Vulnerability-Lookup

ubuntu-cve-2016-0739

Vulnerability from osv_ubuntu

Published

2016-02-23 15:00

Modified

2026-04-22 07:37

Summary

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."

Severity

5.9 (Medium)


                    
                      CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2016-0739	REPORT
	https://www.libssh2.org/adv_20160223.html	REPORT
	https://www.libssh.org/2016/02/23/libssh-0-7-3-se…	REPORT
	https://ubuntu.com/security/notices/USN-2912-1	ADVISORY
	https://www.cve.org/CVERecord?id=CVE-2016-0739	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.6.1-0ubuntu3.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "libssh",
        "purl": "pkg:deb/ubuntu/libssh@0.6.1-0ubuntu3.3?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.1-0ubuntu3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.4-1",
        "0.6.1-0ubuntu2",
        "0.6.1-0ubuntu3",
        "0.6.1-0ubuntu3.1"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.6.3-4.2ubuntu1"
          },
          {
            "binary_name": "libssh-gcrypt-4",
            "binary_version": "0.6.3-4.2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "libssh",
        "purl": "pkg:deb/ubuntu/libssh@0.6.3-4.2ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.3-4.2ubuntu1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.6.3-3ubuntu3",
        "0.6.3-4.1",
        "0.6.3-4.2"
      ]
    }
  ],
  "aliases": [],
  "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": "UBUNTU-CVE-2016-0739",
  "modified": "2026-04-22T07:37:53Z",
  "published": "2016-02-23T15:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-0739"
    },
    {
      "type": "REPORT",
      "url": "https://www.libssh2.org/adv_20160223.html"
    },
    {
      "type": "REPORT",
      "url": "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-2912-1"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2016-0739"
    }
  ],
  "related": [
    "USN-2912-1"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2016-0739"
  ]
}

CVE-2016-0739 (GCVE-0-2016-0739)

Vulnerability from cvelistv5 – Published: 2016-04-13 17:00 – Updated: 2024-08-05 22:30

Summary

Severity

No CVSS data available.

CWE

Assigner

redhat

References

10 references

URL	Tags
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
http://www.ubuntu.com/usn/USN-2912-1	vendor-advisoryx_refsource_UBUNTU
https://www.libssh.org/security/advisories/CVE-20…	x_refsource_CONFIRM
https://puppet.com/security/cve/CVE-2016-0739	x_refsource_CONFIRM
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
https://security.gentoo.org/glsa/201606-12	vendor-advisoryx_refsource_GENTOO
http://www.debian.org/security/2016/dsa-3488	vendor-advisoryx_refsource_DEBIAN
http://rhn.redhat.com/errata/RHSA-2016-0566.html	vendor-advisoryx_refsource_REDHAT
https://www.libssh.org/2016/02/23/libssh-0-7-3-se…	x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-updates/2016-0…	vendor-advisoryx_refsource_SUSE

Date Public

2016-02-23 00:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-05T22:30:04.158Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "FEDORA-2016-d9f950c779",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html"
          },
          {
            "name": "USN-2912-1",
            "tags": [
              "vendor-advisory",
              "x_refsource_UBUNTU",
              "x_transferred"
            ],
            "url": "http://www.ubuntu.com/usn/USN-2912-1"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.libssh.org/security/advisories/CVE-2016-0739.txt"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://puppet.com/security/cve/CVE-2016-0739"
          },
          {
            "name": "FEDORA-2016-dc9e8da03c",
            "tags": [
              "vendor-advisory",
              "x_refsource_FEDORA",
              "x_transferred"
            ],
            "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html"
          },
          {
            "name": "GLSA-201606-12",
            "tags": [
              "vendor-advisory",
              "x_refsource_GENTOO",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/201606-12"
          },
          {
            "name": "DSA-3488",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "http://www.debian.org/security/2016/dsa-3488"
          },
          {
            "name": "RHSA-2016:0566",
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT",
              "x_transferred"
            ],
            "url": "http://rhn.redhat.com/errata/RHSA-2016-0566.html"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/"
          },
          {
            "name": "openSUSE-SU-2016:0880",
            "tags": [
              "vendor-advisory",
              "x_refsource_SUSE",
              "x_transferred"
            ],
            "url": "http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "datePublic": "2016-02-23T00:00:00.000Z",
      "descriptions": [
        {
          "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.\""
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2017-12-08T10:57:01.000Z",
        "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
        "shortName": "redhat"
      },
      "references": [
        {
          "name": "FEDORA-2016-d9f950c779",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178058.html"
        },
        {
          "name": "USN-2912-1",
          "tags": [
            "vendor-advisory",
            "x_refsource_UBUNTU"
          ],
          "url": "http://www.ubuntu.com/usn/USN-2912-1"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.libssh.org/security/advisories/CVE-2016-0739.txt"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://puppet.com/security/cve/CVE-2016-0739"
        },
        {
          "name": "FEDORA-2016-dc9e8da03c",
          "tags": [
            "vendor-advisory",
            "x_refsource_FEDORA"
          ],
          "url": "http://lists.fedoraproject.org/pipermail/package-announce/2016-March/178822.html"
        },
        {
          "name": "GLSA-201606-12",
          "tags": [
            "vendor-advisory",
            "x_refsource_GENTOO"
          ],
          "url": "https://security.gentoo.org/glsa/201606-12"
        },
        {
          "name": "DSA-3488",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "http://www.debian.org/security/2016/dsa-3488"
        },
        {
          "name": "RHSA-2016:0566",
          "tags": [
            "vendor-advisory",
            "x_refsource_REDHAT"
          ],
          "url": "http://rhn.redhat.com/errata/RHSA-2016-0566.html"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.libssh.org/2016/02/23/libssh-0-7-3-security-and-bugfix-release/"
        },
        {
          "name": "openSUSE-SU-2016:0880",
          "tags": [
            "vendor-advisory",
            "x_refsource_SUSE"
          ],
          "url": "http://lists.opensuse.org/opensuse-updates/2016-03/msg00111.html"
        }
      ],
      "x_legacyV4Record": {
        "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"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
    "assignerShortName": "redhat",
    "cveId": "CVE-2016-0739",
    "datePublished": "2016-04-13T17:00:00.000Z",
    "dateReserved": "2015-12-16T00:00:00.000Z",
    "dateUpdated": "2024-08-05T22:30:04.158Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

usn-2912-1

Vulnerability from osv_ubuntu

Published

2016-02-23 14:14

Modified

2026-04-22 07:36

Summary

libssh vulnerabilities

Details

Mariusz Ziulek discovered that libssh incorrectly handled certain packets. A remote attacker could possibly use this issue to cause libssh to crash, resulting in a denial of service. (CVE-2015-3146)

Aris Adamantiadis discovered that libssh incorrectly generated ephemeral secret keys of 128 bits instead of the recommended 1024 or 2048 bits when using the diffie-hellman-group1 and diffie-hellman-group14 methods. If a remote attacker were able to perform a machine-in-the-middle attack, this flaw could be exploited to view sensitive information. (CVE-2016-0739)

References

URL

Type

	https://ubuntu.com/security/notices/USN-2912-1	ADVISORY
	https://ubuntu.com/security/CVE-2015-3146	REPORT
	https://ubuntu.com/security/CVE-2016-0739	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2015-3146",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2016-0739",
              "severity": [
                {
                  "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "medium",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:14.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssh-4",
            "binary_version": "0.6.1-0ubuntu3.3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "libssh",
        "purl": "pkg:deb/ubuntu/libssh@0.6.1-0ubuntu3.3?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.6.1-0ubuntu3.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "0.5.4-1",
        "0.6.1-0ubuntu2",
        "0.6.1-0ubuntu3",
        "0.6.1-0ubuntu3.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Mariusz Ziulek discovered that libssh incorrectly handled certain packets.\nA remote attacker could possibly use this issue to cause libssh to crash,\nresulting in a denial of service.\n(CVE-2015-3146)\n\nAris Adamantiadis discovered that libssh incorrectly generated ephemeral\nsecret keys of 128 bits instead of the recommended 1024 or 2048 bits when\nusing the diffie-hellman-group1 and diffie-hellman-group14 methods. If a\nremote attacker were able to perform a machine-in-the-middle attack, this flaw\ncould be exploited to view sensitive information. (CVE-2016-0739)\n",
  "id": "USN-2912-1",
  "modified": "2026-04-22T07:36:33Z",
  "published": "2016-02-23T14:14:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-2912-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2015-3146"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2016-0739"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "libssh vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2015-3146",
    "UBUNTU-CVE-2016-0739"
  ]
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2016-0739

Vulnerability from osv_ubuntu

CVE-2016-0739 (GCVE-0-2016-0739)

usn-2912-1

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature