gsd-2016-0739
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 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-2016-0739


To clipboard 

{
   GSD: {
      alias: "CVE-2016-0739",
      description: "libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 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-2016-0739",
      references: [
         "https://www.suse.com/security/cve/CVE-2016-0739.html",
         "https://www.debian.org/security/2016/dsa-3488",
         "https://access.redhat.com/errata/RHSA-2016:0566",
         "https://ubuntu.com/security/CVE-2016-0739",
         "https://advisories.mageia.org/CVE-2016-0739.html",
      ],
   },
   gsd: {
      metadata: {
         exploitCode: "unknown",
         remediation: "unknown",
         reportConfidence: "confirmed",
         type: "vulnerability",
      },
      osvSchema: {
         aliases: [
            "CVE-2016-0739",
         ],
         details: "libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 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-2016-0739",
         modified: "2023-12-13T01:21:17.372304Z",
         schema_version: "1.4.0",
      },
   },
   namespaces: {
      "cve.org": {
         CVE_data_meta: {
            ASSIGNER: "secalert@redhat.com",
            ID: "CVE-2016-0739",
            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: "libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 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-d9f950c779",
                  refsource: "FEDORA",
                  url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html",
               },
               {
                  name: "USN-2912-1",
                  refsource: "UBUNTU",
                  url: "http://www.ubuntu.com/usn/USN-2912-1",
               },
               {
                  name: "https://www.libssh.org/security/advisories/CVE-2016-0739.txt",
                  refsource: "CONFIRM",
                  url: "https://www.libssh.org/security/advisories/CVE-2016-0739.txt",
               },
               {
                  name: "https://puppet.com/security/cve/CVE-2016-0739",
                  refsource: "CONFIRM",
                  url: "https://puppet.com/security/cve/CVE-2016-0739",
               },
               {
                  name: "FEDORA-2016-dc9e8da03c",
                  refsource: "FEDORA",
                  url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html",
               },
               {
                  name: "GLSA-201606-12",
                  refsource: "GENTOO",
                  url: "https://security.gentoo.org/glsa/201606-12",
               },
               {
                  name: "DSA-3488",
                  refsource: "DEBIAN",
                  url: "http://www.debian.org/security/2016/dsa-3488",
               },
               {
                  name: "RHSA-2016:0566",
                  refsource: "REDHAT",
                  url: "http://rhn.redhat.com/errata/RHSA-2016-0566.html",
               },
               {
                  name: "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/",
                  refsource: "CONFIRM",
                  url: "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/",
               },
               {
                  name: "openSUSE-SU-2016:0880",
                  refsource: "SUSE",
                  url: "http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html",
               },
            ],
         },
      },
      "nvd.nist.gov": {
         configurations: {
            CVE_data_version: "4.0",
            nodes: [
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                     {
                        cpe23Uri: "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
                        cpe_name: [],
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  children: [],
                  cpe_match: [
                     {
                        cpe23Uri: "cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*",
                        cpe_name: [],
                        versionEndIncluding: "0.7.2",
                        vulnerable: true,
                     },
                  ],
                  operator: "OR",
               },
               {
                  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: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-2016-0739",
            },
            data_format: "MITRE",
            data_type: "CVE",
            data_version: "4.0",
            description: {
               description_data: [
                  {
                     lang: "en",
                     value: "libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 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-dc9e8da03c",
                     refsource: "FEDORA",
                     tags: [],
                     url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html",
                  },
                  {
                     name: "RHSA-2016:0566",
                     refsource: "REDHAT",
                     tags: [],
                     url: "http://rhn.redhat.com/errata/RHSA-2016-0566.html",
                  },
                  {
                     name: "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/",
                     refsource: "CONFIRM",
                     tags: [
                        "Vendor Advisory",
                     ],
                     url: "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/",
                  },
                  {
                     name: "USN-2912-1",
                     refsource: "UBUNTU",
                     tags: [],
                     url: "http://www.ubuntu.com/usn/USN-2912-1",
                  },
                  {
                     name: "https://www.libssh.org/security/advisories/CVE-2016-0739.txt",
                     refsource: "CONFIRM",
                     tags: [
                        "Vendor Advisory",
                     ],
                     url: "https://www.libssh.org/security/advisories/CVE-2016-0739.txt",
                  },
                  {
                     name: "FEDORA-2016-d9f950c779",
                     refsource: "FEDORA",
                     tags: [],
                     url: "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html",
                  },
                  {
                     name: "DSA-3488",
                     refsource: "DEBIAN",
                     tags: [],
                     url: "http://www.debian.org/security/2016/dsa-3488",
                  },
                  {
                     name: "GLSA-201606-12",
                     refsource: "GENTOO",
                     tags: [
                        "Third Party Advisory",
                     ],
                     url: "https://security.gentoo.org/glsa/201606-12",
                  },
                  {
                     name: "openSUSE-SU-2016:0880",
                     refsource: "SUSE",
                     tags: [],
                     url: "http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html",
                  },
                  {
                     name: "https://puppet.com/security/cve/CVE-2016-0739",
                     refsource: "CONFIRM",
                     tags: [],
                     url: "https://puppet.com/security/cve/CVE-2016-0739",
                  },
               ],
            },
         },
         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: "2017-12-09T02:29Z",
         publishedDate: "2016-04-13T17:59Z",
      },
   },
}


Log in or create an account to share your comment.

Security Advisory comment format.

This schema specifies the format of a comment related to a security advisory.

UUIDv4 of the comment
UUIDv4 of the Vulnerability-Lookup instance
When the comment was created originally
When the comment was last updated
Title of the comment
Description of the comment
The identifier of the vulnerability (CVE ID, GHSA-ID, PYSEC ID, etc.).



Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.