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Telerik ASP.NET AJAX RadEditor Control 2014.1.403.35 XSS

Telerik ASP.NET AJAX RadEditor Control 2014.1.403.35 XSS
Posted Sep 25, 2014
Authored by G. S. McNamara, Tyler Hoyle

Telerik ASP.NET AJAX RadEditor Control versions 2014.1.403.35 and 2009.3.1208.20 suffer from a persistent cross site scripting vulnerability.

tags | advisory, xss, asp
advisories | CVE-2014-4958
MD5 | beb89cba885a1201044ca7c377436e7f

Telerik ASP.NET AJAX RadEditor Control 2014.1.403.35 XSS

Change Mirror Download
All versions of the popular UI for ASP.NET AJAX RadEditor Control product by Telerik may be affected by a high-risk stored attribute-based cross-site scripting (XSS) vulnerability that is assigned CVE-2014-4958. This WYSIWYG rich text editor is “...what Microsoft chose to use in MSDN, CodePlex, TechNet, MCMS and even as an alternative to the default editor in SharePoint.”

Personally tested and confirmed are versions: 2014.1.403.35 (much newer) and 2009.3.1208.20 (much older) using Internet Explorer 8, version 8.0.7601.17514. However, all versions from Telerik at this time may be vulnerable and will continue to be until a patched is released. A workaround may be available.

More information on the vulnerability: http://maverickblogging.com/disclosing-cve-2014-4958-stored-attribute-based-cross-site-scripting-xss-vulnerability-in-telerik-ui-for-asp-net-ajax-radeditor-control/

Remediation: Telerik states: We have applied a patch to the editor that will be delivered with our Q3 edition of the controls that should be released towards the end of October. A blog post on the issue has been published here: http://blogs.telerik.com/blogs/14-09-24/securing-radeditor-content-and-preventing-xss-attacks

Additional credit goes to Tyler Hoyle and the rest of my team in CGI Federal’s Emerging Technologies Security Practice for their hard work.

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