CVE-2009-4419 Information

Description

Intel Q35 GM45 PM45 Express Q45 and Q43 Express chipsets in the SINIT Authenticated Code Module (ACM) which allows local users to bypass the Trusted Execution Technology protection mechanism and gain privileges by modifying the MCHBAR register to point to an attacker-controlled region which prevents the SENTER instruction from properly applying VT-d protection while an MLE is being loaded.

Reference

http://invisiblethingslab.com/resources/misc09/Another20TXT20Attack.pdf http://osvdb.org/61248 http://secunia.com/advisories/37900 http://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00021&languageid=en-fr http://theinvisiblethings.blogspot.com/2009/12/another-txt-attack.html http://www.securityfocus.com/bid/37430 http://www.securitytracker.com/id?1023382 http://www.vupen.com/english/advisories/2009/3618 https://exchange.xforce.ibmcloud.com/vulnerabilities/54963