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             AUSCERT External Security Bulletin Redistribution

                        ESB-2007.0071 -- [Solaris]
     A Security Vulnerability in Solaris 10 ICMP Handling May Allow a
             SystemPanic and Result in Denial of Service (DoS)
                              1 February 2007

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

Product:              Solaris 10 ICMP Handling
Publisher:            Sun Microsystems
Operating System:     Solaris 10
Impact:               Denial of Service
Access:               Remote/Unauthenticated

Original Bulletin:
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-102697-1

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Sun(sm) Alert Notification
     * Sun Alert ID: 102697
     * Synopsis: A Security Vulnerability in Solaris 10 ICMP Handling May
       Allow a SystemPanic and Result in Denial of Service (DoS)
     * Category: Security
     * Product: Solaris 10 Operating System
     * BugIDs: 6443912
     * Avoidance: Patch, Workaround
     * State: Resolved
     * Date Released: 30-Jan-2007
     * Date Closed: 30-Jan-2007
     * Date Modified: 

1. Impact

   A security vulnerability in the Solaris 10 ICMP handling process may
   allow a remote unprivileged user to panic the system, resulting in a
   Denial of Service (DoS) condition.

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform
     * Solaris 10 without patch 118833-28

   x86 Platform
     * Solaris 10 without patch 118855-28

   Notes:
    1. Solaris 8 and 9 are not impacted by this issue.
    2. Systems are only impacted by this issue if they are configured to
       receive ICMP ping(1M) requests.

   To determine if a system ("solaris1" in this example) is configured to
   receive ICMP ping requests, the following command can be run:
    $ ping solaris1
    solaris1 is alive

3. Symptoms

   Should the described issue occur, the system may panic with a stack
   trace similar to the following:
    ip:ill_refrele+0x8(0x0, 0x0, 0x0, 0x1010)
    ip:ip_output+0x149c(0x0?, 0x6000864f2c0?, 0x60001bcede0?, , 0x2)
    ip:ip_wput(0x60001bcede0, 0x600053ac140) - frame recycled
    unix:put+0x1c0(0x60001bcede0?, 0x600053ac140)
    ip:icmp_inbound+0xb88(0x60001bcece8, 0x6000864f2c0, 0x0, 0x30000c31268, 0x0
, 0x0, 0x0, 0x1, , 0x2)
    ip:ip_proto_input+0x56c(, 0x6000864f2c0, 0x600086e7500, 0x60003a24ed8, 0x30
000c31268)
    ip:ip_input+0x7d0(0x30000c31268, 0x0, , , 0xffffffff)
    ip:ip_rput(0x60001bcece8, 0x6000864f300) - frame recycled 

4. Relief/Workaround

   To work around the described issue, ICMP packets can be blocked using
   packet filtering software such as ipfilter(5), which is shipped with
   Solaris 10.

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform
     * Solaris 10 with patch 118833-28 or later

   x86 Platform
     * Solaris 10 with patch 118855-28 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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