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                         AUSCERT Security Bulletin

                               ASB-2010.0062
        A vulnerability has been identified in ActivePerl prior to
                             5.10.1 build 1007
                             25 February 2010

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

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

Product:              ActivePerl
Operating System:     Windows
                      UNIX variants (UNIX, Linux, OSX)
Impact/Access:        Denial of Service -- Remote with User Interaction
Resolution:           Patch/Upgrade
Member content until: Saturday, March 27 2010

OVERVIEW

        A vulnerability has been identified in ActivePerl prior to 5.10.1 
        build 1007.


IMPACT

        The vendor has described the vulnerability as:
        
        "A user can create a specially crafted UTF-8 code that, when processed
        by the regular expression parser, will cause the parser to crash." [1]


MITIGATION

        The vendor has released a new version of ActivePerl to correct this
        vulnerability. [1]


REFERENCES

        [1] ActiveState announces ActivePerl 5.10.1 build 1007 and ActivePerl
            5.8.9 build 827
            http://aspn.activestate.com/ASPN/Mail/Message/activeperl/3815369

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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