Auth bypass in Microsoft Windows 10
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.046 (91.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 91.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.046 · newest: 0.046 · change: 0.000
Affected products
- Microsoft Windows 10 — versions 1511, 1607, 1703
- Microsoft Windows 7
- Microsoft Windows 8.1
- Microsoft Windows Rt 8.1
- Microsoft Windows Server 2008 — versions r2
- Microsoft Windows Server 2012 — versions r2
- Microsoft Windows Server 2016
- Microsoft Corporation Windows 7 Sp1, Server 2008 Sp2 And R2 8.1 Rt 8.1, 2012 R2, 10 Gold, 1511, 1607, 1703, 2016. — versions Microsoft Windows
Weakness classification (CWE)
References
- www.orpheus-lyre.info/ (Third Party Advisory)
- portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2017-8495 (Patch, Vendor Advisory)
- www.securityfocus.com/bid/99424 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securitytracker.com/id/1038862 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-8495?
- CVE-2017-8495 is a high-severity vulnerability in Microsoft Windows 10, classified under Improper Authentication. CVSS score: 7.5/10. Published 2017-07-11.
- How severe is CVE-2017-8495?
- High severity. CVSS v3 base score is 7.5 out of 10.