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AUSCERT External Security Bulletin Redistribution
ESB-2007.0480 -- [Solaris]
Security Vulnerability in the Kerberos Administration Daemon
(kadmind(1M)) May Lead to Arbitrary Code Execution
20 August 2007
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AusCERT Security Bulletin Summary
---------------------------------
Product: kadmind
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Root Compromise
Access: Existing Account
CVE Names: CVE-2007-2798
Ref: AL-2007.0078
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102985-1
Revision History: August 20 2007: Issue resolved
August 7 2007: SEAM 1.0.1 for Solaris 8 patch released
July 20 2007: Solairs 10 x86 Patch Released
July 16 2007: SPARC Patch Released
June 29 2007: Initial Release
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Sun(sm) Alert Notification
* Sun Alert ID: 102985
* Synopsis: Security Vulnerability in the Kerberos Administration
Daemon (kadmind(1M)) May Lead to Arbitrary Code Execution
* Category: Security
* Product: Solaris 9 Operating System, Solaris 10 Operating System,
Solaris 8 Operating System
* BugIDs: 6562672
* Avoidance: Patch
* State: Resolved
* Date Released: 27-Jun-2007, 15-Aug-2007
* Date Closed: 15-Aug-2007
* Date Modified: 12-Jul-2007, 18-Jul-2007, 31-Jul-2007, 15-Aug-2007
1. Impact
A security vulnerability in the Kerberos administration daemon
(kadmind(1M)) may allow a remote authenticated user to be able to
execute arbitrary commands on Kerberos Key Distribution Center(KDC)
systems with the privilegs of the kadmind(1M) daemon (usually root).
This issue may also allow the remote user to compromise the Kerberos
key database or cause the kadmind(1M) daemon to crash, which is a form
of Denial of Service (DoS).
This issue is referenced in the following documents:
* http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2007-005.txt
* CVE-2007-2798 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-2798
2. Contributing Factors
This issue can occur in the following releases:
SPARC Platform
* SEAM 1.0.1 (for Solaris 8) without patch 110060-22
* Solaris 9 without patch 112925-07
* Solaris 10 without patch 120473-12
x86 Platform
* SEAM 1.0.1 (for Solaris 8) without patch 110061-22
* Solaris 9 without patch 116044-04
* Solaris 10 without patch 120037-22
Note 1: Solaris Enterprise Authentication Mechanism (SEAM) is an
unbundled product available for Solaris 8 and 9. For more information
on SEAM, please see the SEAM(5) man page.
Note 2: To determine if the SEAM unbundled product is installed on a
host, the following command can be used:
$pkginfo SUNWkr5ma
system SUNWkr5ma Kerberos V5 Master KDC
Note 3: This issue only occurs if the system is configured as a Key
Distribution Center (KDC).
To determine if the system is configured as a Key Distribution Center,
the following command can be used:
% ps -ef | grep kadmin
root 321 1 0 Dec 10 ? 0:00
/usr/krb5/lib/kadmind
If the above command shows that the daemon kadmind(1M) is running,
then the machine is configured as the Key Distribution Center (KDC).
3. Symptoms
There are no reliable symptoms that would indicate this issue has been
exploited to execute arbitrary code with elevated privileges on a
system.
4. Relief/Workaround
To work around the described issue, kadmind(1M) could be disabled,
however this would take down all administrative functionality of the
Kerberos environment. The Kerberos realm itself would remain usable
while kadmind(1M) is down.
To disable kadmind(1M) on Solaris 8 and Solaris 9 systems, the
following command can be used:
# pkill kadmind
5. Resolution
This issue is addressed in the following release:
SPARC Platform
* SEAM 1.0.1 (for Solaris 8) with patch 110060-22 or later
* Solaris 9 with patch 112925-07 or later
* Solaris 10 with patch 120473-12 or later
x86 Platform
* SEAM 1.0.1 (for Solaris 8) with patch 110061-22 or later
* Solaris 9 with patch 116044-04 or later
* Solaris 10 with patch 120037-22 or later
Change History
12-Jul-2007:
* Updated Contributing Factors and Resolution sections
18-Jul-2007:
* Updated Contributing Factors and Resolution sections
31-Jul-2007:
* Updated Contributing Factors and Resolution sections
15-Aug-2007:
* State: Resolved
* Updated Contributing Factors and Resolution sections
This Sun Alert notification is being provided to you on an "AS IS"
basis. This Sun Alert notification may contain information provided by
third parties. The issues described in this Sun Alert notification may
or may not impact your system(s). Sun makes no representations,
warranties, or guarantees as to the information contained herein. ANY
AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. BY ACCESSING THIS DOCUMENT
YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE
OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN.
This Sun Alert notification contains Sun proprietary and confidential
information. It is being provided to you pursuant to the provisions of
your agreement to purchase services from Sun, or, if you do not have
such an agreement, the Sun.com Terms of Use. This Sun Alert
notification may only be used for the purposes contemplated by these
agreements.
Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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