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                         AUSCERT Security Bulletin

                               ASB-2011.0013
      Denial of Service vulnerability in the Java Runtime Environment
                             10 February 2011

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

Product:              JDK and JRE 6 Update 23 and earlier for Windows, Solaris, and Linux
                      JDK 5.0 Update 27 and earlier for Solaris 9
                      SDK 1.4.2_29 and earlier for Solaris 8
                      JDK and JRE 6 Update 23 and earlier for Windows, Solaris and Linux
                      JDK and JRE 5.0 Update 27 and earlier for Windows, Solaris and Linux
                      SDK and JRE 1.4.2_29 and earlier for Windows, Solaris and Linux
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Denial of Service -- Remote/Unauthenticated
Resolution:           Patch/Upgrade
CVE Names:            CVE-2010-4476  
Member content until: Saturday, March 12 2011

OVERVIEW

        Oracle has announced details of a Denial of Service vulnerability in
        the Java Runtime Environment (JRE).


IMPACT

        Oracle has provided the following description of the vulnerability:
        
        "This Security Alert addresses security issue CVE-2010-4476 (Java
        Runtime Environment hangs when converting "2.2250738585072012e-308" to
        a binary floating-point number), which is a vulnerability in the Java
        Runtime Environment component of the Oracle Java SE and Java for
        Business products. This vulnerability allows unauthenticated network
        attacks ( i.e. it may be exploited over a network without the need for
        a username and password). Successful attack of this vulnerability can
        result in unauthorized ability to cause a hang or frequently repeatable
        crash (complete Denial of Service) of the Java Runtime Environment.
        Java based application and web servers are especially at risk from
        this vulnerability." [1]


MITIGATION

        Oracle advises those using affected versions of Java upgrade to
        appropriate newer versions outlined in their document. [1]
        
        It is expected that other vendors who package Java will update their
        packages shortly to resolve this vulnerability.


REFERENCES

        [1] Oracle Security Alert for CVE-2010-4476
            http://www.oracle.com/technetwork/topics/security/alert-cve-2010-4476-305811.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.

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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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