CVE-2020-0951 (GCVE-0-2020-0951)

Vulnerability from cvelistv5 – Published: 2020-09-11 17:08 – Updated: 2024-08-04 06:18
VLAI
Title
Windows Defender Application Control Security Feature Bypass Vulnerability
Summary
<p>A security feature bypass vulnerability exists in Windows Defender Application Control (WDAC) which could allow an attacker to bypass WDAC enforcement. An attacker who successfully exploited this vulnerability could execute PowerShell commands that would be blocked by WDAC.</p> <p>To exploit the vulnerability, an attacker need administrator access on a local machine where PowerShell is running. The attacker could then connect to a PowerShell session and send commands to execute arbitrary code.</p> <p>The update addresses the vulnerability by correcting how PowerShell commands are validated when WDAC protection is enabled.</p>
Severity
6.7 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CWE
  • Security Feature Bypass
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows 10 Version 1803 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_1803:*:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_1803:*:*:*:*:*:*:arm64:*
 Create a notification for this product.
Microsoft Windows 10 Version 1809 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:arm64:*
 Create a notification for this product.
Microsoft Windows Server 2019 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1909 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1909:*:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server, version 1909 (Server Core installation) Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_1909:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1709 for 32-bit Systems Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1709 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10:1709:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1903 for 32-bit Systems Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1903 for x64-based Systems Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1903 for ARM64-based Systems Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server, version 1903 (Server Core installation) Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_1903:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 2004 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server version 2004 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_2004:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows 10 Version 1607 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
    cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.0 , < publication (custom)
    cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft PowerShell 7.0 Affected: 7.0.0 , < 7.0.8 (custom)
    cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft PowerShell 7.1 Affected: 7.1.0 , < 7.1.5 (custom)
    cpe:2.3:a:microsoft:powershell_core:*:*:*:*:*:*:*:*
 Create a notification for this product.
Date Public
2020-09-08 07:00
Show details on NVD website
To clipboard 

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      "id": "CVE-2020-0951",
      "lastModified": "2024-11-21T04:54:31.610",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"secure@microsoft.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 6.7, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"HIGH\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 0.8, \"impactScore\": 5.9}, {\"source\": \"nvd@nist.gov\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H\", \"baseScore\": 6.7, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"LOCAL\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"HIGH\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"HIGH\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 0.8, \"impactScore\": 5.9}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:L/AC:L/Au:N/C:C/I:C/A:C\", \"baseScore\": 7.2, \"accessVector\": \"LOCAL\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"COMPLETE\", \"integrityImpact\": \"COMPLETE\", \"availabilityImpact\": \"COMPLETE\"}, \"baseSeverity\": \"HIGH\", \"exploitabilityScore\": 3.9, \"impactScore\": 10.0, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2020-09-11T17:15:15.043",
      "references": "[{\"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951\", \"source\": \"secure@microsoft.com\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}, {\"url\": \"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Patch\", \"Vendor Advisory\"]}]",
      "sourceIdentifier": "secure@microsoft.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"NVD-CWE-noinfo\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-0951\",\"sourceIdentifier\":\"secure@microsoft.com\",\"published\":\"2020-09-11T17:15:15.043\",\"lastModified\":\"2026-02-23T17:19:02.010\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"\u003cp\u003eA security feature bypass vulnerability exists in Windows Defender Application Control (WDAC) which could allow an attacker to bypass WDAC enforcement. An attacker who successfully exploited this vulnerability could execute PowerShell commands that would be blocked by WDAC.\u003c/p\u003e\\n\u003cp\u003eTo exploit the vulnerability, an attacker need administrator access on a local machine where PowerShell is running. The attacker could then connect to a PowerShell session and send commands to execute arbitrary code.\u003c/p\u003e\\n\u003cp\u003eThe update addresses the vulnerability by correcting how PowerShell commands are validated when WDAC protection is enabled.\u003c/p\u003e\"},{\"lang\":\"es\",\"value\":\"Se presenta una vulnerabilidad de omisi\u00f3n de funciones de seguridad en  Windows Defender Application Control (WDAC) que podr\u00eda permitir a un atacante omitir la aplicaci\u00f3n de WDAC, tambi\u00e9n se conoce como \\\"Windows Defender Application Control Security Feature Bypass 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Advisory\"]},{\"url\":\"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0951\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Vendor Advisory\"]}]}}"
  }
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.