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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2008.0082 -- AUSCERT ALERT
                     [Win][UNIX/Linux][Juniper][Cisco]
          DNS cache poisoning vulnerability information allegedly
                           leaked to the public
                               22 July 2008

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        AusCERT Alert Summary
        ---------------------

Product:              DNS
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
                      Juniper
                      Cisco
Impact:               Provide Misleading Information
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-1447

Ref:                  AL-2008.0080

Revision History:     July 22 2008: Public release
                      July 22 2008: Initial Release

OVERVIEW

        Technical information regarding the recent DNS cache poisoning
        vulnerability may have been leaked to the general public [1][2].
        This increases the likelihood of exploit code being made available.


IMPACT

        Vulnerable DNS software may be tricked into supplying incorrect IP
        addresses for requested hostnames, thus allowing an attacker to
        redirect internet traffic to another, possibly malicious, site.


MITIGATION

        DNS client and server software should be upgraded to a non-vulnerable
        version as soon as possible. Information on affected software can be
        found in AusCERT Alert AL-2008.0080 [3].


REFERENCES

        [1] Invisible Denizen Blog
            http://blog.invisibledenizen.org/2008/07/kaminskys-dns-issue-accidentally-leaked.html

        [2] Matasano Security Confirmation
            http://www.matasano.com/log/1105/regarding-the-post-on-chargen-earlier-today/

        [3] AL-2008.0080 - Multiple DNS implementations vulnerable to
                           cache poisoning
            http://www.auscert.org.au/9546


AusCERT has made every effort to ensure that the information contained
in this document is accurate.  However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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