Security vulnerabiity CVE 2011-3587: Arbitrary Code Execution

The Zope security response team is announcing a fix for a
vulnerability in Zope 2.12.x and Zope 2.13.x that allows execution of
arbitrary code by anonymous users. The hotfix for this vulnerability
was pre-announced last week.

This is a severe vulnerability that allows an unauthenticated attacker
to employ a carefully crafted web request to execute arbitrary
commands with the privileges of the Zope service.

Versions Affected:  Zope 2.12.x and Zope 2.13.x.

Versions Not Affected: Zope 2.11.x, Zope 2.10.x or prior

You can either install the Hotfix as an egg release from
http://pypi.python.org/pypi/Products.Zope_Hotfix_CVE_2011_3587 or as
an old-style product release available from
http://download.zope.org/Zope2/hotfixes/Zope_Hotfix_CVE_2011_3587-v10.tar.gz.

Alternatively you can upgrade to the latest bugfix release of Zope.
Versions 2.12.20 and 2.13.10 will be released today and include the
fix for this vulnerability.

Please refer to
http://zope2.zope.org/news/security-vulnerability-announcement-cve-2011-3587
for more details.

The Plone community has also released a security hotfix today covering
an additional security issue. If you are using Plone, please refer to
http://plone.org/products/plone/security/advisories/20110928.

On behalf of the Zope security response team,
Hanno Schlichting
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