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             AUSCERT External Security Bulletin Redistribution

                        ESB-2006.0740 -- [Solaris]
         Security Vulnerability in Solaris 10 Link Aggregation may
             Allow Local Users Total Access to Network Packets
                              9 October 2006

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:              Solaris 10
Publisher:            Sun Microsystems
Operating System:     Solaris 10
Impact:               Access Confidential Data
                      Provide Misleading Information
Access:               Existing Account

Original Bulletin:    http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102606-1

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Sun(sm) Alert Notification
     * Sun Alert ID: 102606
     * Synopsis: Security Vulnerability in Solaris 10 Link Aggregation
       may Allow Local Users Total Access to Network Packets
     * Category: Security
     * Product: Solaris 10 Operating System
     * BugIDs: 6364350
     * Avoidance: Patch
     * State: Resolved
     * Date Released: 06-Oct-2006
     * Date Closed: 06-Oct-2006
     * Date Modified: 

1. Impact

   A security vulnerability resulting from incorrect and insufficient
   permission checks in the default Solaris 10 configuration may allow a
   local unprivileged user to create a raw socket on a Solaris link
   aggregation, resulting in unrestricted access to network packets.

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 10 without patch 118833-23

   x86 Platform
     * Solaris 10 without patch 118855-19

   Note: This issue does not affect Solaris 8 or Solaris 9.

   This issue only affects systems which have configured aggregations of
   network devices using dladm(1M) and enabled with ifconfig(1M).  To
   determine if a system has configured one or more aggregations of
   network devices the following command can be run as the root user or a
   user with the sys_net_config privilege:
    # /usr/sbin/dladm show-aggr
       key: 1 (0x0001) policy: L4      address: 0:1:2:3:4:5 (auto)
       device       address           speed         duplex  link state
       bge1         0:1:2:3:4:5       100   Mbps    full    up      attached
       bge2         0:1:2:3:4:5       100   Mbps    full    up      attached
       bge3         0:1:2:3:4:5       100   Mbps    full    up      attached
    # /usr/sbin/ifconfig aggr1
       aggr1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index
 143
       inet 192.29.67.199 netmask ffffff00 broadcast 192.29.67.255
       ether 0:1:2:3:4:5


3. Symptoms

   There are no reliable symptoms that would show if this issue has been
   exploited to access network traffic or send spoofed packets using a
   network link aggregation. 

4. Relief/Workaround

   To create a policy for local users that would not allow them total
   access, add an entry into the /etc/security/device_policy file by
   running the update_drv(1M) command as superuser with the following
   arguments:
   # /usr/sbin/update_drv -a -p 'read_priv_set=net_rawaccess write_priv_set=net
_rawaccess' aggr


5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 10 with patch 118833-23 or later

   x86 Platform
     * Solaris 10 with patch 118855-19 or later

   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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===========================================================================
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