PT-2017-18414 · Microsoft · Windows Server 2016+9

Published 2017-07-11 · Updated 2019-10-03 · CVE-2017-8563

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Microsoft Windows versions prior to the fixed version

Description The issue allows an elevation of privilege due to Kerberos falling back to NT LAN Manager (NTLM) Authentication Protocol as the default authentication protocol. An elevation-of-privilege vulnerability allows attackers to affect the system.

Recommendations For Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, and Windows Server 2016, update to a version that does not use NTLM as the default authentication protocol to prevent the elevation of privilege vulnerability. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Preservation of Permissions

Weakness Enumeration

CWE-281

Related Identifiers

CVE-2017-8563

Affected Products

Kerberos

Ntlm

Windows

Windows 10

Windows 7

Windows 8.1

Windows Rt 8.1

Windows Server 2008

Windows Server 2012

Windows Server 2016

References · 6

• https://osv.dev/vulnerability/CVE-2017-8563 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2017-8563 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-8563 · Security Note
• https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8563 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8563 · Security Note
• http://securityfocus.com/bid/99402 · Note