{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.6.50.1"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0b460be9e287fd335c8ce58129c67bf06065ef51"
            },
            {
              "fixed": "9eaa6c2a823c1d2b58913506a15f9474bf857a3d"
            }
          ],
          "repo": "https://github.com/xelerance/openswan",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "In verify_signed_hash() in lib/liboswkeys/signatures.c in Openswan before 2.6.50.1, the RSA implementation does not verify the value of padding string during PKCS#1 v1.5 signature verification. Consequently, a remote attacker can forge signatures when small public exponents are being used. IKEv2 signature verification is affected when RAW RSA keys are used.",
  "id": "CVE-2018-15836",
  "modified": "2026-04-01T23:08:41.527456004Z",
  "published": "2018-09-26T21:29:00.913Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://lists.openswan.org/pipermail/users/2018-August/023761.html"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xelerance/Openswan/commit/9eaa6c2a823c1d2b58913506a15f9474bf857a3d"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xelerance/Openswan/commit/0b460be9e287fd335c8ce58129c67bf06065ef51"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}