[VulnWatch] iDefense Security Advisory 02.07.06: QNX Neutrino RTOS su Command Buffer Overflow
- From: "labs-no-reply@xxxxxxxxxxxx" <labs-no-reply@xxxxxxxxxxxx>
- Date: Tue, 07 Feb 2006 18:51:41 -0500
QNX Neutrino RTOS su Command Buffer Overflow
iDefense Security Advisory 02.07.06
February 7, 2006
QNX Software Systems Ltd.'s Neutrino RTOS (QNX) is a real-time operating
system designed for use in embedded systems. More information is
Local exploitation of a buffer overflow in QNX Neutrino RTOS's (QNX)
'su' command allows attackers to gain root privileges. The problem
specifically exists in the parsing of a long string passed as the first
argument to the set user id (setuid) binary 'su'. The 'su' command is
intended for running commands under a substitute user or group id. A
string larger then approximately 4000 bytes causes a stack overflow
directly overwriting the stored return address and allowing an attacker
to seize CPU control and eventually execute arbitrary code under root
Any authenticated local attacker can exploit this vulnerability to gain
super-user (root) privileges on the affected system.
iDefense has confirmed the existence of these vulnerabilities in QNX
Neutrino RTOS version 6.2.0. Earlier versions are suspected to be
susceptible to exploitation as well.
Clear the set user id or execute bits from the affected binary or remove
VI. VENDOR RESPONSE
The vendor has not responded to communication regarding this issue.
VII. CVE INFORMATION
A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not
been assigned yet.
VIII. DISCLOSURE TIMELINE
06/04/2004 Initial vendor notification
02/07/2006 Public disclosure
Texonet (www.texonet.com) is credited with this discovery.
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X. LEGAL NOTICES
Copyright © 2006 iDefense, Inc.
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Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
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