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AUSCERT External Security Bulletin Redistribution
ESB-2008.0570 -- [Solaris]
Two Security Vulnerabilities in samba(7) WINS Server Daemon (nmbd) May
Allow Execution of Arbitrary Code or Lead to a Denial of
Service (DoS) Condition
13 June 2008
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AusCERT Security Bulletin Summary
---------------------------------
Product: samba WINS Server Daemon (nmbd)
Publisher: Sun Microsystems
Operating System: Solaris
Impact: Execute Arbitrary Code/Commands
Denial of Service
Access: Remote/Unauthenticated
CVE Names: CVE-2007-5398 CVE-2007-4572
Ref: AL-2007.0120
Original Bulletin:
http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-237764-1
Revision History: June 13 2008: Resolution made available
June 2 2008: Initial Release
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Solution Type: Sun Alert
Solution 237764 : Two Security Vulnerabilities in samba(7) WINS
Server Daemon (nmbd) May Allow Execution of Arbitrary Code or Lead to
a Denial of Service (DoS) Condition
Bug ID: 6630358
Product
Solaris 9 Operating System, Solaris 10 Operating System
Date of Workaround Release: 30-May-2008
Date of Resolved Release: 11-Jun-2008
SA Document Body
Two Security Vulnerabilities in samba(7) WINS Server Daemon (see details
below)
1. Impact
Two security vulnerabilities in the samba(7) WINS server daemon (nmbd)
may allow a remote unprivileged user to execute arbitrary code with
the privileges of the Samba nmbd daemon or lead to a Denial of Service
(DoS) to the Samba WINS service.
These issues are described in the following documents:
* CVE-2007-4572 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4572
* CVE-2007-5398 at:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5398
2. Contributing Factors
These issues can occur in the following releases:
SPARC Platform
* Solaris 9 without patch 114684-11
* Solaris 10 without patch 119757-10
x86 Platform
* Solaris 9 without patch 114685-11
* Solaris 10 without patch 119758-10
Notes:
1. Solaris 8 does not bundle the Samba software and hence is not
affected by these issues.
2. These issues only affect systems running Samba 3.0.0 through
3.0.26a.
3. These issues only impact systems configured as a Samba server
running as WINS server.
To determine if a system is configured as a Samba server, the
following command can be run to check for processes related to Samba:
% ps -ef | grep mbd
root 317 1 0 May 26 ? 0:01
/usr/sfw/sbin/smbd -D
root 325 317 0 May 26 ? 0:00
/usr/sfw/sbin/smbd -D
root 314 1 0 May 26 ? 0:27
/usr/sfw/sbin/nmbd -D
root 28369 17382 0 23:17:46 pts/2 0:00 grep mbd
If the output shows "smbd" or "nmbd" running as a daemon (with the -D
parameter), the system is configured as a Samba server.
To determine the version of Samba installed on a system, the following
command can be run:
% /usr/sfw/sbin/smbd -V
Version 3.0.4
To determine if the Samba server is running as a Samba WINS server,
the following steps may be used:
1. Verify that the process "/usr/sfw/sbin/nmbd -D" is running. This
may be done by using the ps(1) command as indicated above.
2. Verify that the "wins support" configuration parameter is set to
"yes" in the "/etc/sfw/smb.conf" file.
3. Symptoms
If the issue described in CVE-2007-4572 is exploited, the "nmbd"
process may hang or the WINS server may stop servicing WINS names.
There are no predictable symptoms to indicate that the issue described
in CVE-2007-5398 has been exploited to execute arbitrary code.
4. Workaround
To work around these issues, stop running the Samba server as a WINS
Server. This may achieved by modifying the "wins support" entry in the
"/etc/sfw/smb.conf" configuration file to "no".
Note: The Samba server must be restarted after making this
modification for the changes to take effect.
5. Resolution
These issues are addressed in the following releases:
SPARC Platform
* Solaris 9 with patch 114684-11 or later
* Solaris 10 with patch 119757-10 or later
x86 Platform
* Solaris 9 with patch 114685-11 or later
* Solaris 10 with patch 119758-10 or later
For more information on Security Sun Alerts, see Technical
Instruction ID 213557
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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved
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