CVE-2013-4200 Information

Description

The isURLInPortal method in the URLTool class in in_portal.py in Plone 2.1 through 4.1 4.2.x through 4.2.5 and 4.3.x through 4.3.1 treats URLs starting with a space as a relative URL which allows remote attackers to bypass the allow_external_login_sites filtering property redirect users to arbitrary web sites and conduct phishing attacks via a space before a URL in the \next\ parameter to acl_users/credentials_cookie_auth/require_login.

Reference

http://plone.org/products/plone/security/advisories/20130618-announcement http://plone.org/products/plone-hotfix/releases/20130618 http://www.openwall.com/lists/oss-security/2013/08/01/2 http://www.securityfocus.com/archive/1/530787/100/0/threaded https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4200