[guru-merlin] labs-no-reply@idefense.com: iDEFENSE Security Advisory 08.29.05: Adobe Version Cue VCNative Vulnerabilities
DATE: Wed, 31 Aug 2005 10:07:00 +0200
Az iDEFENSE két biztonsági hibát is talált az Adobe Version Cue rendszerének
VCNative alkalmazásában. A program setuid root, így mindkét hiba különösen
veszélyes. Az első hiba lényege, hogy a program parancssorból elfogadja a
rutinkönyvtárak nevét, amit majd betölt és használ. A második hiba pedig az,
hogy a napló állományt előre jósolható néven hozza létre az aktuális
könyvtárban és követi a symlink-eket is.
Adobe Version Cue VCNative Arbitrary Library Loading Vulnerability
iDEFENSE Security Advisory 08.29.05
www.idefense.com/application/poi/display?id=296&type=vulnerabilities
August 29, 2005
I. BACKGROUND
Adobe Version Cue is a software version tracking system for Adobe
products distributed with Adobe Creative Suite and select Adobe
products.
II. DESCRIPTION
Local exploitation of a design error in Adobe Systems, Inc. Version Cue
allows local attackers to gain root privileges. Version Cue includes a
setuid root application named VCNative which contains a design error
that allows local attackers to gain root privileges. The vulnerability
specifically exists due to an unchecked command line option parameter.
The "-lib" command line option allows users to specify library
"bundles" which allows for the introduction of arbitrary code in the
context of a root owned process. The init function in a shared library
is executed immediately upon loading. By utilizing the "-lib" argument
to load a malicious library, local attackers can execute arbitrary code
with root privileges.
III. ANALYSIS
Successful exploitation allows local attackers to execute arbitrary
code with root privileges. The attack method is trivial and requires no
specialized exploit code or skill by the attacker. Simply compiling a
shared library with malicious code is all that is required to gain
control of the system.
It should be noted that VCNative must connect to a valid host before
loading libraries. The vulnerability is not exposed if VCNative has not
been configured with a proper host value. In addition, the
vulnerability affects only the Apple OS X platform and is only
installed with Adobe Creative Suite or other Adobe products.
IV. DETECTION
iDEFENSE Labs has confirmed the existence of this vulnerability in
Adobe Version Cue version 1 on the Apple OS X platform.
V. WORKAROUND
As a workaround solution, remove the setuid bit from the VCNative
binary and execute the application as a root user when necessary.
VI. VENDOR RESPONSE
Adobe Version Cue Update 2 which addresses this vulnerability, is
available for download at:
http://www.adobe.com/support/downloads/detail.jsp?ftpID=2985
The vendor advisory for this vulnerability is located at:
http://www.adobe.com/support/techdocs/327129.html
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-1843 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
06/27/2005 Initial vendor notification
06/27/2005 Initial vendor response
08/29/2005 Public disclosure
IX. CREDIT
vade79 (http://fakehalo.us) is credited with this discovery.
Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp
Free tools, research and upcoming events
http://labs.idefense.com
X. LEGAL NOTICES
Copyright (c) 2005 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.
Adobe Version Cue VCNative Arbitrary File Overwrite Vulnerability
iDEFENSE Security Advisory 08.29.05
www.idefense.com/application/poi/display?id=297&type=vulnerabilities
August 29, 2005
I. BACKGROUND
Adobe Version Cue is a software version tracking system for Adobe
products distributed with Adobe Creative Suite and select Adobe
products.
II. DESCRIPTION
Local exploitation of a design error in Adobe Systems, Inc. Version Cue
allows local attackers to gain root privileges. Version Cue includes a
setuid root application named VCNative which is vulnerable to a symlink
attack. The vulnerability specifically exists due to the use of
predictable log file names. VCNative uses a format such as
"VCNative-[pid].log" for the filename and stores the file in the
current working directory. Attackers can easily predict the created
filename and supply user-controlled data via the "-host" and "- port"
options. A carefully supplied value can cause a crafted "log file" to
be written. Crafted strings written to root-owned files can lead to
arbitrary code execution with root privileges.
III. ANALYSIS
Successful exploitation allows local attackers to write to arbitrary
files with user-supplied data. Data written to the linked file will
include some corrupted data as well as user-suppplied data, potentially
corrupting a file completely and preventing the execution of system
commands. In addition, a carefully crafted input value can be used in
conjunction with standard system tools such as cron to gain root
privileges.
A workaround solution has been provided for this vulnerability. In
addition, the vulnerability affects only the Apple OS X platform and is
only installed with Adobe Creative Suite or other Adobe products.
IV. DETECTION
iDEFENSE Labs has confirmed the existence of this vulnerability in
Adobe Version Cue version 1 on the Apple OS X platform.
V. WORKAROUND
As a workaround solution, remove the setuid bit from the VCNative
binary and execute the application as a root user when necessary.
VI. VENDOR RESPONSE
Adobe Version Cue Update 2 which addresses this vulnerability, is
available for download at:
http://www.adobe.com/support/downloads/detail.jsp?ftpID=2985
The vendor advisory for this vulnerability is located at:
http://www.adobe.com/support/techdocs/327129.html
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CAN-2005-1842 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
06/27/2005 Initial vendor notification
06/27/2005 Initial vendor response
08/29/2005 Public disclosure
IX. CREDIT
vade79 (http://fakehalo.us) is credited with this discovery.
Get paid for vulnerability research
http://www.idefense.com/poi/teams/vcp.jsp
Free tools, research and upcoming events
http://labs.idefense.com
X. LEGAL NOTICES
Copyright (c) 2005 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.