fkie_cve-2020-17049
Vulnerability from fkie_nvd
Published
2020-11-11 07:15
Modified
2024-11-21 05:07
Severity ?
6.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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.
References
secure@microsoft.comhttp://www.openwall.com/lists/oss-security/2021/11/10/3Mailing List, Third Party Advisory
secure@microsoft.comhttps://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049Patch, Vendor Advisory
secure@microsoft.comhttps://security.gentoo.org/glsa/202309-06
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2021/11/10/3Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202309-06
Impacted products
Vendor Product Version
microsoft windows_server_2012 *
microsoft windows_server_2012 r2
microsoft windows_server_2016 -
microsoft windows_server_2016 20h2
microsoft windows_server_2016 1903
microsoft windows_server_2016 1909
microsoft windows_server_2016 2004
microsoft windows_server_2019 -
samba samba *
samba samba *
samba samba *


To clipboard 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:microsoft:windows_server_2012:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "80EB5690-B20F-457A-A202-FBADAA17E05C",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*",
                     matchCriteriaId: "DB18C4CE-5917-401E-ACF7-2747084FD36E",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*",
                     matchCriteriaId: "041FF8BA-0B12-4A1F-B4BF-9C4F33B7C1E7",
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                  },
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                     vulnerable: true,
                  },
                  {
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                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*",
                     matchCriteriaId: "C253A63F-03AB-41CB-A03A-B2674DEA98AA",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*",
                     matchCriteriaId: "0B60D940-80C7-49F0-8F4E-3F99AC15FA82",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*",
                     matchCriteriaId: "DB79EE26-FC32-417D-A49C-A1A63165A968",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "68372C1C-E091-434C-A853-8C61A92BFCDE",
                     versionEndExcluding: "4.13.13",
                     versionStartIncluding: "4.1.0",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "F7D7145C-64C2-40D6-90CD-EA21B84AB559",
                     versionEndExcluding: "4.14.9",
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                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*",
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                     vulnerable: true,
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               negate: false,
               operator: "OR",
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         ],
      },
   ],
   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "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).\nTo 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.\nThe update addresses this vulnerability by changing how the KDC validates service tickets used with KCD.",
      },
      {
         lang: "es",
         value: "Vulnerabilidad de Omisión de la Característica de Seguridad de Kerberos",
      },
   ],
   id: "CVE-2020-17049",
   lastModified: "2024-11-21T05:07:42.727",
   metrics: {
      cvssMetricV2: [
         {
            acInsufInfo: false,
            baseSeverity: "HIGH",
            cvssData: {
               accessComplexity: "LOW",
               accessVector: "NETWORK",
               authentication: "SINGLE",
               availabilityImpact: "COMPLETE",
               baseScore: 9,
               confidentialityImpact: "COMPLETE",
               integrityImpact: "COMPLETE",
               vectorString: "AV:N/AC:L/Au:S/C:C/I:C/A:C",
               version: "2.0",
            },
            exploitabilityScore: 8,
            impactScore: 10,
            obtainAllPrivilege: false,
            obtainOtherPrivilege: false,
            obtainUserPrivilege: false,
            source: "nvd@nist.gov",
            type: "Primary",
            userInteractionRequired: false,
         },
      ],
      cvssMetricV31: [
         {
            cvssData: {
               attackComplexity: "HIGH",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 6.6,
               baseSeverity: "MEDIUM",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "HIGH",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 0.7,
            impactScore: 5.9,
            source: "secure@microsoft.com",
            type: "Secondary",
         },
         {
            cvssData: {
               attackComplexity: "LOW",
               attackVector: "NETWORK",
               availabilityImpact: "HIGH",
               baseScore: 7.2,
               baseSeverity: "HIGH",
               confidentialityImpact: "HIGH",
               integrityImpact: "HIGH",
               privilegesRequired: "HIGH",
               scope: "UNCHANGED",
               userInteraction: "NONE",
               vectorString: "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
               version: "3.1",
            },
            exploitabilityScore: 1.2,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Secondary",
         },
      ],
   },
   published: "2020-11-11T07:15:16.543",
   references: [
      {
         source: "secure@microsoft.com",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/11/10/3",
      },
      {
         source: "secure@microsoft.com",
         tags: [
            "Patch",
            "Vendor Advisory",
         ],
         url: "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049",
      },
      {
         source: "secure@microsoft.com",
         url: "https://security.gentoo.org/glsa/202309-06",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Mailing List",
            "Third Party Advisory",
         ],
         url: "http://www.openwall.com/lists/oss-security/2021/11/10/3",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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            "Vendor Advisory",
         ],
         url: "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17049",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         url: "https://security.gentoo.org/glsa/202309-06",
      },
   ],
   sourceIdentifier: "secure@microsoft.com",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-863",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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