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Vigil@nce - OTRS: Cross Site Scripting via an email

September 2012 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can send an email to OTRS, in order to generate a Cross Site Scripting in the Firefox/Opera web browser of the victim who reads the message.

Impacted products: OTRS Help Desk

Severity: 2/4

Creation date: 30/08/2012

DESCRIPTION OF THE VULNERABILITY

The OTRS service processes messages coming from users.

However, emails in HTML format are not correctly filtered before being inserted in web pages generated by OTRS. For example:
- nested HTML tags are not filtered
- blocks of type "script", with a closing tag containing spaces are not filtered
- JavaScript expressions contained in CSS style sheets are not filtered
- block of type SVG are not filtered
- tags with the attribute "src=" are not filtered

An attacker can therefore send an email to OTRS, in order to generate a Cross Site Scripting in the Firefox/Opera web browser of the victim who reads the message.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/O...




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