gsd-2020-13777
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.
Aliases
Aliases
CVE-2020-13777


To clipboard 

{
   GSD: {
      alias: "CVE-2020-13777",
      description: "GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.",
      id: "GSD-2020-13777",
      references: [
         "https://www.suse.com/security/cve/CVE-2020-13777.html",
         "https://www.debian.org/security/2020/dsa-4697",
         "https://access.redhat.com/errata/RHSA-2020:2639",
         "https://access.redhat.com/errata/RHSA-2020:2638",
         "https://access.redhat.com/errata/RHSA-2020:2637",
         "https://ubuntu.com/security/CVE-2020-13777",
         "https://advisories.mageia.org/CVE-2020-13777.html",
         "https://security.archlinux.org/CVE-2020-13777",
         "https://linux.oracle.com/cve/CVE-2020-13777.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2020-13777",
         ],
         details: "GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.",
         id: "GSD-2020-13777",
         modified: "2023-12-13T01:21:47.404020Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "cve@mitre.org",
            ID: "CVE-2020-13777",
            STATE: "PUBLIC",
         },
         affects: {
            vendor: {
               vendor_data: [
                  {
                     product: {
                        product_data: [
                           {
                              product_name: "n/a",
                              version: {
                                 version_data: [
                                    {
                                       version_value: "n/a",
                                    },
                                 ],
                              },
                           },
                        ],
                     },
                     vendor_name: "n/a",
                  },
               ],
            },
         },
         data_format: "MITRE",
         data_type: "CVE",
         data_version: "4.0",
         description: {
            description_data: [
               {
                  lang: "eng",
                  value: "GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "n/a",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03",
                  refsource: "CONFIRM",
                  url: "https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03",
               },
               {
                  name: "DSA-4697",
                  refsource: "DEBIAN",
                  url: "https://www.debian.org/security/2020/dsa-4697",
               },
               {
                  name: "FEDORA-2020-0cce3578e2",
                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VMB3UGI5H5RCFRU6OGRPMNUCNLJGEN7Y/",
               },
               {
                  name: "GLSA-202006-01",
                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/202006-01",
               },
               {
                  name: "USN-4384-1",
                  refsource: "UBUNTU",
                  url: "https://usn.ubuntu.com/4384-1/",
               },
               {
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               },
               {
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                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P/",
               },
               {
                  name: "FEDORA-2020-ea11cb5ccc",
                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RRQBFK3UZ7SV76IYDTS4PS6ABS2DSJHK/",
               },
               {
                  name: "FEDORA-2020-4f78f122a3",
                  refsource: "FEDORA",
                  url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6RTXZOXC4MHTFE2HKY6IAZMF2WHD2WMV/",
               },
               {
                  name: "https://security.netapp.com/advisory/ntap-20200619-0004/",
                  refsource: "CONFIRM",
                  url: "https://security.netapp.com/advisory/ntap-20200619-0004/",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:gnu:gnutls:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndExcluding: "3.6.14",
                        versionStartIncluding: "3.6.0",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*",
                        cpe_name: [],
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                     },
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*",
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                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "cve@mitre.org",
               ID: "CVE-2020-13777",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "GnuTLS 3.6.x before 3.6.14 uses incorrect cryptography for encrypting a session ticket (a loss of confidentiality in TLS 1.2, and an authentication bypass in TLS 1.3). The earliest affected version is 3.6.4 (2018-09-24) because of an error in a 2018-09-18 commit. Until the first key rotation, the TLS server always uses wrong data in place of an encryption key derived from an application.",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-327",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03",
                     refsource: "CONFIRM",
                     tags: [
                        "Vendor Advisory",
                     ],
                     url: "https://gnutls.org/security-new.html#GNUTLS-SA-2020-06-03",
                  },
                  {
                     name: "DSA-4697",
                     refsource: "DEBIAN",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://www.debian.org/security/2020/dsa-4697",
                  },
                  {
                     name: "FEDORA-2020-0cce3578e2",
                     refsource: "FEDORA",
                     tags: [
                        "Mailing List",
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                     ],
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                  },
                  {
                     name: "GLSA-202006-01",
                     refsource: "GENTOO",
                     tags: [
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                     ],
                     url: "https://security.gentoo.org/glsa/202006-01",
                  },
                  {
                     name: "USN-4384-1",
                     refsource: "UBUNTU",
                     tags: [
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                     url: "https://usn.ubuntu.com/4384-1/",
                  },
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                     refsource: "SUSE",
                     tags: [
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                     url: "http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00015.html",
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                     url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6C4DHUKV6M6SJ5CV6KVHZNHNF7HCUE5P/",
                  },
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                  },
                  {
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                     url: "https://security.netapp.com/advisory/ntap-20200619-0004/",
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               ],
            },
         },
         impact: {
            baseMetricV2: {
               acInsufInfo: false,
               cvssV2: {
                  accessComplexity: "MEDIUM",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 5.8,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "PARTIAL",
                  vectorString: "AV:N/AC:M/Au:N/C:P/I:P/A:N",
                  version: "2.0",
               },
               exploitabilityScore: 8.6,
               impactScore: 4.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "HIGH",
                  attackVector: "NETWORK",
                  availabilityImpact: "NONE",
                  baseScore: 7.4,
                  baseSeverity: "HIGH",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "HIGH",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
                  version: "3.1",
               },
               exploitabilityScore: 2.2,
               impactScore: 5.2,
            },
         },
         lastModifiedDate: "2023-03-01T16:48Z",
         publishedDate: "2020-06-04T07:15Z",
      },
   },
}


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