Quantum Secular Labs / Blog / Advisories
CVE-2017-0021: Microsoft Windows 10: Code execution
CVE-2017-0021 is rated critical with a CVSS v3.0 base score of 9.0 and affects Microsoft Windows 10. Per its scoring, it can be exploited without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.
Vulnerability description
Hyper-V in Microsoft Windows 10 1607 and Windows Server 2016 does not properly validate vSMB packet data, which allows attackers to execute arbitrary code on a target OS, aka "Hyper-V System Data Structure Vulnerability." This vulnerability is different from that described in CVE-2017-0095.
Severity breakdown
CVSS v3.0 9.0: CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Attack vector: Adjacent. The attacker must be on the same shared network segment.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: Low. A basic user account is enough.
- User interaction: None. No action from any user is needed.
- Scope: Changed. Impact reaches beyond the vulnerable component to other resources.
- Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: High. Total loss of availability; the component can be shut down.
Affected products
- Microsoft Windows 10: 1607
- Microsoft Windows Server 2016: all versions listed by NVD