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iDefense Security Advisory 02.07.06: QNX Neutrino RTOS passwd Command Buffer Overflow
From: "labs-no-reply () idefense com" <labs-no-reply () idefense com>
Date: Tue, 07 Feb 2006 18:55:29 -0500
QNX Neutrino RTOS passwd Command Buffer Overflow
iDefense Security Advisory 02.07.06
February 7, 2006
QNX Neutrino RTOS is a real-time operating system designed for use in
embedded systems. More information about is available at
Local exploitation of a buffer overflow in QNX Neutrino RTOS's (QNX)
'passwd' 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 'passwd'. The 'passwd'
command is intended for changing a users password. 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 privileges.
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.
Permission is granted for the redistribution of this alert
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part of this alert in any other medium other than electronically, please
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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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- iDefense Security Advisory 02.07.06: QNX Neutrino RTOS passwd Command Buffer Overflow labs-no-reply () idefense com (Feb 07)