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Open-Xchange Guard 2.0 Cross Site Scripting

Open-Xchange Guard 2.0 Cross Site Scripting
Posted Nov 17, 2015
Authored by Martin Heiland, Eduard Hauck

Open-Xchange Guard version 2.0 suffers from a cross site scripting vulnerability.

tags | advisory, xss
advisories | CVE-2015-7385
MD5 | 7bcf96196babe6f26d2f7cccfa2c4dd3

Open-Xchange Guard 2.0 Cross Site Scripting

Change Mirror Download
Product: Open-Xchange Guard
Vendor: Open-Xchange GmbH

Internal reference: 41466 (Bug ID)
Vulnerability type: Cross-Site-Scripting (CWE-80)
Vulnerable version: 2.0
Vulnerable component: guard
Report confidence: Confirmed
Solution status: Fixed by vendor
Fixed version: 2.0.0-rev11
Researcher Credits: Eduard Hauck
Vendor notification: 2015-09-25
Solution date: 2015-09-30
CVE reference: CVE-2015-7385
CVSSv2: 5.7 (AV:N/AC:M/Au:N/C:P/I:N/A:N/E:POC/RL:U/RC:C/CDP:LM/TD:H/CR:ND/IR:ND/AR:ND)

Vulnerability Details:
PGP public keys allow to specify arbitrary "User ID" information that gets encoded to the public key and is presented to OX Guard users at "Guard PGP Settings". Public keys containing such content are still valid. Therefor they can be distributed and in case the uid field contains javascript code, they can be used to inject code.

Risk:
Malicious script code can be executed within a users context. This can lead to session hijacking or triggering unwanted actions via the web interface (sending mail, deleting data etc.). The vulnerability may be used to hide and store malicious content that got injected via another vulnerablity or social engineering.

Solution:
Users should update to the latest patch releases 2.0.0-rev11 or later.
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