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CVE-2015-5965

Status: ModifiedMedium (5)—

The SSL-VPN feature in Fortinet FortiOS before 4.3.13 only checks the first byte of the TLS MAC in finished messages, which makes it easier for remote attackers to spoof encrypted content via a crafted MAC field.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Fortinet — Fortios

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2015-5965",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2015-08-11T14:59:16.477",
  "references": [
    {
      "url": "http://www.fortiguard.com/advisory/FG-IR-15-016/",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/76065",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1033256",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/201508-01",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://vivaldi.net/en-US/blogs/entry/the-poodle-has-friends",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.fortiguard.com/advisory/FG-IR-15-016/",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "http://www.securitytracker.com/id/1033256",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
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    {
      "url": "https://security.gentoo.org/glsa/201508-01",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
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      "url": "https://vivaldi.net/en-US/blogs/entry/the-poodle-has-friends",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The SSL-VPN feature in Fortinet FortiOS before 4.3.13 only checks the first byte of the TLS MAC in finished messages, which makes it easier for remote attackers to spoof encrypted content via a crafted MAC field."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad en la funciionalidad SSL-VPN en Fortinet FortiOS en versiones anteriores a 4.3.13, sólo comprueba el primer byte de la TLS MAC en los mensajes finalizados, lo que hace que sea más fácil para atacantes remotos suplantar el contenido cifrado a través de un campo MAC manipulado."
    }
  ],
  "lastModified": "2026-06-17T00:30:12.030",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "F4A9AD38-4005-4B33-AB47-5E81F9AB5E32",
              "versionEndIncluding": "4.3.12"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}