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IBM Products ctstrtcasd Local File Corruption Vulnerability
Secunia Advisory: SA12664
Release Date: 2004-09-28
Last Update: 2004-10-21
Popularity: 8,954 views

Critical:
Less critical
Impact: Privilege escalation
DoS
Where: Local system
Solution Status: Partial Fix

OS:AIX 5.x
IBM Hardware Management Console (HMC)

Software:IBM Cluster Systems Management 1.x
IBM General Parallel File System (GPFS) 2.x
IBM Tivoli System Automation for Multiplatforms 1.x

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CVE reference:CVE-2004-0828


Description:
iDEFENSE Labs has reported a vulnerability in various IBM products, which can be exploited by malicious, local users to conduct certain actions on a vulnerable system with escalated privileges.

The vulnerability is caused due to an input validation error in ctstrtcasd, which is part of the Reliable Scalable Cluster Technology (RSCT) system, and can be exploited by specifying an arbitrary file as argument to the "-f" command line option.

Successful exploitation allows creation or corruption of arbitrary local files with "root" privileges.

The vulnerability reportedly affects the following products:
* IBM AIX 5L Version 5.2 on pSeries
* IBM AIX 5L Version 5.3 on pSeries
* IBM AIX 5L Version 5.2, 5.3 on an i5/OS (iSeries) partition
* IBM Tivoli System Automation (TSA) for Linux 1.1
* IBM Tivoli System Automation (TSA) for Multiplatforms 1.2
* IBM Cluster Systems Management (CSM) for Linux Version 1.4 (version 1.4 and greater)
* IBM Hardware Management Console (HMC) for pSeries Version 3
* IBM Hardware Management Console (HMC) for pSeries Version 4
* IBM General Parallel File System (GPFS) Version 2 Release 2 on Linux for xSeries and Linux for pSeries

Solution:
Apply fixes or use workarounds.

AIX 5.2 (APAR IY61950):
http://www-912.ibm.com/eserver/support/fixes/fcgui.jsp

AIX 5.3 (APAR IY61770):
http://www-912.ibm.com/eserver/support/fixes/fcgui.jsp

TSA for Linux 1.1:
A fix is not currently available. Remove the setuid bit from "/usr/sbin/rsct/bin/ctstrtcasd".

TSA for Multiplatforms 1.2:
Apply TSA PTF 2 (version number 1.2.0.2) for TSA Multiplatforms 1.2.

Cluster Systems Management on Linux (CSM PTF 1.4.0.3):
https://techsupport.services.ibm.com/server/cluster/fixes/csmfixhome.html

HMC Version Release 3.0, 3.1, and 3.2:
http://techsupport.services.ibm.com/s...mc/power4/fixes/mcode/sf_u800398.html

HMC Version 4 Release 1.0 and 2.0:
ftp://techsupport.services.ibm.com/eserver/pseries/hmc/fixes/MH00148.zip

General Parallel File System (GPFS):
A fix is not currently available. Remove the setuid bit from "/usr/sbin/rsct/bin/ctstrtcasd".

Provided and/or discovered by:
iDEFENSE Labs

Changelog:
2004-10-21: Updated "Solution" section.

Original Advisory:
IBM:
https://techsupport.services.ibm.com/...d+local+file+corruption+vulnerability

iDEFENSE:
http://www.idefense.com/application/poi/display?id=144&type=vulnerabilities


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