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                                    CERT-Renater

                         Note d'Information No. 2007/VULN470
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DATE                      : 30/11/2007

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Solaris running Solaris RPC.

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Sun(sm) Alert Notification
      * Sun Alert ID: 103083
      * Synopsis: Race Condition in the Solaris Remote Procedure Calls
        (RPC) Module May Result in a System Panic
      * Category: Security
      * Product: Solaris 9 Operating System, Solaris 10 Operating System,
        Solaris 8 Operating System
      * BugIDs: 4728034
      * Avoidance: Patch
      * State: Resolved
      * Date Released: 28-Nov-2007
      * Date Closed: 28-Nov-2007
      * Date Modified:

1. Impact

    A race condition security vulnerability in the Solaris Remote
    Procedure Call (RPC) Module may allow a local 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 8 without patch 116959-20
      * Solaris 9 without patch 113278-18
      * Solaris 10 without patch 127739-01

    x86 Platform:
      * Solaris 8 without patch 116960-20
      * Solaris 9 without patch 119439-11
      * Solaris 10 without patch 127740-01

    Note: This issue only affects systems which have the 'rpcmod' kernel
    module loaded.

    To determine if the the 'rpcmod' kernel module is loaded, the
    following command can be run:
     $ modinfo -c | grep rpcmod || echo "System not impacted."

3. Symptoms

    Should the described issue occur, the system may panic with a NULL
    pointer dereference and with a message similar to the following:
     panic[cpu0]/thread=2a100717d40: 0x3000619cea0: BAD TRAP: type=31
     rp=2a100716c50 addr=8 mmu_fsr=0 occurred in module "rpcmod" due to
     a NULL pointer dereference.

4. Relief/Workaround

    For some situations it may be possible to avoid loading rpcmod by not
    running RPC services on the system; however, this will remove RPC
    functionality. If this is not acceptable, please see the Resolution
    section below.

5. Resolution

    This issue is addressed in the following releases:

    SPARC Platform:
      * Solaris 8 with patch 116959-20 or later
      * Solaris 9 with patch 113278-18 or later
      * Solaris 10 with patch 127739-01 or later

    x86 Platform:
      * Solaris 8 with patch 116960-20 or later
      * Solaris 9 with patch 119439-11 or later
      * Solaris 10 with patch 127740-01 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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