Operating System:

[Solaris]

Published:

11 November 2008

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                        ESB-2008.1034 -- [Solaris]
Security Vulnerabilities in DHCP Handling of DHCP Requests May Allow Remote
   Users to Execute Arbitrary Code or Cause a Denial of the DHCP Service
                             11 November 2008

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

Product:              dhcpd
Publisher:            Sun Microsystems
Operating System:     Solaris
Impact:               Execute Arbitrary Code/Commands
                      Denial of Service
Access:               Remote/Unauthenticated
CVE Names:            CVE-2007-5365

Ref:                  ESB-2007.0767
                      ESB-2007.0811
                      ESB-2007.0832

Original Bulletin:  
  http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-66-243806-1

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   Solution Type: Sun Alert
   Solution  243806 :   Security Vulnerabilities in DHCP Handling of DHCP
   Requests May Allow Remote Users to Execute Arbitrary Code or Cause a
   Denial of the DHCP Service          
   Bug ID: 6619398, 6713805

   Product
   Solaris 8 Operating System
   Solaris 9 Operating System
   Solaris 10 Operating System
   OpenSolaris

   Date of Resolved Release: 07-Nov-2008

   SA Document Body
   Security Vulnerabilities in DHCP Handling of DHCP Requests May Allow
   Remote Users to Execute Arbitrary Code or Cause a Denial of the DHCP
   Service

   1. Impact
   Security vulnerabilities in the DHCP (in.dhcpd(1M)) server handling of
   DHCP requests may allow a remote unprivileged user to kill the DHCP
   server daemon (Denial of Service) or to execute arbitrary code as the
   root user.
   One of the issues described here is also referenced in the following
   document:
   CVE-2007-5365 at
   http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5365

   2. Contributing Factors
   These issues can occur in the following releases:
   SPARC Platform
     * Solaris 8 without patch 109077-21
     * Solaris 9 without patch 112837-16
     * Solaris 10 without patch 138876-01
     * OpenSolaris based upon builds snv_01 through snv_102

   x86 Platform
     * Solaris 8 without patch 109078-21
     * Solaris 9 without patch 114265-15
     * Solaris 10 without patch 138877-01
     * OpenSolaris based upon builds snv_01 through snv_102

   Notes:
   1. Only OpenSolaris installations which include the affected binary
   /usr/lib/inet/in.dhcpd and have the DHCP server configured and running
   are impacted by this issue.
   2. OpenSolaris distributions may include additional bug fixes above
   and beyond the build from which it was derived. The base build can be
   derived as follows:
   $ uname -v
   snv_86

   3. Only systems which are configured as a DHCP server are impacted by
   this issue. To determine if a system is configured as a DHCP server,
   the following command can be run.
   $ svcs svc:/network/dhcp-server:default
   STATE         STIME    FMRI
   online        Sep_09   svc:/network/dhcp-server:default

   If the output shows the state is online, then the system is configured
   as a DHCP server.

   3. Symptoms
   The security vulnerability which allows arbitrary code executio, has
   no reliable symptoms that would indicate the issue has been exploited.
   The security vulnerability which allows a denial of of teh DHCP
   service will result in the DHCP server daemon exiting with an
   "Assertion failed" error message.

   4. Workaround
   There are no workarounds for these issues. Please see the Resolution
   section below.

   5. Resolution

   These issues are addressed in the following releases:
   SPARC Platform
     * Solaris 8 with patch 109077-21 or later
     * Solaris 9 with patch 112837-16 or later
     * Solaris 10 with patch 138876-01 or later
     * OpenSolaris based upon builds snv_103 or later

   x86 Platform
     * Solaris 8 with patch 109078-21 or later
     * Solaris 9 with patch 114265-15 or later
     * Solaris 10 with patch 138877-01 or later
     * OpenSolaris based upon builds snv_103 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 2000-2008 Sun Microsystems, Inc., 4150 Network Circle, Santa
   Clara, CA 95054 U.S.A. All rights reserved

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