, 8 Sep 2011 14:25:34 +0200 From: Moritz Muehlenhoff <jmm@...ian.org> To: oss-security@...ts.openwall.com Cc: "Steven M. Christey" <coley@...us.mitre.org>, Ferdinand <debbug@...tplaza.com>, Russ Allbery <rra@...ian.org>, Sven Verdoolaege <skimo@...net.org>, Chris Weyl <cweyl@...mni.drew.edu> Subject: Re: CVE Request -- libfcgi-perl / perl-FCGI: Certain environment variables shared between first and subsequent HTTP requests On Thu, Sep 08, 2011 at 10:32:47AM +0200, Jan Lieskovsky wrote: > Hello Josh, Steve, vendors, > > it was found that the perl Fast CGI module did not properly clean up > certain environment variables, related to a particular HTTP request, > between subsequent incoming requests. Any environment variable set in > the first pass through the code by processing the first request, that > wasn't set in some subsequent request, has been added to the hash > containing environment variables for that subsequent request. A remote > attacker could use this flaw to bypass the authentication process and > obtain access to resources, which would be otherwise protected by > authentication. > > References: >  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=607479 >  https://bugzilla.redhat.com/show_bug.cgi?id=736604 > > Russ Allbery of Debian (Cc-ed) provides further elaborated analysis > of the reasons of the issue: >  http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=607479#10 > > Cc-ed also Sven Verdoolaege, the perl FCGI module author (as noted > on CPAN) for his opinion too. > > Could you allocate a CVE id for this issue? > > Thank you && Regards, Jan. > -- > Jan iankko Lieskovsky / Red Hat Security Response Team > > P.S.: Though the issue has been reported Sat, 18 Dec 2010 22:13:40 +0100 > already, only Russ's analysis (Wed, 07 Sep 2011 20:24:00 -0700) > unveiled the full security implications of this issue. So I > assume, the CVE-2011-* identifier would be sufficient to cover > this issue. But feel free to correct me if I am wrong here. > Thanks, Jan. FYI: Debian already allocated CVE-2011-2766 to this. http://bugs.debian.org/cgi-bin/bugreport.cgi?msg=19;bug=607479 Cheers, Moritz
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