TI-2017-06033 Aliases CVE-2017-8495 GHSA-95f7-rc94-rqj7

Improper authentication in Microsoft Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1…

MEDIUM 40CWE-287Published 2017-07-11 · Updated 2024-09-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

EPSS 0.04621 91st percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	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.	Microsoft Windows	—	No fix listed	CNA

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. VendorMicrosoft Affected Microsoft Windows Fixed in — No fix listed CNA

CPE configurations NVD · 12

CPE	Versions	Role	Vendor
cpe:2.3:o:microsoft:windows_10:-:::::::*	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:1511:::::::*	1511	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:1607:::::::*	1607	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_10:1703:::::::*	1703	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_7::sp1::::::*	all versions	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_8.1::::::::	all versions	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_rt_8.1::::::::	all versions	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server_2008::sp2::::::*	all versions	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1::::::	r2 sp1	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server_2012::::::::	all versions	Vulnerable	Microsoft

cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:* Versions 1511 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:* Versions 1607 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_10:1703:*:*:*:*:*:*:* Versions 1703 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_rt_8.1:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server_2008:*:sp2:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:* Versions r2 sp1 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft

Show 2 more CPE

CPE	Versions	Role	Vendor
cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*	r2	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server_2016::::::::	all versions	Vulnerable	Microsoft

cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2017-8495
2026-10-03 Alias added: GHSA-95f7-rc94-rqj7

References

Patch 1

https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495

Advisory 1

https://www.orpheus-lyre.info/

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Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences