oss-security - CVE Request -- Python-Mako (prior v0.3.4): Improper escaping of single quotes in escape.cgi (XSS)

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Message-ID: <4C2B6EC2.3020603@redhat.com>
Date: Wed, 30 Jun 2010 18:20:18 +0200
From: Jan Lieskovsky <jlieskov@...hat.com>
To: "Steven M. Christey" <coley@...us.mitre.org>
CC: oss-security <oss-security@...ts.openwall.com>,
        David Malcolm <dmalcolm@...hat.com>, Kyle VanderBeek <kylev@...ev.com>
Subject: CVE Request -- Python-Mako (prior v0.3.4): Improper escaping of single
 quotes in escape.cgi (XSS)

Hi Steve, vendors,

   Craig Younkins reported:
     [1] http://bugs.python.org/issue9061

   that Python Mako (of versions prior v0.3.4), a template library written in Python,
   improperly escaped single quotes in escape.cgi. An attacker could use this flaw to conduct
   cross-site scripting (XSS) attacks.

   References:
     [2] http://www.makotemplates.org/CHANGES

Sample public PoC (from [1]):

   Proof of concept:
   print """<body class='%s'></body>""" % cgi.escape("' onload='alert(1);'
bad='")

Could you allocate a CVE id for this?

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

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