From: SecuriTeam <support@securiteam.com.>
To: [email protected]
Date: 24 Feb 2005 17:49:17 +0200
Subject: [UNIX] Arbitrary File Corruption Vulnerability in Sun Solaris kcms_configure
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Arbitrary File Corruption Vulnerability in Sun Solaris kcms_configure
------------------------------------------------------------------------
SUMMARY
The kcms_configure utility is "part of the Kodak Color Management System
(KCMS) package that is included with Solaris. It is installed setuid root
by default".
Local exploitation of a race condition in the Kodak Color Management
System's kcms_configure script packaged with Sun Microsystems Inc.
Solaris operating system can allow for the corruption of arbitrary files
on the system.
DETAILS
Vulnerable Systems:
* Sun Solaris version 8, 9 (10 pre-release suspected)
Local exploitation of a race condition in the Kodak Color Management
System's kcms_configure script packaged with Sun Microsystems Inc. Solaris
operating system can allow for the corruption of arbitrary files on the
system.
The problem specifically exists due to logging errors within
kcms_configure, a set user id (setuid) root script. The file KCS_ClogFile
will be written to if it exists in the current directory. Due to a lack of
sanity checking a local attacker can redirect log file output to an
arbitrary file on the system through the usage of symbolic links. By
specifying an invalid monitor profile argument the attacker can force an
error log entry to be written.
Successful exploitation allows local attackers to corrupt arbitrary files
on the system. Attackers can use this ability to append to important
system files, possibly resulting in a denial of service or local privilege
elevation.
Workaround:
Remove the setuid bit from kcms_configure:
# chmod -s /usr/openwin/bin/kcms_configure
Vendor response:
This issue is addressed in Sun Alert
<http://www.sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57706-1>; ID #57706.
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0481>;
CAN-2004-0481
Disclosure Timeline:
* 04/27/2004 - Initial vendor notification.
* 04/27/2004 - Initial vendor response.
* 02/23/2005 - Public disclosure.
ADDITIONAL INFORMATION
The information has been provided by
<mailto:idlabs-advisories@idefense.com.> iDEFENSE.
The original article can be found at:
<http://www.idefense.com/application/poi/display?id=206&type=vulnerabilities>; http://www.idefense.com/application/poi/display?id=206&type=vulnerabilities
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