gsd-2016-0787
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."
Aliases
Aliases
CVE-2016-0787


To clipboard 

{
   GSD: {
      alias: "CVE-2016-0787",
      description: "The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"",
      id: "GSD-2016-0787",
      references: [
         "https://www.suse.com/security/cve/CVE-2016-0787.html",
         "https://www.debian.org/security/2016/dsa-3487",
         "https://access.redhat.com/errata/RHSA-2016:0428",
         "https://advisories.mageia.org/CVE-2016-0787.html",
         "https://alas.aws.amazon.com/cve/html/CVE-2016-0787.html",
         "https://linux.oracle.com/cve/CVE-2016-0787.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2016-0787",
         ],
         details: "The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"",
         id: "GSD-2016-0787",
         modified: "2023-12-13T01:21:17.489026Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "secalert@redhat.com",
            ID: "CVE-2016-0787",
            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: "The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"",
               },
            ],
         },
         problemtype: {
            problemtype_data: [
               {
                  description: [
                     {
                        lang: "eng",
                        value: "n/a",
                     },
                  ],
               },
            ],
         },
         references: {
            reference_data: [
               {
                  name: "FEDORA-2016-215a2219b1",
                  refsource: "FEDORA",
                  url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html",
               },
               {
                  name: "https://kc.mcafee.com/corporate/index?page=content&id=SB10156",
                  refsource: "CONFIRM",
                  url: "https://kc.mcafee.com/corporate/index?page=content&id=SB10156",
               },
               {
                  name: "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html",
                  refsource: "CONFIRM",
                  url: "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html",
               },
               {
                  name: "https://www.libssh2.org/CVE-2016-0787.patch",
                  refsource: "CONFIRM",
                  url: "https://www.libssh2.org/CVE-2016-0787.patch",
               },
               {
                  name: "https://www.libssh2.org/adv_20160223.html",
                  refsource: "CONFIRM",
                  url: "https://www.libssh2.org/adv_20160223.html",
               },
               {
                  name: "https://puppet.com/security/cve/CVE-2016-0787",
                  refsource: "CONFIRM",
                  url: "https://puppet.com/security/cve/CVE-2016-0787",
               },
               {
                  name: "FEDORA-2016-7942ee2cc5",
                  refsource: "FEDORA",
                  url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html",
               },
               {
                  name: "GLSA-201606-12",
                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/201606-12",
               },
               {
                  name: "openSUSE-SU-2016:0639",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html",
               },
               {
                  name: "https://bto.bluecoat.com/security-advisory/sa120",
                  refsource: "CONFIRM",
                  url: "https://bto.bluecoat.com/security-advisory/sa120",
               },
               {
                  name: "DSA-3487",
                  refsource: "DEBIAN",
                  url: "http://www.debian.org/security/2016/dsa-3487",
               },
               {
                  name: "82514",
                  refsource: "BID",
                  url: "http://www.securityfocus.com/bid/82514",
               },
            ],
         },
      },
      "gitlab.com": {
         advisories: [
            {
               affected_range: "(,1.6.0]",
               affected_versions: "All versions up to 1.6.0",
               cvss_v2: "AV:N/AC:M/Au:N/C:P/I:N/A:N",
               cvss_v3: "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
               cwe_ids: [
                  "CWE-1035",
                  "CWE-200",
                  "CWE-937",
               ],
               date: "2018-10-30",
               description: "The diffie_hellman_sha256 function in kex.c in libssh2 improperly truncates secrets to bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"",
               fixed_versions: [
                  "1.8.2",
               ],
               identifier: "CVE-2016-0787",
               identifiers: [
                  "CVE-2016-0787",
               ],
               not_impacted: "All versions after 1.6.0",
               package_slug: "nuget/libssh2-vc141_xp",
               pubdate: "2016-04-13",
               solution: "Upgrade to version 1.8.2 or above.",
               title: "Exposure of Sensitive Information to an Unauthorized Actor",
               urls: [
                  "https://nvd.nist.gov/vuln/detail/CVE-2016-0787",
               ],
               uuid: "a2b380ab-d6d6-4dee-9db7-9af507457ed9",
            },
         ],
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "1.6.0",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
            ],
         },
         cve: {
            CVE_data_meta: {
               ASSIGNER: "secalert@redhat.com",
               ID: "CVE-2016-0787",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a \"bits/bytes confusion bug.\"",
                  },
               ],
            },
            problemtype: {
               problemtype_data: [
                  {
                     description: [
                        {
                           lang: "en",
                           value: "CWE-200",
                        },
                     ],
                  },
               ],
            },
            references: {
               reference_data: [
                  {
                     name: "FEDORA-2016-215a2219b1",
                     refsource: "FEDORA",
                     tags: [],
                     url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177980.html",
                  },
                  {
                     name: "https://www.libssh2.org/CVE-2016-0787.patch",
                     refsource: "CONFIRM",
                     tags: [
                        "Patch",
                     ],
                     url: "https://www.libssh2.org/CVE-2016-0787.patch",
                  },
                  {
                     name: "FEDORA-2016-7942ee2cc5",
                     refsource: "FEDORA",
                     tags: [],
                     url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178573.html",
                  },
                  {
                     name: "DSA-3487",
                     refsource: "DEBIAN",
                     tags: [],
                     url: "http://www.debian.org/security/2016/dsa-3487",
                  },
                  {
                     name: "openSUSE-SU-2016:0639",
                     refsource: "SUSE",
                     tags: [],
                     url: "http://lists.opensuse.org/opensuse-updates/2016-03/msg00008.html",
                  },
                  {
                     name: "https://www.libssh2.org/adv_20160223.html",
                     refsource: "CONFIRM",
                     tags: [
                        "Vendor Advisory",
                     ],
                     url: "https://www.libssh2.org/adv_20160223.html",
                  },
                  {
                     name: "GLSA-201606-12",
                     refsource: "GENTOO",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://security.gentoo.org/glsa/201606-12",
                  },
                  {
                     name: "https://kc.mcafee.com/corporate/index?page=content&id=SB10156",
                     refsource: "CONFIRM",
                     tags: [],
                     url: "https://kc.mcafee.com/corporate/index?page=content&id=SB10156",
                  },
                  {
                     name: "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html",
                     refsource: "CONFIRM",
                     tags: [],
                     url: "http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html",
                  },
                  {
                     name: "https://bto.bluecoat.com/security-advisory/sa120",
                     refsource: "CONFIRM",
                     tags: [],
                     url: "https://bto.bluecoat.com/security-advisory/sa120",
                  },
                  {
                     name: "82514",
                     refsource: "BID",
                     tags: [],
                     url: "http://www.securityfocus.com/bid/82514",
                  },
                  {
                     name: "https://puppet.com/security/cve/CVE-2016-0787",
                     refsource: "CONFIRM",
                     tags: [],
                     url: "https://puppet.com/security/cve/CVE-2016-0787",
                  },
               ],
            },
         },
         impact: {
            baseMetricV2: {
               cvssV2: {
                  accessComplexity: "MEDIUM",
                  accessVector: "NETWORK",
                  authentication: "NONE",
                  availabilityImpact: "NONE",
                  baseScore: 4.3,
                  confidentialityImpact: "PARTIAL",
                  integrityImpact: "NONE",
                  vectorString: "AV:N/AC:M/Au:N/C:P/I:N/A:N",
                  version: "2.0",
               },
               exploitabilityScore: 8.6,
               impactScore: 2.9,
               obtainAllPrivilege: false,
               obtainOtherPrivilege: false,
               obtainUserPrivilege: false,
               severity: "MEDIUM",
               userInteractionRequired: false,
            },
            baseMetricV3: {
               cvssV3: {
                  attackComplexity: "HIGH",
                  attackVector: "NETWORK",
                  availabilityImpact: "NONE",
                  baseScore: 5.9,
                  baseSeverity: "MEDIUM",
                  confidentialityImpact: "HIGH",
                  integrityImpact: "NONE",
                  privilegesRequired: "NONE",
                  scope: "UNCHANGED",
                  userInteraction: "NONE",
                  vectorString: "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  version: "3.0",
               },
               exploitabilityScore: 2.2,
               impactScore: 3.6,
            },
         },
         lastModifiedDate: "2018-10-30T16:27Z",
         publishedDate: "2016-04-13T17:59Z",
      },
   },
}


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