AusCERT - ASB-2009.1169.2 - UPDATE [Win][UNIX/Linux] Intel Trusted Execution Technology: Increased privileges

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ASB-2009.1169.2 - UPDATE [Win][UNIX/Linux] Intel Trusted Execution Technology: Increased privileges - Remote with user interaction

Date: 29 December 2009
Related Files: ASB-2009.1169

Click here for printable version

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                         AUSCERT Security Bulletin

                              ASB-2009.1169.2
     A vulnerability has been identified in a number of Intel products
                             30 December 2009

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

Product:              Intel Trusted Execution Technology
Operating System:     UNIX variants (UNIX, Linux, OSX)
                      Windows
Impact/Access:        Increased Privileges -- Remote with User Interaction
Resolution:           Patch/Upgrade
CVE Names:            CVE-2009-4419  
Member content until: Friday, January 22 2010

Revision History:     December 30 2009: Added CVE Reference
                      December 23 2009: Initial Release

OVERVIEW

        A vulnerability has been identified in a number of Intel products which
        use Intel Trusted Execution Technology.


IMPACT

        Intel has confirmed that systems using Q35, GM45, PM45 Express, Q45
        and Q43 Express chipsets are affected by this vulnerability and have
        provided the following details:
        
        "A misconfiguration in SINIT code could potentially allow a malicious 
        attacker to circumvent Intel Trusted Execution Technology and elevate 
        their privileges. Intel has released an updated SINIT Authenticated
        Code Module (ACM) to correct this misconfiguration." [1]


MITIGATION

        Intel has provided an updated SINIT Authenticated Core Module which
        mitigates this issue and highly recommends applying this update. [1]


REFERENCES

        [1] SINIT misconfiguration allows for Privilege Escalation
            http://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00021&languageid=en-fr

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)
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                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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