CVE-2017-8495 Information

Description

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 and 1703 and Windows Server 2016 allows an attacker to bypass Extended Protection for Authentication when Kerberos fails to prevent tampering with the SNAME field during ticket exchange aka \Kerberos SNAME Security Feature Bypass Vulnerability\ or Orpheus’ Lyre.

CVSS Vector

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

Reference

http://www.securityfocus.com/bid/99424 http://www.securitytracker.com/id/1038862 https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495 https://www.orpheus-lyre.info/

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.5