Open Technology Real Services nested tags cross-site scripting vulnerability

Overview

Open Technology Real Services (OTRS) is susceptible to a cross-site scripting vulnerability when viewing HTML webpages with nested tags.

Description

Open Technology Real Services (OTRS) contains a cross-site scripting (CWE-79) vulnerability in the email body. An attacker may be able to load arbitrary script in the context of the user’s browser when they view a specifically crafted email message containing an invalid HTML structure with nested tags.

Proof-of-Concept:

<s<script>...</script><script>...<cript type="text/javascript"> document.write("Hello World!"); alert('Mike was here!');; </s<script>//<cript>

Additional details may be found in the OTRS advisory.

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Impact

An attacker may be able to execute arbitrary script in the context of the user’s browser.

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Solution

Apply an Update

The OTRS advisory states: This vulnerability is fixed in OTRS 2.4.14, 3.0.16 and 3.1.10 and it is recommended to upgrade to one of these versions.

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Vendor Information

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OTRS Affected

Notified: August 27, 2012 Updated: August 30, 2012

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

• <http://www.otrs.com/de/open-source/community-news/security-advisories/security-advisory-2012-02/&gt;

CVSS Metrics

Group	Score	Vector
Base	6.1	AV:N/AC:H/Au:N/C:P/I:C/A:N
Temporal	4.8	E:POC/RL:OF/RC:C
Environmental	4.8	CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

• <http://www.otrs.com/de/open-source/community-news/security-advisories/security-advisory-2012-02/&gt;
• <http://cwe.mitre.org/data/definitions/79.html&gt;
• <http://znuny.com/en/#!/advisory/ZSA-2012-02&gt;

Acknowledgements

Thanks to Mike Eduard of Znuny GmbH for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs:	CVE-2012-4600
Date Public:	2012-08-30 Date First Published: