The latest security information on Intel® products.
EDK II Untested memory not covered by SMM page protection
| Intel ID: |
INTEL-SA-00159 |
|---|---|
| Product family: |
Firmware Based on Tianocore |
| Impact of vulnerability: |
Escalation of Privilege, Information Disclosure |
| Severity rating: |
Important |
| Original release: |
07/10/2018 |
| Last revised: |
07/10/2018 |
Summary:
Intel is releasing firmware updates to improve System Management Mode (SMM) protection.
Description:
Incorrect handling of memory types in Tianocore firmware potentially allows a local attacker to bypass SMM protections on memory.
• High 8.2 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Affected products:
Firmware based on Tianocore
• MdePkg
• UefiCpuPkg
• MdeModulePkg
Recommendations:
Intel recommends that end-users contact their system manufacturers for updated system firmware.
• Patches for Tianocore are listed in the Tianocore Security Bugzilla: https://bugzilla.tianocore.org/show_bug.cgi?id=751
• Intel has released updated firmware to address this issue: https://github.com/otcshare/CCG-CNLCFLGenericFull/commit/b7463d0ec1d57c625094f7ade1831c23cdf8f664
Acknowledgements:
The issue was reported through TianoCore Bugzilla.
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