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CVE-2023-33307

Status: ModifiedMedium (6.5)—

A null pointer dereference in Fortinet FortiOS before 7.2.5 and before 7.0.11, FortiProxy before 7.2.3 and before 7.0.9 allows attacker to denial of sslvpn service via specifically crafted request in network parameter.

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 (2)

Fortinet — FortiosFortinet — Fortiproxy

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2023-33307",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2023-33307",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-10-22T20:17:52.005676Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "psirt@fortinet.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "psirt@fortinet.com",
      "affectedData": [
        {
          "vendor": "Fortinet",
          "product": "FortiOS",
          "versions": [
            {
              "status": "affected",
              "version": "7.2.0",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.4"
            },
            {
              "status": "affected",
              "version": "7.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.10"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Fortinet",
          "product": "FortiProxy",
          "versions": [
            {
              "status": "affected",
              "version": "7.2.0",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.2"
            },
            {
              "status": "affected",
              "version": "7.0.0",
              "versionType": "semver",
              "lessThanOrEqual": "7.0.8"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2023-06-16T10:15:09.523",
  "references": [
    {
      "url": "https://fortiguard.com/psirt/FG-IR-23-015",
      "tags": [
        "Not Applicable"
      ],
      "source": "psirt@fortinet.com"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/258201",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "nvd@nist.gov"
    },
    {
      "url": "https://fortiguard.com/psirt/FG-IR-23-015",
      "tags": [
        "Not Applicable"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "psirt@fortinet.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A null pointer dereference in Fortinet FortiOS before 7.2.5 and before 7.0.11, FortiProxy before 7.2.3 and before 7.0.9 allows attacker to denial of sslvpn service via specifically crafted request in network parameter."
    }
  ],
  "lastModified": "2026-06-17T06:01:33.147",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "DAC18F7E-5242-4F36-BB42-FEC33B3AC075",
              "versionEndIncluding": "7.0.9",
              "versionStartIncluding": "7.0.0"
            },
            {
              "criteria": "cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "3A99FF48-370E-4D2A-B5CC-889EA21AB213",
              "versionEndIncluding": "7.2.3",
              "versionStartIncluding": "7.2.0"
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8870AB06-C50F-452A-952C-30DE7860264E",
              "versionEndExcluding": "7.0.11",
              "versionStartIncluding": "7.0.0"
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4562BDF7-D894-4CD8-95AC-9409FDEBE73F",
              "versionEndExcluding": "7.2.5",
              "versionStartIncluding": "7.2.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "psirt@fortinet.com"
}