{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.97.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "5a8fc079931410b30889e69f890857b05ca8d4b2"
            }
          ],
          "repo": "https://github.com/exim/exim",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.",
  "id": "CVE-2024-39929",
  "modified": "2026-04-01T23:08:33.616816648Z",
  "published": "2024-07-04T15:15:10.323Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.rfc-editor.org/rfc/rfc2231.txt"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Exim/exim/compare/exim-4.98-RC2...exim-4.98-RC3"
    },
    {
      "type": "FIX",
      "url": "https://git.exim.org/exim.git/commit/1b3209b0577a9327ebb076f3b32b8a159c253f7b"
    },
    {
      "type": "FIX",
      "url": "https://git.exim.org/exim.git/commit/6ce5c70cff8989418e05d01fd2a57703007a6357"
    },
    {
      "type": "EVIDENCE",
      "url": "https://bugs.exim.org/show_bug.cgi?id=3099#c4"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}