MediumFix available

ansible — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2020-1733

A race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with "umask 77 && mkdir -p "; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc//cmdline'.

Products: ansible
Affected versions: Not specified
Fixed versions: 2.9.7+dfsg-1
CVEs: CVE-2020-1733
Confirmed fixed CVEs: Not specified
Updated in this feed: 1 Nov 2026, 13:28 UTC · Revision 1

Source evidence

DEBIAN-CVE-2020-1733

core-osv · Original source

Published 11 Mar 2020, 19:15 UTC

osv:DEBIAN-CVE-2020-1733

ansible

Fixed versions: 2.9.7+dfsg-1

ansible

Fixed versions: 2.9.7+dfsg-1

ansible

Fixed versions: 2.9.7+dfsg-1

Complete source record

{
  "id": "7184bab4b83d8001fc203a4685bf55872f8baf56f2ffa8307cf6c2c8d1e309fb",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2020-1733",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2020-1733",
    "summary": "A race condition flaw was found in Ansible Engine 2.7.17 and prior, 2.8.9 and prior, 2.9.6 and prior when running a playbook with an unprivileged become user. When Ansible needs to run a module with become user, the temporary directory is created in /var/tmp. This directory is created with \"umask 77 && mkdir -p \"; this operation does not fail if the directory already exists and is owned by another user. An attacker could take advantage to gain control of the become user as the target directory can be retrieved by iterating '/proc//cmdline'.",
    "evidence": "osv:DEBIAN-CVE-2020-1733",
    "products": [
      {
        "name": {
          "value": "ansible",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.7+dfsg-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "ansible",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.7+dfsg-1",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "ansible",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.9.7+dfsg-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2020-1733",
      "aliases": [
        "DEBIAN-CVE-2020-1733"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.7+dfsg-1"
                }
              ]
            }
          ],
          "package": {
            "name": "ansible",
            "purl": "pkg:deb/debian/ansible?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-1733.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.7+dfsg-1"
                }
              ]
            }
          ],
          "package": {
            "name": "ansible",
            "purl": "pkg:deb/debian/ansible?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-1733.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "2.9.7+dfsg-1"
                }
              ]
            }
          ],
          "package": {
            "name": "ansible",
            "purl": "pkg:deb/debian/ansible?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2020-1733.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T12:02:28.132402607Z",
      "provider": "osv",
      "upstream": [
        "CVE-2020-1733"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2020-1733"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2020-1733",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 452284,
  "published_at": "2020-03-11T19:15:13.03+00:00"
}