USN-4294-1 (UBUNTU-CVE-2020-8793)

Vulnerability from osv_ubuntu – Published: 2020-03-02 18:17 – Updated: 2026-04-27 14:11 – Source website
VLAI
Summary
OpenSMTPD vulnerabilities
Details

It was discovered that OpenSMTPD mishandled certain input. A remote, unauthenticated attacker could use this vulnerability to execute arbitrary shell commands as any non-root user. (CVE-2020-8794)

It was discovered that OpenSMTPD did not properly handle hardlinks under certain conditions. An unprivileged local attacker could read the first line of any file on the filesystem. (CVE-2020-8793)

References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "cves_map": {
          "cves": [
            {
              "id": "CVE-2020-8793",
              "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-2020-8794",
              "severity": [
                {
                  "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                  "type": "CVSS_V3"
                },
                {
                  "score": "high",
                  "type": "Ubuntu"
                }
              ]
            }
          ],
          "ecosystem": "Ubuntu:18.04:LTS"
        }
      },
      "ecosystem_specific": {
        "availability": "No subscription required",
        "binaries": [
          {
            "binary_name": "opensmtpd",
            "binary_version": "6.0.3p1-1ubuntu0.2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "opensmtpd",
        "purl": "pkg:deb/ubuntu/opensmtpd@6.0.3p1-1ubuntu0.2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.0.3p1-1ubuntu0.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "6.0.2p1-2build1",
        "6.0.3p1-1",
        "6.0.3p1-1build1",
        "6.0.3p1-1ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "It was discovered that OpenSMTPD mishandled certain input. A remote,\nunauthenticated attacker could use this vulnerability to execute arbitrary\nshell commands as any non-root user. (CVE-2020-8794)\n\nIt was discovered that OpenSMTPD did not properly handle hardlinks under\ncertain conditions. An unprivileged local attacker could read the first\nline of any file on the filesystem. (CVE-2020-8793)\n",
  "id": "USN-4294-1",
  "modified": "2026-04-27T14:11:25Z",
  "published": "2020-03-02T18:17:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://ubuntu.com/security/notices/USN-4294-1"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-8793"
    },
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-8794"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "summary": "OpenSMTPD vulnerabilities",
  "upstream": [
    "UBUNTU-CVE-2020-8793",
    "UBUNTU-CVE-2020-8794"
  ]
}



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