A form details exposure flaw was found in the way z3c.form, an advanced form and widget framework for Zope 3, performed processing of certain form fields. A remote attacker could provide a specially-crafted URL that, when processed, would leak default values of form elements (knowledge of the location of a form and identifiers of its elements allowed to obtain coded default values of those elements). References: [1] http://plone.org/products/plone/security/advisories/20121106/07 [2] http://plone.org/products/plone/security/advisories/20121106/ Relevant upstream HotFixes: [3] http://plone.org/products/plone-hotfix/releases/20121106 (widget_traversal.py change from upstream hotfix seems to be relevant for this issue)
From OSS post: [4] http://www.openwall.com/lists/oss-security/2012/11/07/4 upstream HotFix change relevant to this issue is widget_traversal.py change.
The CVE identifier of CVE-2012-5491 has been assigned to this issue: http://www.openwall.com/lists/oss-security/2012/11/10/1
This issue may affect the version of plone as shipped with EPEL5, however the latest version there is 3.1.6 (and the latest 3.x release is 3.3.5, which was released a year prior to this flaw being discovered). Given the age of the EPEL5 package and its lack of support, we do not recommend anyone use it. This issue does not affect plone as provided with the conga package on Red Hat Enterprise Linux 5. Statement: Not vulnerable. This issue did not affect the versions of luci (as provided by conga) as shipped with Red Hat Enterprise Linux 5.