ubuntu-cve-2018-0739
Vulnerability from osv_ubuntu
Published
2018-03-27 00:00
Modified
2026-04-22 07:38
Summary
Details

Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).

Severity
6.5 (Medium)
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.0.0",
            "binary_version": "1.0.1f-1ubuntu2.24"
          },
          {
            "binary_name": "openssl",
            "binary_version": "1.0.1f-1ubuntu2.24"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:14.04:LTS",
        "name": "openssl",
        "purl": "pkg:deb/ubuntu/openssl@1.0.1f-1ubuntu2.24?arch=source\u0026distro=trusty"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.1f-1ubuntu2.24"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.1e-3ubuntu1",
        "1.0.1e-4ubuntu1",
        "1.0.1e-4ubuntu2",
        "1.0.1e-4ubuntu3",
        "1.0.1e-4ubuntu4",
        "1.0.1f-1ubuntu1",
        "1.0.1f-1ubuntu2",
        "1.0.1f-1ubuntu2.1",
        "1.0.1f-1ubuntu2.2",
        "1.0.1f-1ubuntu2.3",
        "1.0.1f-1ubuntu2.4",
        "1.0.1f-1ubuntu2.5",
        "1.0.1f-1ubuntu2.7",
        "1.0.1f-1ubuntu2.8",
        "1.0.1f-1ubuntu2.11",
        "1.0.1f-1ubuntu2.12",
        "1.0.1f-1ubuntu2.15",
        "1.0.1f-1ubuntu2.16",
        "1.0.1f-1ubuntu2.17",
        "1.0.1f-1ubuntu2.18",
        "1.0.1f-1ubuntu2.19",
        "1.0.1f-1ubuntu2.20",
        "1.0.1f-1ubuntu2.21",
        "1.0.1f-1ubuntu2.22",
        "1.0.1f-1ubuntu2.23"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.0.0",
            "binary_version": "1.0.2g-1ubuntu4.11"
          },
          {
            "binary_name": "openssl",
            "binary_version": "1.0.2g-1ubuntu4.11"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "openssl",
        "purl": "pkg:deb/ubuntu/openssl@1.0.2g-1ubuntu4.11?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.2g-1ubuntu4.11"
            }
          ],
          "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"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.1",
            "binary_version": "1.1.0g-2ubuntu3"
          },
          {
            "binary_name": "openssl",
            "binary_version": "1.1.0g-2ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "openssl",
        "purl": "pkg:deb/ubuntu/openssl@1.1.0g-2ubuntu3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.1.0g-2ubuntu3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.2g-1ubuntu13",
        "1.0.2g-1ubuntu14",
        "1.0.2n-1ubuntu1",
        "1.1.0g-2ubuntu1",
        "1.1.0g-2ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "libssl1.0.0",
            "binary_version": "1.0.2n-1ubuntu5"
          },
          {
            "binary_name": "openssl1.0",
            "binary_version": "1.0.2n-1ubuntu5"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "openssl1.0",
        "purl": "pkg:deb/ubuntu/openssl1.0@1.0.2n-1ubuntu5?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.0.2n-1ubuntu5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.2n-1ubuntu2",
        "1.0.2n-1ubuntu3",
        "1.0.2n-1ubuntu4"
      ]
    }
  ],
  "aliases": [],
  "details": "Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).",
  "id": "UBUNTU-CVE-2018-0739",
  "modified": "2026-04-22T07:38:28Z",
  "published": "2018-03-27T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2018-0739"
    },
    {
      "type": "REPORT",
      "url": "https://www.openssl.org/news/secadv/20180327.txt"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3611-1"
    },
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-3611-2"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2018-0739"
    }
  ],
  "related": [
    "USN-3611-1",
    "USN-3611-2"
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2018-0739"
  ]
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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