Security advisory

{
  "id": "32adfc799ec8cb66822deb980853c3c857792ca044409a43843db7e9e98cb167",
  "url": "https://osv.dev/vulnerability/CVE-2016-9566",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-9566",
    "summary": "base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file. NOTE: this can be leveraged by remote attackers using CVE-2016-9565.",
    "evidence": "osv:CVE-2016-9566",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2016-9566",
      "aliases": [
        "CVE-2016-9566"
      ],
      "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/nagiosenterprises/nagioscore",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "290af75004de0d31a77a66d16b5688ab6a8a6664"
                },
                {
                  "fixed": "c29557dec91eba2306f5fb11b8da4474ba63f8c4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:nagios:nagios:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.2.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c29557dec91eba2306f5fb11b8da4474ba63f8c4"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "release-4.2.3",
            "nagios-4.2.3",
            "nagios-4.2.1",
            "nagios-4.1.1",
            "nagios-4.1.0",
            "nagios-4.1.0rc2",
            "nagios-4.0.6",
            "nagios-4.0.5",
            "nagios-4.0.4",
            "nagios-4.0.0",
            "nagios-4.0.0-beta4",
            "nagios-4.0.0-beta3",
            "nagios-4.0.0-beta2",
            "nagios-4.0.0-beta1",
            "nagios-3.4.1",
            "nagios-3.4.0",
            "nagios-3.3.1",
            "nagios-3.2.3",
            "nagios-3.2.2",
            "nagios-3.2.1",
            "nagios-3.2.0",
            "nagios-3.1.2",
            "nagios-3.1.1",
            "nagios-3.1.0",
            "nagios-3.0.6",
            "nagios-3.0.5",
            "nagios-3.0.4",
            "nagios-3.0.3",
            "nagios-3.0.2",
            "nagios-3.0.1",
            "nagios-3.0",
            "nagios-3.0rc3",
            "nagios-3.0rc2",
            "nagios-3.0rc1",
            "nagios-3.0b7",
            "nagios-3.0b6",
            "nagios-3.0b5",
            "nagios-3.0b4",
            "nagios-3.0b3",
            "nagios-3.0b2",
            "nagios-3.0b1",
            "nagios-3.0a5",
            "nagios-3.0a4",
            "nagios-3.0a3",
            "nagios-3.0a2",
            "nagios-3.0a1",
            "nagios-2.0",
            "nagios-2.0rc1",
            "nagios-2.0b6",
            "nagios-2.0.b5",
            "nagios-2.0b4",
            "nagios-2.0b3",
            "nagios-2.0b2",
            "nagios-2.0b1",
            "nagios-1.0b6",
            "nagios-1.0b5",
            "nagios-1.0b4",
            "nagios-1.0b3",
            "nagios-1.0b2",
            "nagios-1.0b1",
            "nagios-1.0a7",
            "nagios-1.0a6"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-9566.json"
          }
        }
      ],
      "modified": "2026-10-20T10:48:05.014280042Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2018/12/msg00014.html",
        "https://www.exploit-db.com/exploits/40921/",
        "https://security.gentoo.org/glsa/201612-51",
        "https://security.gentoo.org/glsa/201702-26",
        "https://security.gentoo.org/glsa/201710-20",
        "https://www.nagios.org/projects/nagios-core/history/4x/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1402869",
        "https://github.com/NagiosEnterprises/nagioscore/commit/c29557dec91eba2306f5fb11b8da4474ba63f8c4",
        "https://legalhackers.com/advisories/Nagios-Exploit-Root-PrivEsc-CVE-2016-9566.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-9566",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 380020,
  "published_at": "2016-12-15T22:59:00.537+00:00"
}