ubuntu-cve-2020-21469
Vulnerability from osv_ubuntu
Published
2023-08-22 19:16
Modified
2026-04-22 07:39
Summary
Details

An issue was discovered in PostgreSQL 12.2 allows attackers to cause a denial of service via repeatedly sending SIGHUP signals. NOTE: this is disputed by the vendor because untrusted users cannot send SIGHUP signals; they can only be sent by a PostgreSQL superuser, a user with pg_reload_conf access, or a user with sufficient privileges at the OS level (the postgres account or the root account).

Severity
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/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": "libecpg-compat3",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "libecpg6",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "libpgtypes3",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "libpq5",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-client-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-doc-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-plperl-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-plpython3-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-pltcl-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          },
          {
            "binary_name": "postgresql-server-dev-12",
            "binary_version": "12.5-0ubuntu0.20.04.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "postgresql-12",
        "purl": "pkg:deb/ubuntu/postgresql-12@12.5-0ubuntu0.20.04.1?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12.5-0ubuntu0.20.04.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "12.0-1",
        "12.1-1",
        "12.1-2build1",
        "12.2-1",
        "12.2-1ubuntu2",
        "12.2-4",
        "12.4-0ubuntu0.20.04.1"
      ]
    }
  ],
  "aliases": [],
  "details": "An issue was discovered in PostgreSQL 12.2 allows attackers to cause a denial of service via repeatedly sending SIGHUP signals. NOTE: this is disputed by the vendor because untrusted users cannot send SIGHUP signals; they can only be sent by a PostgreSQL superuser, a user with pg_reload_conf access, or a user with sufficient privileges at the OS level (the postgres account or the root account).",
  "id": "UBUNTU-CVE-2020-21469",
  "modified": "2026-04-22T07:39:30Z",
  "published": "2023-08-22T19:16:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2020-21469"
    },
    {
      "type": "REPORT",
      "url": "https://www.postgresql.org/message-id/CAA8ZSMqAHDCgo07hqKoM5XJaoQy6Vv76O7966agez4ffyQktkA%40mail.gmail.com"
    },
    {
      "type": "REPORT",
      "url": "https://www.postgresql.org/about/news/cve-2020-21469-is-not-a-security-vulnerability-2701/"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-21469"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2020-21469"
  ]
}



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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.