usn-4504-1
Vulnerability from osv_ubuntu
Published
2020-09-16 13:58
Modified
2026-04-27 14:11
Summary
openssl, openssl1.0 vulnerabilities
Details

Robert Merget, Marcus Brinkmann, Nimrod Aviram, and Juraj Somorovsky discovered that certain Diffie-Hellman ciphersuites in the TLS specification and implemented by OpenSSL contained a flaw. A remote attacker could possibly use this issue to eavesdrop on encrypted communications. This was fixed in this update by removing the insecure ciphersuites from OpenSSL. (CVE-2020-1968)

Cesar Pereida García, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin, Alejandro Cabrera Aldaya, and Billy Brumley discovered that OpenSSL incorrectly handled ECDSA signatures. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1547)

Guido Vranken discovered that OpenSSL incorrectly performed the x86_64 Montgomery squaring procedure. While unlikely, a remote attacker could possibly use this issue to recover private keys. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1551)

Bernd Edlinger discovered that OpenSSL incorrectly handled certain decryption functions. In certain scenarios, a remote attacker could possibly use this issue to perform a padding oracle attack and decrypt traffic. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1563)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-1968",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:16.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.0.0",
            "binary_version": "1.0.2g-1ubuntu4.17"
          },
          {
            "binary_name": "openssl",
            "binary_version": "1.0.2g-1ubuntu4.17"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "openssl",
        "purl": "pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.17?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.2g-1ubuntu4.17"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.2d-0ubuntu1",
        "1.0.2d-0ubuntu2",
        "1.0.2e-1ubuntu1",
        "1.0.2f-2ubuntu1",
        "1.0.2g-1ubuntu2",
        "1.0.2g-1ubuntu3",
        "1.0.2g-1ubuntu4",
        "1.0.2g-1ubuntu4.1",
        "1.0.2g-1ubuntu4.2",
        "1.0.2g-1ubuntu4.4",
        "1.0.2g-1ubuntu4.5",
        "1.0.2g-1ubuntu4.6",
        "1.0.2g-1ubuntu4.8",
        "1.0.2g-1ubuntu4.9",
        "1.0.2g-1ubuntu4.10",
        "1.0.2g-1ubuntu4.11",
        "1.0.2g-1ubuntu4.12",
        "1.0.2g-1ubuntu4.13",
        "1.0.2g-1ubuntu4.14",
        "1.0.2g-1ubuntu4.15",
        "1.0.2g-1ubuntu4.16"
      ]
    },
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2019-1547",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-1551",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2019-1563",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            },
            {
              "id": "CVE-2020-1968",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
                  "type": "CVSS_V3"
                },
                {
                  "score": "low",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.0.0",
            "binary_version": "1.0.2n-1ubuntu5.4"
          },
          {
            "binary_name": "openssl1.0",
            "binary_version": "1.0.2n-1ubuntu5.4"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "openssl1.0",
        "purl": "pkg:deb/ubuntu/openssl1.0@1.0.2n-1ubuntu5.4?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.2n-1ubuntu5.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.2n-1ubuntu2",
        "1.0.2n-1ubuntu3",
        "1.0.2n-1ubuntu4",
        "1.0.2n-1ubuntu5",
        "1.0.2n-1ubuntu5.1",
        "1.0.2n-1ubuntu5.2",
        "1.0.2n-1ubuntu5.3"
      ]
    }
  ],
  "aliases": [],
  "details": "Robert Merget, Marcus Brinkmann, Nimrod Aviram, and Juraj Somorovsky\ndiscovered that certain Diffie-Hellman ciphersuites in the TLS\nspecification and implemented by OpenSSL contained a flaw. A remote\nattacker could possibly use this issue to eavesdrop on encrypted\ncommunications. This was fixed in this update by removing the insecure\nciphersuites from OpenSSL. (CVE-2020-1968)\n\nCesar Pereida Garc\u00eda, Sohaib ul Hassan, Nicola Tuveri, Iaroslav Gridin,\nAlejandro Cabrera Aldaya, and Billy Brumley discovered that OpenSSL\nincorrectly handled ECDSA signatures. An attacker could possibly use this\nissue to perform a timing side-channel attack and recover private ECDSA\nkeys. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1547)\n\nGuido Vranken discovered that OpenSSL incorrectly performed the x86_64\nMontgomery squaring procedure. While unlikely, a remote attacker could\npossibly use this issue to recover private keys. This issue only affected\nUbuntu 18.04 LTS. (CVE-2019-1551)\n\nBernd Edlinger discovered that OpenSSL incorrectly handled certain\ndecryption functions. In certain scenarios, a remote attacker could\npossibly use this issue to perform a padding oracle attack and decrypt\ntraffic. This issue only affected Ubuntu 18.04 LTS. (CVE-2019-1563)\n\n",
  "id": "USN-4504-1",
  "modified": "2026-04-27T14:11:25Z",
  "published": "2020-09-16T13:58:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4504-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-1547"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-1551"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-1563"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-1968"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "openssl, openssl1.0 vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2019-1547",
    "UBUNTU-CVE-2019-1551",
    "UBUNTU-CVE-2019-1563",
    "UBUNTU-CVE-2020-1968"
  ]
}



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