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             AUSCERT External Security Bulletin Redistribution

                        ESB-2008.0209 -- [Solaris]
          Security Vulnerability May Allow Firewall Compromise or
               Creation of Denial of Service (DoS) Condition
                               4 March 2008


        AusCERT Security Bulletin Summary

Product:              Solaris Internet Protocol
Publisher:            Sun Microsystems
Operating System:     Solaris 10
                      Solaris 9
                      Solaris 8
Impact:               Denial of Service
                      Reduced Security
Access:               Existing Account
CVE Names:            CVE-2008-1095

Revision History:  March 4 2008: Added CVE
                   February 26 2008: Initial Release

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Solution Type Sun Alert

Solution  200183 : Security Vulnerability May Allow Firewall
Compromise or Creation of Denial of Service (DoS) Condition
Bug ID: 6240205
Product: Solaris 9 Operating System
         Solaris 10 Operating System
         Solaris 8 Operating System
Date of Resolved Release: 08-Feb-2008

SA Document Body
Security Vulnerability May Allow Firewall Compromise or Creation
of Denial of Service (DoS) Condition

1. Impact

   A security vulnerability in Solaris Internet Protocol (IP - see
   ip(7P)) implementation may allow a remote privileged user to
   send certain packets bypassing the security policies set by a
   firewall or to cause the system to panic, creating a Denial of
   Service (DoS) condition.

   Sun acknowledges, with thanks, Mark Dowd from IBM Internet
   Security Systems X-Force (http://xforce.iss.net) for bringing
   this issue to our attention.

2. Contributing Factors

   This issue can occur in the following releases:

   SPARC Platform

      * Solaris 8 without patch 116965-30
      * Solaris 9 without patch 114344-32
      * Solaris 10 without patch 118822-27

   x86 Platform

      * Solaris 8 without patch 116966-29
      * Solaris 9 without patch 119435-20
      * Solaris 10 without patch 118844-28

3. Symptoms

   There are no predictable symptoms that would indicate the policies
   of a firewall have been circumvented. If the system panics due
   to this issue, the following stack trace may be seen:


4. Workaround

   To work around the described issues:

   As "root," set the ndd(1M) variable "ip_reass_queue_bytes" to 0
   by using the following command:

      # ndd -set /dev/ip ip_reass_queue_bytes 0

   This workaround will stop the system from re-assembling IP
   fragments. Networks which send/receive fragmented IP packets
   to/from the system will become unreachable.

   Note: This workaround is not persistent across reboot.

5. Resolution

   This issue is addressed in the following releases:

   SPARC Platform

      * Solaris 8 with patch 116965-30 or later
      * Solaris 9 with patch 114344-32 or later
      * Solaris 10 with patch 118822-27 or later

   x86 Platform

      * Solaris 8 with patch 116966-29 or later
      * Solaris 9 with patch 119435-20 or later
      * Solaris 10 with patch 118844-28 or later

   For more information on Security Sun Alerts, see Sun Infodoc

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