[Full-disclosure] iDefense Security Advisory 02.07.06: QNX Neutrino RTOS crttrap Arbitrary Library Loading Vulnerability

2006-02-08T00:00:00
ID SECURITYVULNS:DOC:11344
Type securityvulns
Reporter Securityvulns
Modified 2006-02-08T00:00:00

Description

QNX Neutrino RTOS crttrap Arbitrary Library Loading Vulnerability

iDefense Security Advisory 02.07.06 http://www.idefense.com/intelligence/vulnerabilities/display.php?id=379 February 7, 2006

I. BACKGROUND

QNX Software Systems Ltd.'s Neutrino RTOS (QNX) is a real-time operating system designed for use in embedded systems. More information is available at:

http://www.qnx.com/products/rtos/

II. DESCRIPTION

Local exploitation of an arbitrary library loading vulnerability in QNX Neutrino RTOS's (QNX) crttrap command allows attackers to gain root privileges.

The vulnerability specifically exists because crttrap trusts the LD_LIBRARY_PATH that a user supplies. A local attacker can create a malicious replacement for certain libraries and cause the replacement to be loaded in place of the original by manipulating the LD_LIBRARY_PATH environment variable. The crttrap binary is installed set user id root by default.

III. ANALYSIS

Successful exploitation provides local attackers with super-user privileges on the affected system, allowing for complete control. The system must be in text mode to exploit this vulnerability.

IV. DETECTION

iDefense has confirmed the existence of these vulnerabilities in QNX Neutrino RTOS version 6.2.1. Earlier versions are also suspected to be susceptible to exploitation.

V. WORKAROUND

Clear the set user ID or execute bits from the affected binary or remove it entirely.

VI. VENDOR RESPONSE

The vendor has not responded to communication regarding this issue.

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CAN-2005-1528 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems.

VIII. DISCLOSURE TIMELINE

05/12/2005 Initial vendor notification 02/07/2006 Public disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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X. LEGAL NOTICES

Copyright © 2006 iDefense, Inc.

Permission is granted for the redistribution of this alert electronically. It may not be edited in any way without the express written consent of iDefense. If you wish to reprint the whole or any part of this alert in any other medium other than electronically, please email customerservice@idefense.com for permission.

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, this information.


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