Intel has released some BIOS updates after Domas’ recent vulnerability:
Title: Local APIC Elevation of Privilege
Intel ID: INTEL-SA-00045
Impact of vulnerability: Elevation of Privilege
Severity rating: Important
Original release: Aug 04, 2015
Intel is releasing mitigations for a privilege escalation issue. This issue affects certain Intel processors based on older Intel micro-architectures. The issue identified is a method that enables malicious code to gain access to SMM. An issue was disclosed to Intel which leverages architectural differences in processors prior to 2nd Generation Intel Core Processors to gain access to SMM. Administrator or root level privileges are required to execute the attack.
Affected products: Intel Server Board S5500BC, Intel Server Board S5500HCV, Intel Server Board S5500HV, Intel Server Board S5500WB, Intel Server Board S5520HC, Intel Server Board S5520HCT, Intel Server Board S5520UR, Intel Workstation Board S5520SC
Intel highly recommends applying the mitigations.
Intel would like to acknowledge Christopher Domas of Battelle for working with us on this coordinated disclosure.
https://security-center.intel.com/advisory.aspx?intelid=INTEL-SA-00045&languageid=en-fr
Firmware Security 