Escalation of Privilege Advisory

There is an escalation of privilege vulnerability in Intel® Active Management Technology (AMT), Intel® Standard Manageability (ISM), and Intel® Small Business Technology versions firmware versions 6.x, 7.x, 8.x 9.x, 10.x, 11.0, 11.5, and 11.6 that can allow an unprivileged attacker to gain control of the manageability features provided by these products.  This vulnerability does not exist on Intel-based consumer PCs. 

There are two ways this vulnerability may be accessed please note that Intel® Small Business Technology is not vulnerable to the first issue.

• An unprivileged network attacker could gain system privileges to provisioned Intel manageability SKUs: Intel® Active Management Technology (AMT) and Intel® Standard Manageability (ISM).
  • CVSSv3 9.8 Critical /AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
• An unprivileged local attacker could provision manageability features gaining unprivileged network or local system privileges on Intel manageability SKUs: Intel® Active Management Technology (AMT), Intel® Standard Manageability (ISM), and Intel® Small Business Technology (SBT).
  • CVSSv3 8.4 High /AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The issue has been observed in Intel manageability firmware versions 6.x, 7.x, 8.x 9.x, 10.x, 11.0, 11.5, and 11.6 for Intel® Active Management Technology, Intel® Small Business Technology, and Intel® Standard Manageability.  Versions before 6 or after 11.6 are not impacted.

Step 1: Determine if you have an Intel® AMT, Intel® SBA, or Intel® ISM capable system: https://communities.intel.com/docs/DOC-5693.  If you determine that you do not have an Intel® AMT, Intel® SBA, or Intel® ISM capable system then no further action is required.

Step 3: Intel highly recommends checking with your system OEM for updated firmware.  Firmware versions that resolve the issue have a four digit build number that starts with a “3” (X.X.XX.3XXX) Ex: 8.1.71.3608.

Step 4: If a firmware update is not available from your OEM, mitigations for provided in this document: https://downloadcenter.intel.com/download/26754

For assistance in implementing the mitigations steps provided in this document, please contact Intel Customer Support (http://www.intel.com/content/www/us/en/support/contact-support.html#@23); from the Technologies section, select Intel® Active Management Technology (Intel® AMT).

Intel would like to thank Maksim Malyutin from Embedi for reporting this issue and working with us on coordinated disclosure.