CVE-2020-17049 (GCVE-0-2020-17049)

Vulnerability from cvelistv5 – Published: 2020-11-11 00:00 – Updated: 2024-11-15 16:12
VLAI
Title
Kerberos KDC Security Feature Bypass Vulnerability
Summary
A security feature bypass vulnerability exists in the way Key Distribution Center (KDC) determines if a service ticket can be used for delegation via Kerberos Constrained Delegation (KCD). To exploit the vulnerability, a compromised service that is configured to use KCD could tamper with a service ticket that is not valid for delegation to force the KDC to accept it. The update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.
Severity
6.6 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • Security Feature Bypass
Assigner
References
Impacted products
Vendor Product Version
Microsoft Windows Server 2019 Affected: 10.0.0 , < 10.0.17763.2061 (custom)
    cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2061:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2019 (Server Core installation) Affected: 10.0.0 , < 10.0.17763.2061 (custom)
    cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.2061:*:*:*:*:*:*:*
 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 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 Server version 2004 Affected: 10.0.0 , < 10.0.19041.1110 (custom)
    cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1110:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2016 Affected: 10.0.0 , < 10.0.14393.4530 (custom)
    cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4530:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2016 (Server Core installation) Affected: 10.0.0 , < 10.0.14393.4530 (custom)
    cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4530:*:*:*:*:*:*:*
 Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.0 , < 6.0.6003.21167 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21167:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) Affected: 6.0.0 , < 6.0.6003.21167 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21167:*:*:*:*:*:x64:*
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21167:*:*:*:*:*:x86:*
 Create a notification for this product.
Microsoft Windows Server 2008 Service Pack 2 Affected: 6.0.0 , < 6.0.6003.21167 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21167:*:*:*:*:*:x86:*
 Create a notification for this product.
Microsoft Windows Server 2008 R2 Service Pack 1 Affected: 6.1.0 , < 6.1.7601.25661 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25661:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) Affected: 6.0.0 , < 6.1.7601.25661 (custom)
    cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25661:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 Affected: 6.2.0 , < 6.2.9200.23409 (custom)
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23409:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 (Server Core installation) Affected: 6.2.0 , < 6.2.9200.23409 (custom)
    cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23409:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 R2 Affected: 6.3.0 , < 6.3.9600.20069 (custom)
    cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20069:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server 2012 R2 (Server Core installation) Affected: 6.3.0 , < 6.3.9600.20069 (custom)
    cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20069:*:*:*:*:*:x64:*
 Create a notification for this product.
Microsoft Windows Server version 20H2 Affected: 10.0.0 , < 10.0.19041.1110 (custom)
    cpe:2.3:o:microsoft:windows_server_20H2:10.0.19041.1110:*:*:*:*:*:*:*
 Create a notification for this product.
Date Public
2020-11-10 08:00
Show details on NVD website
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      "id": "CVE-2020-17049",
      "lastModified": "2024-11-21T05:07:42.727",
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      "published": "2020-11-11T07:15:16.543",
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      "sourceIdentifier": "secure@microsoft.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-863\"}]}]"
    },
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    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2020-17049\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-15T16:12:52.309Z\", \"dateReserved\": \"2020-08-04T00:00:00.000Z\", \"assignerOrgId\": \"f38d906d-7342-40ea-92c1-6c4a2c6478c8\", \"datePublished\": \"2020-11-11T00:00:00.000Z\", \"assignerShortName\": \"microsoft\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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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.