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             AUSCERT External Security Bulletin Redistribution

                        ESB-2009.0107 -- [Solaris]
  A Security Vulnerability in the Solaris ip(7P) Kernel Module's IP-in-IP
          Packet Processing May Lead to a Denial of Service (DoS)
                              6 February 2009

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

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

Product:              ip(7P)
Publisher:            Sun Microsystems
Operating System:     Solaris
                      OpenSolaris
Impact:               Denial of Service
Access:               Existing Account
CVE Names:            CVE-2009-0346

Original Bulletin:    
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-240086-1

Revision History:     February 6 2009: Added CVE Reference
                      January 30 2009: Initial Release

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   Solution Type: Sun Alert

   Solution  240086 :   A Security Vulnerability in the Solaris ip(7P)
   Kernel Module's IP-in-IP Packet Processing May Lead to a Denial of
   Service (DoS)  
        
   Bug ID: 6673488

   Product
   Solaris 9 Operating System
   Solaris 10 Operating System
   OpenSolaris

   Date of Resolved Release: 28-Jan-2009

   SA Document Body

   A Security Vulnerability in the Solaris ip(7P) Kernel Module's IP-in-IP 
   Packet Processing May Lead to a Denial of Service (DoS)

   1. Impact

   A security vulnerability in the Solaris ip(7P) kernel module's
   IP-in-IP packet processing may allow a local unprivileged user to
   cause a system panic, resulting in a Denial of Service (DoS).
   Sun acknowledges with thanks, Evgeny Sonyagin for discovering and
   reporting this issue.

   2. Contributing Factors

   This issue can occur in the following releases:
   SPARC Platform
     * Solaris 9 without patch 114344-38
     * Solaris 10 without patch 138888-03
     * OpenSolaris based upon builds snv_01 though snv_85

   x86 Platform
     * Solaris 9 without patch 119435-26
     * Solaris 10 without patch 138889-03
     * OpenSolaris based upon builds snv_01 though snv_85

   Note: Solaris 8 is not impacted by this issue.

   3. Symptoms

   If this issue has been exploited, a system panic would occur,
   generating a stack trace similar to the following:
   ipsec_latch_inbound+0x3c(60011e0cf38, 600110e7e48, c8, 26, 0, 0)
   ip_bind_ipsec_policy_set+0x60(60011f6def0, 600199e0d40, 0, 600110e7e48,600161cc
   340, 600151b02c0)
   tcp_get_ipsec_conn+0x2d8(6001634d500, 600110e7e48, 2a10035f218, 600151b02c0, 0,
   600199e0d40)
   tcp_conn_request+0x1fc(40, 0, 60010955f00, 600121bd580, 88300001, 0)
   squeue_enter_chain+0x90(60010955f00, 600199e0d40, 600199e0d40, 2060, 0, af795)
   ip_fanout_proto_again+0x398(600199e0d40, 600110318a8, 600110318a8, 60010bd6a18,
   c8, 60010bd6a28)
   ip_proto_input+0xacc(60010af6f70, 600199e0d40, 600109a84e0, 60010bd6a18,6001103
   18a8, 600109a84f4)
   ip_input+0xb74(600109a84e0, 300003d6040, 0, 600110318a8, 0, 0)
   i_dls_link_rx+0x1f0(60011035e38, 300003d6040, 0, 6001634d500, 2a10035f6c0,2a100
   35f6c8)
   mac_rx+0x8c(60011033e08, 300003d6040, 6001634d500, 0, 6001634d500, 60011033ef8)
   bge_receive+0x564(5a, 60010982000, 8100, ffffffffffffffff, 2f5c, 0)
   bge_intr+0x1ac(100000053, 60010982000, 100000053000000, 60010984de0, 0, 2c00)
   pci_intr_wrapper+0xb8(60010bced30, 60010ade7a0, 0, 0, 60010b91208, 0)
   intr_thread+0x168(0, 1845740, 0, 0, ffffffffffffffff, 300000b3c80)
   idle+0x128(1814000, 0, 30000f50000, ffffffffffffffff, 2, 1813000)
   thread_start+4(0, 0, 0, 0, 0, 0)

   4. Workaround

   There is no direct workaround for this issue. Until patches can be
   applied, sites may wish to disallow incoming IP-in-IP traffic, which
   can be done on the local system using a network traffic filtering tool
   such as ipfilter(5) which is shipped with Solaris 10 and later.
   For example, on Solaris 10 the following ipf(1M) rule could be used:

   block in log quick proto 4 from any to any

   This rule disables IP-in-IP packets coming to the system. This may
   affect the existing configuration if tunnel interfaces are present.
   Note that after adding this rule, IP packet filtering must be enabled
   for this workaround to take affect. Please see the ipf(1M) man page
   for details about adding new rules and enabling IP filtering.

   5. Resolution

   This issue is addressed in the following releases:
   SPARC Platform
     * Solaris 9 with patch 114344-38 or later
     * Solaris 10 with patch 138888-03 or later
     * OpenSolaris based upon builds snv_86 or later

   x86 Platform
     * Solaris 9 with patch 119435-26 or later
     * Solaris 10 with patch 138889-03 or later
     * OpenSolaris based upon builds snv_86 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 2000-2009 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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