[UNIX] Sun AnswerBook2 Gettransbitmap Buffer Overflow Vulnerability

From: support@securiteam.com
Date: 05/21/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Tue, 21 May 2002 08:39:44 +0200 (CEST)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Sun AnswerBook2 Gettransbitmap Buffer Overflow Vulnerability
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SUMMARY

Sun <http://www.sun.com/software/ab2/> AnswerBook2 is vulnerable to a
stack based buffer overflow condition that can allow a remote attacker to
execute arbitrary code. The problem is due to the gettransbitmap CGI that
comes with AnswerBook2 not correctly performing bounds checking on the
filename argument. A remote attacker can create a request that will result
in arbitrary code execution with user daemon privileges.

DETAILS

Vulnerable systems:
 * Sun AnswerBook2 versions 1.4, 1.4.1, 1.4.2, 1.4.3

Technical Recommendation:
Presently, there are no vendor patches available. As a workaround
solution, remove access to the gettransbitmap binary.

#chmod 0000 <path to>/gettransbitmap

Otherwise, disable AnswerBook2.

Vendor Status:
Vendor notified.

ADDITIONAL INFORMATION

The information has been provided by
<mailto:researchteam@esecurityonline.com> Kevin Kotas.

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