IBM Pegasus CIM Server for Director on AIX vulnerabilities
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IBM SECURITY ADVISORY
First Issued: Thu Feb 21 10:43:47 CST 2008
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VULNERABILITY SUMMARY
VULNERABILITY: IBM Pegasus CIM Server for Director on AIX vulnerabilities.
PLATFORMS: AIX 5.2, 5.3, 6.1
SOLUTION: Apply the fix or workaround as described below.
THREAT: A remote attacker may run arbitrary code with root privileges,
and/or cause a Denial of Service (DoS) attack.
CERT VU Number: n/a
CVE Number: CVE-2008-0003, CVE-2008-0495
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DETAILED INFORMATION
I. OVERVIEW
IBM Pegasus CIM Server for Director provides common information model
(CIM) object management. This is a framework supporting Web-Based
Enterprise Management (WBEM) services. WBEM is a platform and resource
independent standard from the Distributed Management Task Force (DMTF).
WBEM defines a CIM, and communication protocol for resource monitoring
and control.
Two vulnerabilities have been addressed in the IBM Pegasus CIM Server
for Director. The first is a stack buffer overflow flaw found in the PAM
authentication code in the CIM management server. The second is a Denial
of Service (DoS) vulnerability against the CIM service daemon itself.
II. DESCRIPTION
A stack-based buffer overflow vulnerability exists in the IBM Pegasus CIM
Server for Director in which an unauthenticated remote user could trigger
this flaw and potentially execute arbitrary code with root privileges
(CVE-2008-0003). In addition a denial-of-service (DoS) issue exists in
the IBM Pegasus CIM Server for Director.
III. IMPACT
The successful exploitation of these vulnerabilities allows a
non-privileged remote user to execute code with root privileges
and/or cause a denial of service against the CIM server.
IV. PLATFORM VULNERABILITY ASSESSMENT
To determine if your system is vulnerable, run the following commands:
lslpp -L sysmgt.pegasus.cimserver.rte
The following fileset levels are vulnerable for all supported versions
of AIX:
AIX Fileset Fileset Levels
—————————————————————-
sysmgt.pegasus.cimserver.rte 2.5.1.20
2.5.1.21
2.5.1.30
sysmgt.pegasus.cimserver.rte 2.6.1.0
2.6.1.1
V. SOLUTIONS
A. Installable images including these fixes for AIX 5.3 and AIX 6.1 will
be available for IBM Pegasus CIM Server on the IBM Director Download
website approximately in April 2008. These images will install
fileset ’sysmgt.cimserver.pegasus.rte’ level 2.6.1.20.
B. INTERIM FIXES
Interim Fixes are available. The fixes can be downloaded in two ways:
1. Via HTTP or Download Director from the IBM Director Web Download
Site:
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=dmp
NOTE: Once logged in to the site, the fixes can be located
using the following steps:
Fixes for Pegasus 2.6.1 on AIX:
- Select IBM Director for AIX and accept the license.
- Find the fixes in the IBM Pegasus CIM Server for Director on
AIX section:
AIX 5.2: Efix_644427.080123_AIX5.2.tar.gz
AIX 5.3: Efix_644427.080123_AIX5.3_6.1.tar.gz
AIX 6.1: Efix_644427.080123_AIX5.3_6.1.tar.gz
Fixes for Pegasus 2.5.1 on AIX:
- Select IBM Director-Archives.
- Find the fixes in the IBM Director for AIX and Linux on
POWER section:
AIX (all versions): Efix_641416.080123_AIX.tar.gz
Install instructions are included in the file:
CIM_Pegasus_Providers_AIX.README.html
2. Via FTP from the AIX Software Download Site:
ftp://aix.software.ibm.com/aix/efixes/security/pegasus_ifix.tar
The link above is to a tar file containing this signed
advisory, interim fix packages, and PGP signatures for each
package. The interim fixes below include prerequisite
checking. This will enforce the correct mapping between the
fixes and AIX Technology Levels.
Version AIX Release Interim fix
—————————————————————–
Pegasus 2.5.1 All Efix_641416.080123_AIX.tar.gz
Pegasus 2.6.1 5.2 Efix_644427.080123_AIX5.2.tar.gz
Pegasus 2.6.1 5.3, 6.1 Efix_644427.080123_AIX5.3_6.1.tar.gz
To extract the fixes from the tar file:
tar xvf pegasus_ifix.tar
cd pegasus_ifix
IMPORTANT: If possible, it is recommended that a mksysb backup
of the system be created. Verify it is both bootable and
readable before proceeding.
These interim fixes have not been fully regression tested;
thus, IBM does not warrant the fully correct functionality of
the interim fix.
Verify you have retrieved the fixes intact:
The checksums below were generated using the “sum”, “cksum”,
“csum -h MD5″ (md5sum), and “csum -h SHA1″ (sha1sum) commands
and are as follows:
sum filename
- ————————————
53770 3610 Efix_641416.080123_AIX.tar.gz
47815 169 Efix_644427.080123_AIX5.2.tar.gz
33258 169 Efix_644427.080123_AIX5.3_6.1.tar.gz
cksum filename
- ——————————————
4271833127 3695746 Efix_641416.080123_AIX.tar.gz
1284858963 172713 Efix_644427.080123_AIX5.2.tar.gz
2454864014 172998 Efix_644427.080123_AIX5.3_6.1.tar.gz
csum -h MD5 (md5sum) filename
- ———————————————————-
8d71ff3be9f60722d4f158bb0e5c2558 Efix_641416.080123_AIX.tar.gz
3aadb16572166fd190a6fb63ddbf85da Efix_644427.080123_AIX5.2.tar.gz
04c876224b116e2c23778ca941669e29 Efix_644427.080123_AIX5.3_6.1.tar.gz
csum -h SHA1 (sha1sum) filename
- ——————————————————————
1b9edb622a24c06cf8155fd836235a4a337fbfaf Efix_641416.080123_AIX.tar.gz
3c69ca8f6213312c4179e6e026cd3ebe8469b7ed Efix_644427.080123_AIX5.2.tar.gz
022a84b9bd0710bce3dc295b96ddeb0214355563 Efix_644427.080123_AIX5.3_6.1.tar.gz
To verify the sums, use the text of this advisory as input to
csum, md5sum, or sha1sum. For example:
csum -h SHA1 -i Advisory.asc
md5sum -c Advisory.asc
sha1sum -c Advisory.asc
These sums should match exactly. The PGP signatures in the tar
file and on this advisory can also be used to verify the
integrity of the fixes. If the sums or signatures cannot be
confirmed, contact IBM AIX Security at
security-alert@austin.ibm.com and describe the discrepancy.
C. INTERIM FIX INSTALLATION
Please refer to the installation instructions in the following
files:
Efix_641416_readme.html
Efix_644427_readme.html
VI. WORKAROUNDS
There are no workarounds for these vulnerabilities other than
uninstalling the affected software.
VII. OBTAINING FIXES
Security related Interim Fixes can be downloaded from:
ftp://aix.software.ibm.com/aix/efixes/security