oss-security - CVE Request -- Data-FormValidator -- Reports invalid field as valid when untaint_all

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Date: Sun, 12 Jun 2011 16:49:33 +0200
From: Jan Lieskovsky <jlieskov@...hat.com>
To: "Steven M. Christey" <coley@...us.mitre.org>
CC: oss-security@...ts.openwall.com, Damyan Ivanov <dmn@...ian.org>,
        Mark Stosberg <mark@...mersault.com>, 629511@...s.debian.org,
        Iain Arnell <iarnell@...il.com>,
        Marcela Maslanova <mmaslano@...hat.com>
Subject: CVE Request -- Data-FormValidator -- Reports invalid field as valid
 when untaint_all_constraints used

Hello, Josh, Steve, vendors,

   It was found that perl-Data-FormValidator, a HTML form user input
validator, used to treat certain invalid fields as valid, when the
untaint_all_constraints directive was used (default for majority of
Data-FormValidator routines). A remote attacker could use this flaw to
bypass perl Taint mode protection mechanism via specially-crafted input
provided to the HTML form.

Note: Hopefully Damyan, Mark can clarify here, if valid data from
       Data-FormValidator are automatically marked as untainted for
       perl Taint mode or not. If there still is perl Taint mode
       protection check present, even on valid Data-FormValidator
       data and it couldn't happen, that tainted data would be passed
       further to the script processing, then this is not a security
       issue.

References:
[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=629511
[2] https://rt.cpan.org/Public/Bug/Display.html?id=61792
[3] https://bugzilla.redhat.com/show_bug.cgi?id=712694

Could you allocate a CVE id for this?

Thank you & Regards, Jan.
--
Jan iankko Lieskovsky / Red Hat Security Response Team

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