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CVE-2020-0909

Microsoft Windows 10 Version 1507, Windows 10 Version 1607, Windows 10 Version 1709

A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets. To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.

CVSS
7.5
EPSS
4.58%
91.0% percentile
CISA KEV
Not listed
Published
2020.05.22
PRIORITY ASSESSMENT

Review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability4.58%
Technical severityCVSS 7.5

Vulnerability overview

A denial of service vulnerability exists when Hyper-V on a Windows Server fails to properly handle specially crafted network packets. To exploit the vulnerability, an attacker would send specially crafted network packets to the Hyper-V Server. The security update addresses the vulnerability by resolving the conditions where Hyper-V would fail to properly handle these network packets.

Affected product and versions

Product
Microsoft Windows 10 Version 1507, Windows 10 Version 1607, Windows 10 Version 1709
Affected versions
>= 10.0.10240.0 < publication, >= 10.0.14393.0 < publication, >= 10.0.0 < publication, >= 10.0.17763.0 < publication, >= 6.1.0 < publication, >= 6.3.0 < publication, >= 6.1.7601.0 < publication, >= 6.0.6003.0 < publication, >= 6.2.9200.0 < publication, >= 6.3.9600.0 < publication, 1607, 1709, 1803, 1809, 1903, 1909, r2
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Microsoft Windows 10 Version 1507, Windows 10 Version 1607, Windows 10 Version 1709 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
Not available