CVE-2017-8495

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 v3.0 7.5 HIGH
CVSS v2.0 6.0 MEDIUM

7.5^/10

CVSS v3.0 : HIGH

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

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.0^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 6.8 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495	Patch Vendor Advisory
http://www.securitytracker.com/id/1038862	Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/99424	Third Party Advisory VDB Entry
https://www.orpheus-lyre.info/	Third Party Advisory

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_server_2008::sp2::::::*
	cpe:2.3:o:microsoft:windows_server_2008:r2:sp1::::::
	cpe:2.3:o:microsoft:windows_server_2012::::::::
	cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*
	cpe:2.3:o:microsoft:windows_10:1607:::::::*
	cpe:2.3:o:microsoft:windows_7::sp1::::::*
	cpe:2.3:o:microsoft:windows_rt_8.1::::::::
	cpe:2.3:o:microsoft:windows_server_2016::::::::
	cpe:2.3:o:microsoft:windows_10:-:::::::*
	cpe:2.3:o:microsoft:windows_10:1511:::::::*
	cpe:2.3:o:microsoft:windows_10:1703:::::::*
	cpe:2.3:o:microsoft:windows_8.1::::::::

Information

Published : 2017-07-11 14:29

Updated : 2017-07-17 08:06

NVD link : CVE-2017-8495

Mitre link : CVE-2017-8495

JSON object : View

CWE

CWE-287

Improper Authentication

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Products Affected

microsoft

windows_7
windows_server_2016
windows_rt_8.1
windows_10
windows_8.1
windows_server_2008
windows_server_2012

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