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Date: Thu, 03 Apr 2008 18:47:32 -0400 From: iDefense Labs <labs-no-reply@...fense.com> To: vulnwatch@...nwatch.org, full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com Subject: iDefense Security Advisory 04.03.08: SCO UnixWare pkgadd Directory Traversal Vulnerability iDefense Security Advisory 04.03.08 http://labs.idefense.com/intelligence/vulnerabilities/ Apr 03, 2008 I. BACKGROUND SCO UnixWare is a UNIX operating system that runs on many OEM platforms. The pkgadd command is used to install packages on the system. More information about the product is available from the URL shown below. http://www.sco.com/products/unixware714/ II. DESCRIPTION Local exploitation of a directory traversal vulnerability within the pkgadd program distributed with SCO Group Inc's UnixWare operating system allows attackers to gain root privileges. By setting an environment variable to a value containing directory traversal sequences, such as "../", an attacker can cause the program to create or append to arbitrary files on the system. III. ANALYSIS Exploitation allows attackers gain root privileges. Access to execute arbitrary shell commands is required to exploit this issue. By targeting specific system files, an attacker can add accounts or otherwise facilitate privilege escalation. IV. DETECTION iDefense confirmed the existence of this vulnerability within version 7.1.4 of UnixWare with all patches available as of August 27th, 2007 installed. Previous versions are suspected to be vulnerable. V. WORKAROUND Changing the permissions of the pkgadd command to only allow root to execute this program will prevent exploitation of this vulnerability. # chmod 700 /usr/sbin/pkgadd VI. VENDOR RESPONSE SCO has addressed this vulnerability by releasing patches. For more information, consult their advisory at the following URL. http://www.sco.com/support/update/download/release.php?rid=324 VII. CVE INFORMATION The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2008-0310 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 09/04/2007 Initial vendor notification 10/30/2007 Initial vendor response 04/03/2008 Coordinated public disclosure IX. CREDIT The discoverer of this vulnerability wishes to remain anonymous. Get paid for vulnerability research http://labs.idefense.com/methodology/vulnerability/vcp.php Free tools, research and upcoming events http://labs.idefense.com/ X. LEGAL NOTICES Copyright © 2008 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 e-mail customerservice@...fense.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. _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
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