Security advisory

{
  "id": "e52a779d00589ecfdb6f33d3a6a85eebf019ea6e29c1d17b21e4f0afd1d6dc47",
  "url": "https://osv.dev/vulnerability/CVE-2017-16943",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2017-16943",
    "summary": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.",
    "evidence": "osv:CVE-2017-16943",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2017-16943",
      "aliases": [
        "CVE-2017-16943"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/exim/exim",
              "type": "GIT",
              "events": [
                {
                  "introduced": "57091745e6d5ce4259c645b3ac63838668d55b7f"
                },
                {
                  "last_affected": "38903fb5b864ee99904d035337c66891604d9678"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:exim:exim:4.88:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.88-NA"
                      },
                      {
                        "last_affected": "4.88-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "cpe": "cpe:2.3:a:exim:exim:4.89:-:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.89-NA"
                      },
                      {
                        "last_affected": "4.89-NA"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.88-NA",
            "4.89-NA",
            "exim-4_89",
            "exim-4_89_RC7",
            "exim-4_89_RC6",
            "exim-4_89_RC5",
            "exim-4_89_RC4",
            "exim-4_89_RC3",
            "exim-4_89_RC1",
            "exim-4_88"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-16943.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:16.983857169Z",
      "provider": "osv",
      "references": [
        "https://www.debian.org/security/2017/dsa-4053",
        "https://bugs.exim.org/show_bug.cgi?id=2199",
        "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde",
        "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4",
        "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html",
        "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2017-16943",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429458,
  "published_at": "2017-11-25T17:29:00.26+00:00"
}