From: "NGSSoftware Insight Security Research" <nisr@nextgenss.com.>
To: <bugtraq@securityfocus.com.>, <dbsec@freelists.org.>
Subject: SQLIDEBUG envariable overflow on Informix
Date: Mon, 14 Aug 2006 17:25:12 +0100
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NGSSoftware Insight Security Research Advisory
Name: SQLIDEBUG envariable overflow on Informix
Systems Affected: 9.40.xC6 and earlier and 10.00.xC2, C1
Severity: High
Vendor URL: http://www.ibm.com/
Author: David Litchfield [ [email protected] ]
Date of Public Advisory: 2nd August 2006
Advisory number: #NISR02082006G
CVEID: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3862
Advisory URL: http://www.ngssoftware.com/research/
Description
***********
Informix Dynamic Server is a database developed by IBM. During a security
assessment of Informix it was discovered that an overflow could be triggered
in a shared library with the SQLIDEBUG environment variable. This can be
triggered to gain root privileges by accessing one of the setuid root
binaries such as onmode.
Details
*******
There's a buffer overflow in most of the setuid root programs in Informix
running on Linux. The problem arises due to an overly long SQLIDEBUG
environment variable of the form
SQLIDEBUG=1:/long-file-name
At bytes 272-6 in the long "filename" the saved return address on the stack
is overwritten.
Fix Information
***************
IBM was alerted to this flaw on the 13th January 2005. Patches have now been
made available.
NGSSQuirreL for Informix, an advanced vulnerability assessment scanner
designed specifically for Informix, can be used to accurately determine
whether your servers are vulnerable to this flaw. More information about
NGSSQuirreL for Informix can be found here
http://www.ngssoftware.com/products/database-security/ngs-squirrel-informix.php
About NGSSoftware
*****************
NGSSoftware develops vulnerability assessment and compliancy tools for
database servers including Oracle, Microsoft SQL Server, DB2, Sybase and
Informix. Headquartered in the United Kingdom NGS has offices in London, St.
Andrews (UK), Sydney, Brisbane, and Perth (Australia) and Texas in the
United States; NGSConsulting provide services to some of the largest and
most demanding organizations around the globe.
http://www.ngssoftware.com/
Telephone +44 208 401 0070
Fax +44 208 401 0076
[email protected]
