CVE-2017-8495

high

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.

References

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/

Details

Source: MITRE

Published: 2017-07-11

Updated: 2017-07-17

Type: CWE-287

Risk Information

CVSS v2

Base Score: 6

Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 6.8

Severity: MEDIUM

CVSS v3

Base Score: 7.5

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

Impact Score: 5.9

Exploitability Score: 1.6

Severity: HIGH