queryCatalog.py in Plone before 4.2.3 and 4.3 before beta 1 allows remote attackers to bypass caching and cause a denial of service via a crafted request to a collection.
rhn.redhat.com/errata/RHSA-2014-1194.html
www.openwall.com/lists/oss-security/2012/11/09/7
www.openwall.com/lists/oss-security/2012/11/10/1
github.com/plone/Products.CMFPlone/blob/4.2.3/docs/CHANGES.txt
plone.org/products/plone-hotfix/releases/20121106
plone.org/products/plone/security/advisories/20121106/14