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High

Security advisory

Type: advisorySources: OSVCVE: CVE-2018-16837

Ansible "User" module leaks any data which is passed on as a parameter to ssh-keygen. This could lean in undesirable situations such as passphrases credentials passed as a parameter for the ssh-keygen executable. Showing those credentials in clear text form for every user which have access just to the process list.

Products
Not specified
Affected versions
Not specified
Fixed versions
Not specified
CVEs
CVE-2018-16837
Confirmed fixed CVEs
Not specified
Updated in this feed
1 Nov 2026, 04:12 UTC · Revision 1

Source evidence

CVE-2018-16837

core-osv · Original source

Published 23 Oct 2018, 15:29 UTC

Ansible "User" module leaks any data which is passed on as a parameter to ssh-keygen. This could lean in undesirable situations such as passphrases credentials passed as a parameter for the ssh-keygen executable. Showing those credentials in clear text form for every user which have access just to the process list.

osv:CVE-2018-16837
Complete source record
{
  "id": "1d006c4e481794006792386bed443388c35c42245602e139c2a19705bb3dcbe4",
  "url": "https://osv.dev/vulnerability/CVE-2018-16837",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2018-16837",
    "summary": "Ansible \"User\" module leaks any data which is passed on as a parameter to ssh-keygen. This could lean in undesirable situations such as passphrases credentials passed as a parameter for the ssh-keygen executable. Showing those credentials in clear text form for every user which have access just to the process list.",
    "evidence": "osv:CVE-2018-16837",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2018-16837",
      "aliases": [
        "CVE-2018-16837",
        "GHSA-hwrm-63v2-42g4",
        "PYSEC-2018-44"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ansible/ansible",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2c2dd1a1b3eca6248979e04e70afff6dd3fcf366"
                },
                {
                  "last_affected": "0a07068054090d5b78b27496aa251be74c484b45"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:ansible_engine:2.5:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.5"
                      },
                      {
                        "last_affected": "2.5"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:redhat:ansible_engine:2.6:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.6"
                      },
                      {
                        "last_affected": "2.6"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:redhat:ansible_engine:2.7:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "2.7"
                      },
                      {
                        "last_affected": "2.7"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.5",
            "2.6",
            "2.7"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-16837.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:15.186352676Z",
      "provider": "osv",
      "references": [
        "https://usn.ubuntu.com/4072-1/",
        "https://access.redhat.com/errata/RHSA-2018:3460",
        "https://access.redhat.com/errata/RHSA-2018:3461",
        "https://access.redhat.com/errata/RHSA-2018:3462",
        "https://access.redhat.com/errata/RHSA-2018:3463",
        "https://access.redhat.com/errata/RHSA-2018:3505",
        "https://access.redhat.com/security/cve/cve-2018-16837",
        "https://lists.debian.org/debian-lts-announce/2018/11/msg00012.html",
        "https://www.debian.org/security/2019/dsa-4396",
        "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16837"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "8.0"
                  },
                  {
                    "last_affected": "8.0"
                  },
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:ansible_engine:2.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:ansible_engine",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "2.0"
                  },
                  {
                    "last_affected": "2.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:redhat:ansible_tower:3.3.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "redhat:ansible_tower",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "3.3.0"
                  },
                  {
                    "last_affected": "3.3.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2018-16837",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429115,
  "published_at": "2018-10-23T15:29:00.607+00:00"
}