{
  "schema_version": "1.7.0",
  "id": "USN-5259-1",
  "summary": "cron vulnerabilities",
  "details": "It was discovered that the postinst maintainer script in Cron unsafely\nhandled file permissions during package install or update operations.\nAn attacker could possibly use this issue to perform a privilege\nescalation attack. (CVE-2017-9525)\n\nFlorian Weimer discovered that Cron incorrectly handled certain memory\noperations during crontab file creation. An attacker could possibly use\nthis issue to cause a denial of service. (CVE-2019-9704)\n\nIt was discovered that Cron incorrectly handled user input during crontab\nfile creation. An attacker could possibly use this issue to cause a denial\nof service. (CVE-2019-9705)\n\nIt was discovered that Cron contained a use-after-free vulnerability in\nits force_rescan_user function. An attacker could possibly use this issue\nto cause a denial of service. (CVE-2019-9706)\n",
  "aliases": [],
  "upstream": [
    "UBUNTU-CVE-2017-9525",
    "UBUNTU-CVE-2019-9704",
    "UBUNTU-CVE-2019-9705",
    "UBUNTU-CVE-2019-9706"
  ],
  "related": [],
  "published": "2022-02-01T14:38:29Z",
  "modified": "2026-06-25T10:46:03Z",
  "affected": [
    {
      "package": {
        "ecosystem": "Ubuntu:Pro:16.04:LTS",
        "name": "cron",
        "purl": "pkg:deb/ubuntu/cron@3.0pl1-128ubuntu2+esm1?arch=source&distro=esm-infra/xenial"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.0pl1-128ubuntu2+esm1"
            }
          ]
        }
      ],
      "versions": [
        "3.0pl1-127ubuntu1",
        "3.0pl1-128ubuntu1",
        "3.0pl1-128ubuntu2"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "cron",
            "binary_version": "3.0pl1-128ubuntu2+esm1"
          }
        ],
        "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
      },
      "database_specific": {
        "cves_map": {
          "ecosystem": "Ubuntu:Pro:16.04:LTS",
          "cves": [
            {
              "id": "CVE-2019-9704",
              "severity": [
                {
                  "type": "CVSS_V3",
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                  "type": "Ubuntu",
                  "score": "low"
                }
              ]
            },
            {
              "id": "CVE-2019-9705",
              "severity": [
                {
                  "type": "CVSS_V3",
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                  "type": "Ubuntu",
                  "score": "low"
                }
              ]
            },
            {
              "id": "CVE-2019-9706",
              "severity": [
                {
                  "type": "CVSS_V3",
                  "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
                },
                {
                  "type": "Ubuntu",
                  "score": "low"
                }
              ]
            }
          ]
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-5259-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2017-9525"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-9704"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-9705"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2019-9706"
    }
  ]
}