Intel Management Engine Authentication Bypass (INTEL-SA-00075) (remote check)

Critical Nessus Plugin ID 97999

Synopsis

The remote host is affected by an authentication bypass vulnerability.

Description

The Intel Management Engine on the remote host has Active Management Technology (AMT) enabled, and is affected by an authentication bypass vulnerability. An unauthenticated, remote attacker can exploit this, via a NULL HTTP Digest response, to bypass authentication.

Note that the vulnerability is only exploitable remotely if either Active Management Technology (AMT), Intel Standard Manageability (ISM), or Small Business Technology (SBT) is enabled. However, a local attacker can still exploit the vulnerability even if these components are disabled by simply re-enabling the components.

Solution

Contact your system OEM for updated firmware per the vendor advisory.

Alternatively, apply these mitigations per the INTEL-SA-00075 mitigation guide :

- Unprovision Intel manageability SKU clients.
- Disable or remove the Local Manageability Service (LMS).
- Configure local manageability configuration restrictions.

See Also

http://www.nessus.org/u?9e6ca5f4

https://downloadcenter.intel.com/download/26754

https://mjg59.dreamwidth.org/48429.html

https://www.embedi.com/news/mythbusters-cve-2017-5689

Plugin Details

Severity: Critical

ID: 97999

File Name: intel_amt_auth_bypass.nbin

Version: $Revision:$

Type: remote

Family: Web Servers

Published: 2017/05/04

Modified: 2018/04/18

Dependencies: 10107

Risk Information

Risk Factor: Critical

CVSSv2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSSv3

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/h:intel:active_management_technology, cpe:/o:intel:active_management_technology_firmware

Exploit Available: true

Exploited by Nessus: true

Patch Publication Date: 2017/04/25

Vulnerability Publication Date: 2017/05/01

Reference Information

CVE: CVE-2017-5689

BID: 98269

OSVDB: 156732

CERT: 491375