CVE-2017-8495
Summary
| CVE | CVE-2017-8495 |
|---|---|
| State | PUBLISHED |
| Assigner | microsoft |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2017-07-11 21:29:00 UTC |
| Updated | 2025-04-20 01:37:25 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.0 7.5 HIGH from [email protected]
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Problem Types: CWE-287 | Security Feature Bypass
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 2.0 | [email protected] | Primary | 6 | AV:N/AC:M/Au:S/C:P/I:P/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
HighCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
MediumAuthentication
SingleConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:N/AC:M/Au:S/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Microsoft | Windows 10 | - | All | All | All |
| Operating System | Microsoft | Windows 10 | 1511 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1607 | All | All | All |
| Operating System | Microsoft | Windows 10 | 1703 | All | All | All |
| Operating System | Microsoft | Windows 7 | All | sp1 | All | All |
| Operating System | Microsoft | Windows 8.1 | All | All | All | All |
| Operating System | Microsoft | Windows Rt 8.1 | All | All | All | All |
| Operating System | Microsoft | Windows Server 2008 | All | sp2 | All | All |
| Operating System | Microsoft | Windows Server 2008 | r2 | sp1 | All | All |
| Operating System | Microsoft | Windows Server 2012 | All | All | All | All |
| Operating System | Microsoft | Windows Server 2012 | r2 | All | All | All |
| Operating System | Microsoft | Windows Server 2016 | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Microsoft Corporation | 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. | affected Microsoft Windows | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| Microsoft Windows Kerberos CVE-2017-8495 Security Bypass Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | Third Party Advisory, VDB Entry |
| {{windowTitle}} | af854a3a-2127-422b-91ae-364da2661108 | portal.msrc.microsoft.com | Patch, Vendor Advisory |
| Windows Kerberos SNAME Field Integrity Validation Flaw Lets Remote Authenticated Users Bypass Extended Protection for Authentication - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | Third Party Advisory, VDB Entry |
| Orpheus' Lyre | af854a3a-2127-422b-91ae-364da2661108 | www.orpheus-lyre.info | Third Party Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.