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                         AUSCERT Security Bulletin

                               ASB-2011.0068
     A number of vulnerabilities have been identified in Google Chrome
                              25 August 2011

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

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

Product:              Google Chrome
Operating System:     Windows
                      Linux variants
                      Mac OS X
Impact/Access:        Execute Arbitrary Code/Commands -- Remote with User Interaction
                      Denial of Service               -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2011-2839 CVE-2011-2829 CVE-2011-2828
                      CVE-2011-2827 CVE-2011-2826 CVE-2011-2825
                      CVE-2011-2824 CVE-2011-2823 CVE-2011-2822
                      CVE-2011-2821 CVE-2011-2806 
Member content until: Saturday, September 24 2011

OVERVIEW

        A number of vulnerabilities have been identified in Google Chrome
        prior to version 13.0.782.215. [1]


IMPACT

        The vendor has provided the following details regarding these
        vulnerabilities:
        
        "* [$1000] [Windows only] [72492] Medium CVE-2011-2822: URL parsing 
           confusion on the command line. Credit to Vladimir Vorontsov, ONsec 
           company.
         * [82552] High CVE-2011-2823: Use-after-free in line box handling. 
           Credit to Google Chrome Security Team (SkyLined) and independent 
           later discovery by miaubiz.
         * [$1000] [88216] High CVE-2011-2824: Use-after-free with counter 
           nodes. Credit to miaubiz.
         * [88670] High CVE-2011-2825: Use-after-free with custom fonts. Credit 
           to wushi of team509 reported through ZDI (ZDI-CAN-1283), plus 
           indepdendent later discovery by miaubiz.
         * [$1000] [89402] High CVE-2011-2821: Double free in libxml XPath 
           handling. Credit to Yang Dingning from NCNIPC, Graduate University 
           of Chinese Academy of Sciences.
         * [$1000] [87453] High CVE-2011-2826: Cross-origin violation with 
           empty origins. Credit to Sergey Glazunov.
         * [$1337] [Windows only] [89836] Critical CVE-2011-2806: Memory 
           corruption in vertex handing. Credit to Michael Braithwaite of 
           Turbulenz Limited.
         * [$1000] [90668] High CVE-2011-2827: Use-after-free in text 
           searching. Credit to miaubiz.
         * [91517] High CVE-2011-2828: Out-of-bounds write in v8. Credit to 
           Google Chrome Security Team (SkyLined).
         * [$1500] [32-bit only] [91598] High CVE-2011-2829: Integer overflow 
           in uniform arrays. Credit to Sergey Glazunov.
         * [$1000] [Linux only] [91665] High CVE-2011-2839: Buggy memset() in 
           PDF. Credit to Aki Helin of OUSPG." [1]


MITIGATION

        The vendor recommends upgrading to the latest version of Google Chrome
        to correct these issues. [1]


REFERENCES

        [1] Stable Channel Update
            http://googlechromereleases.blogspot.com/2011/08/stable-channel-update_22.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.

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