#101643: Security Vulnerability in Samba(7) Versions Prior to 3.0.10 May Allow Unauthorized Root Privileges (formerly Document ID: 57730)

Sun(sm) Alert Notification

Sun Alert ID: 101643 (formerly 57730)
Synopsis: Security Vulnerability in Samba(7) Versions Prior to 3.0.10 May Allow Unauthorized Root Privileges
Category: Security
Product: Solaris 9 Operating System, Solaris 10 Operating System
BugIDs: 6217228
Avoidance: Patch, Workaround
State: Resolved
Date Released: 24-Jan-2005, 17-Oct-2006
Date Closed: 17-Oct-2006
Date Modified: 13-Jun-2005, 17-Oct-2006

1. Impact

An integer overflow security issue with the Samba(7) smbd(1m) daemon may allow a local or remote authenticated user the ability to execute arbitrary commands with the privileges of Super User (typically root), on a Solaris 9 or Solaris 10 system running as a Samba(7) server.

More information on this issue is available at:

CERT Vulnerability Note VU#226184 at: http://www.kb.cert.org/vuls/id/226184
CVE CAN-2004-1154 at: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-1154
Samba Security Announcement at: http://www.samba.org/samba/security/CAN-2004-1154.html

2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

Solaris 9 without patch 114684-05
Solaris 10 without patch 119757-01

x86 Platform

Solaris 9 without patch 114685-05
Solaris 10 without patch 119758-01

Note: Solaris 7 and Solaris 8 do not include the Samba software and are not affected by this issues. Sun does include Samba on the Solaris Companion CD for Solaris 8 as an unsupported package which installs to "/opt/sfw" and is vulnerable to this issue. Sites using the freeware version of Samba from the Solaris Companion CD will need to upgrade to a later version from Samba.org.

This issue only occurs if all of the following conditions are true:

The system is configured as a Samba server
The version of Samba installed is 2.X through 3.0.9

To determine if a system is configured as a Samba server, use the following command to check for the presence of the smb.conf(4) file:

    % ls -l /etc/sfw/smb.conf     
    -rw-r--r--   1 root  other  11665 Sep 28 16:37 /etc/sfw/smb.conf

If the output is similar to that shown above, 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

3. Symptoms

Unsuccessful exploitation attempts may leave evidence of an attack in system logs.

Solution Summary

Top

4. Relief/Workaround

To work around the described issue, download and compile samba 3.0.10 or higher from Samba.org

Follow the security suggestions from the samba team at: http://www.samba.org/samba/docs/server_security.html.

5. Resolution

This issue is addressed in the following releases:

SPARC Platform

Solaris 9 with patch 114684-05 or later
Solaris 10 with patch 119757-01 or later

x86 Platform

Solaris 9 with patch 114685-05 or later
Solaris 10 with patch 119757-01 or later

Change History

13-Jun-2005:

Updated Product field
Updated Contributing Factors and Resolution sections

17-Oct-2006:

State: Resolved
Updated Contributing Factors and Resolution sections

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