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                         AUSCERT Security Bulletin

                               ASB-2009.1056
               Multiple vulnerabilities in FreeBSD packages
                              19 August 2009

===========================================================================

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

Product:              memcached
                      gnutls
Operating System:     FreeBSD
Impact/Access:        Execute Arbitrary Code/Commands -- Remote/Unauthenticated
                      Denial of Service               -- Remote/Unauthenticated
                      Access Privileged Data          -- Remote/Unauthenticated
                      Provide Misleading Information  -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-2730 CVE-2009-1417 CVE-2009-1416
                      CVE-2009-1415 CVE-2009-1255 
Member content until: Friday, September 18 2009
Reference:            ASB-2009.1048
                      ESB-2009.0460

OVERVIEW

        FreeBSD has updated two ports which correct security vulnerabilities
        in memcached and GnuTLS.


IMPACT

        CVE-2009-1255 "A weakness has been reported in memcached, which can
        be exploited by malicious people to disclose system information." 
        [1]
        
        CVE-2009-2730 "By using a NUL byte in CN/SAN fields, it was possible
        to fool GnuTLS into 1) not printing the entire CN/SAN field value 
        when printing a certificate and 2) cause incorrect positive matches
        when matching a hostname against a certificate." [2]
        
        CVE-2009-1415, CVE-2009-1416, CVE-2009-1417 "GnuTLS is prone to 
        multiple remote vulnerabilities:
        
            * A remote code-execution vulnerability. * A denial-of-service 
        vulnerability. * A signature-generation vulnerability. * A 
        signature-verification vulnerability.
        
        An attacker can exploit these issues to potentially execute 
        arbitrary code, trigger denial-of-service conditions, carry out 
        attacks against data signed with weak signatures, and cause clients
        to accept expired or invalid certificates from servers." [3]


MITIGATION

        It is recommended to update the packages as soon as possible.


REFERENCES

        [1] VuXML: memcached -- memcached stats maps Information Disclosure
            Weakness
            http://www.vuxml.org/freebsd/86ada694-8b30-11de-b9d0-000c6e274733.html

        [2] VuXML: GnuTLS -- improper SSL certificate verification
            http://www.vuxml.org/freebsd/856a6f84-8b30-11de-8062-00e0815b8da8.html

        [3] VuXML: GnuTLS -- multiple vulnerabilities
            http://www.vuxml.org/freebsd/b31a1088-460f-11de-a11a-0022156e8794.html

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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