Operating System:

Published:

25 June 2003

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                ESB-2003.0440 -- Sun(sm) Alert Notification
    (Sun Alert ID: 55440) - syslogd(1M) Does Not Properly Handle Large
                            syslog(3C) Packets
                               25 June 2003

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

Product:                syslogd
Publisher:              Sun Microsystems
Operating System:       Solaris
Platform:               SPARC
                        i386
Impact:                 Denial of Service
Access Required:        Remote

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DOCUMENT ID: 55440
SYNOPSIS: syslogd(1M) Does Not Properly Handle Large syslog(3C)
Packets and May Allow an Unprivileged User to Cause a Denial of Service
DETAIL DESCRIPTION:


    Sun(sm) Alert Notification

    * Sun Alert ID: 55440
    

      *Synopsis: syslogd(1M) Does Not Properly Handle Large syslog(3C)
      Packets and May Allow an Unprivileged User to Cause a Denial of
      Service
    

      *Category: Security
    

      *Product: Solaris
    * BugIDs: 4812764
    * Avoidance: Patch
    

      *State: Resolved
    * Date Released: 23-Jun-2003
    * Date Closed: 23-Jun-2003
    * Date Modified:


    1. Impact

A local or remote unprivileged user may be able to terminate the
syslogd(1M) daemon on a Solaris system by sending large sized syslog(3C)
packets. As a result, system messages are no longer forwarded to log
files or users as configured in the syslog.conf(4) file, which is a type
of Denial of Service (DoS).

This issue is described in:

http://www.securityfocus.com/archive/1/324015/2003-06-05/2003-06-11/0

Sun acknowledges with thanks, David Thiel, for bringing this issue to
our attention.


    2. Contributing Factors

This issue can occur in the following releases:

SPARC Platform

    * Solaris 2.6 without patch 106439-13
    * Solaris 7 without patch 106541-25
    * Solaris 8 without patch 110945-08
    * Solaris 9 without patch 112998-03

x86 Platform

    * Solaris 2.6 without patch 106440-14
    * Solaris 7 without patch 106542-25
    * Solaris 8 without patch 110946-08
    * Solaris 9 without patch 114932-01


    3. Symptoms

If the syslogd(1M) daemon is no longer running, the system may have
encountered the described issue. The following command can be executed
to check if the "/usr/bin/syslog" process and the syslogd(1M) daemon are
running on the system:

    $ */usr/bin/ps -ef | grep syslogd
      root   336     1  0   Jun 12 ?        0:03 */usr/sbin/syslogd*            

The output as shown above indicates that the syslogd(1M) daemon is running.


SOLUTION SUMMARY:


    4. Relief/Workaround

There is no workaround. Please see the "Resolution" section below.


    5. Resolution

This issue is addressed in the following releases:

SPARC Platform

    * Solaris 2.6 with patch 106439-13 or later
    * Solaris 7 with patch 106541-25 or later
    * Solaris 8 with patch 110945-08 or later
    * Solaris 9 with patch 112998-03 or later

x86 Platform

    * Solaris 2.6 with patch 106440-14 or later
    * Solaris 7 with patch 106542-25 or later
    * Solaris 8 with patch 110946-08 or later
    * Solaris 9 with patch 114932-01 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 2000-2003 Sun Microsystems, Inc., 4150 Network Circle, Santa
Clara, CA 95054 U.S.A. All rights reserved./

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