TWSL2011-018: Authentication Bypass Vulnerability in IBM TS3100/TS3200 Web User Interface

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Trustwave's SpiderLabs Security Advisory TWSL2011-018:
Authentication Bypass Vulnerability in IBM TS3100/TS3200 Web User Interface

https://www.trustwave.com/spiderlabs/advisories/TWSL2011-018.txt

Published: 2011-12-20
Version: 1.0

Vendor: IBM (http://www.ibm.com)
Product: TS3100/TS3200 Tape Library
Version affected: Firmware less than A.60

Product description:
Entry-level tape library designed to provide reliable,high capacity, high
performance tape backup.  The TS3100/TS3200 models and its storage
management applications are designed to address capacity, performance, data
protection, reliability, availability, affordability and application
requirements. It is designed as a functionally rich, entry tape-storage
solution incorporating LTO Ultrium tape technology.


Credit: Martin Murfitt of Trustwave SpiderLabs

Finding: Authentication Bypass (Web Management Console)
CVE: CVE-2011-1372

The IBM TS3200/TS3200 Web User Interface is vulnerable to an authentication
bypass attack. By sending a series of requests to the authentication
function, it is possible to trigger a condition which causes the
application to grant an access cookie which permits remote administration.

Repeated queries using the following HTTP query arguments provided
administrative access to the appliance after several tries:

user_level=3&password=aaaaaaaaaaa&login=Log+in'

The password is not believed to be significant. Once access is granted,
the following cookies are set on the client's browser:

Cookie: RMU_LEVEL=3; RMU_LOGIN=9999


Remediation Steps:
Update firmware version to A.60 or above.

Revision History:
1/17/11 - Vulnerability disclosed
11/18/11 - Patch released by vendor
12/20/11 - Advisory published


References
1. http://www-03.ibm.com/systems/storage/tape/ts3200/


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