cvelistv5 - CVE-2020-12820

CVE-2020-12820 (GCVE-0-2020-12820)

Vulnerability from cvelistv5 – Published: 2024-12-19 10:57 – Updated: 2024-12-20 17:25

Summary

Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon (fcnacd) and potentially execute arbitrary code via requesting a large FortiClient file name. We are not aware of proof of concept code successfully achieving the latter.

Severity ?

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:U/RL:X/RC:X

CWE

CWE-121 - Execute unauthorized code or commands

Assigner

fortinet

References

URL

Tags

https://fortiguard.fortinet.com/psirt/FG-IR-20-083

Impacted products

	Vendor	Product	Version
	Fortinet	FortiOS	Affected: 6.0.0 , ≤ 6.0.10 (semver) Affected: 5.6.0 , ≤ 5.6.12 (semver) cpe:2.3:o:fortinet:fortios:6.0.10:::::::* cpe:2.3:o:fortinet:fortios:6.0.9:::::::* cpe:2.3:o:fortinet:fortios:6.0.8:::::::* cpe:2.3:o:fortinet:fortios:6.0.7:::::::* cpe:2.3:o:fortinet:fortios:6.0.6:::::::* cpe:2.3:o:fortinet:fortios:6.0.5:::::::* cpe:2.3:o:fortinet:fortios:6.0.4:::::::* cpe:2.3:o:fortinet:fortios:6.0.3:::::::* cpe:2.3:o:fortinet:fortios:6.0.2:::::::* cpe:2.3:o:fortinet:fortios:6.0.1:::::::* cpe:2.3:o:fortinet:fortios:6.0.0:::::::* cpe:2.3:o:fortinet:fortios:5.6.12:::::::* cpe:2.3:o:fortinet:fortios:5.6.11:::::::* cpe:2.3:o:fortinet:fortios:5.6.10:::::::* cpe:2.3:o:fortinet:fortios:5.6.9:::::::* cpe:2.3:o:fortinet:fortios:5.6.8:::::::* cpe:2.3:o:fortinet:fortios:5.6.7:::::::* cpe:2.3:o:fortinet:fortios:5.6.6:::::::* cpe:2.3:o:fortinet:fortios:5.6.5:::::::* cpe:2.3:o:fortinet:fortios:5.6.4:::::::* cpe:2.3:o:fortinet:fortios:5.6.3:::::::* cpe:2.3:o:fortinet:fortios:5.6.2:::::::* cpe:2.3:o:fortinet:fortios:5.6.1:::::::* cpe:2.3:o:fortinet:fortios:5.6.0:::::::*

Show details on NVD website

JSON

To clipboard

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            "confidentialityImpact": "NONE",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
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      "id": "CVE-2020-12820",
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    "vulnrichment": {
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}

GSD-2020-12820

Vulnerability from gsd - Updated: 2023-12-13 01:21

Details

** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.

Aliases

CVE-2020-12820

Aliases

CVE-2020-12820

JSON

To clipboard

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  "GSD": {
    "alias": "CVE-2020-12820",
    "id": "GSD-2020-12820"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-12820"
      ],
      "id": "GSD-2020-12820",
      "modified": "2023-12-13T01:21:49.458739Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
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      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2020-12820",
        "STATE": "RESERVED"
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      "data_type": "CVE",
      "data_version": "4.0",
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            "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
          }
        ]
      }
    }
  }
}

CERTFR-2020-AVI-606

Vulnerability from certfr_avis - Published: - Updated:

De multiples vulnérabilités ont été découvertes dans Fortinet FortiOS. Elles permettent à un attaquant authentifié et connecté via un tunnel SSL VPN de provoquer une exécution de code arbitraire à distance et un déni de service à distance.

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

Vendor	Product	Description
Fortinet	FortiOS	FortiOS 6.2.x version antérieures à 6.2.5
Fortinet	FortiOS	FortiOS 6.4.x version antérieures à 6.4.2
Fortinet	FortiOS	FortiOS 5.6.x version antérieures à 5.6.13
Fortinet	FortiOS	FortiOS 6.0.x version antérieures à 6.0.11

References

Title

Publication Time

Tags

Bulletin de sécurité Fortinet FG-IR-20-083 du 24 septembre 2020	None	vendor-advisory
Bulletin de sécurité Fortinet FG-IR-20-082 du 24 septembre 2020	None	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "FortiOS 6.2.x version ant\u00e9rieures \u00e0 6.2.5",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    },
    {
      "description": "FortiOS 6.4.x version ant\u00e9rieures \u00e0 6.4.2",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    },
    {
      "description": "FortiOS 5.6.x version ant\u00e9rieures \u00e0 5.6.13",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    },
    {
      "description": "FortiOS 6.0.x version ant\u00e9rieures \u00e0 6.0.11",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": null,
  "content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
  "cves": [
    {
      "name": "CVE-2020-12820",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12820"
    },
    {
      "name": "CVE-2020-12819",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12819"
    }
  ],
  "links": [],
  "reference": "CERTFR-2020-AVI-606",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2020-09-25T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Fortinet FortiOS.\nElles permettent \u00e0 un attaquant authentifi\u00e9 et connect\u00e9 via un tunnel\nSSL VPN de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance et un\nd\u00e9ni de service \u00e0 distance.\n",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Fortinet FortiOS",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Fortinet FG-IR-20-083 du 24 septembre 2020",
      "url": "https://www.fortiguard.com/psirt/FG-IR-20-083"
    },
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Fortinet FG-IR-20-082 du 24 septembre 2020",
      "url": "https://www.fortiguard.com/psirt/FG-IR-20-082"
    }
  ]
}

CERTFR-2020-AVI-606

Vulnerability from certfr_avis - Published: - Updated:

Solution

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

None

Impacted products

Vendor	Product	Description
Fortinet	FortiOS	FortiOS 6.2.x version antérieures à 6.2.5
Fortinet	FortiOS	FortiOS 6.4.x version antérieures à 6.4.2
Fortinet	FortiOS	FortiOS 5.6.x version antérieures à 5.6.13
Fortinet	FortiOS	FortiOS 6.0.x version antérieures à 6.0.11

References

Title

Publication Time

Tags

Bulletin de sécurité Fortinet FG-IR-20-083 du 24 septembre 2020	None	vendor-advisory
Bulletin de sécurité Fortinet FG-IR-20-082 du 24 septembre 2020	None	vendor-advisory

Show details on source website

JSON

To clipboard

{
  "$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
  "affected_systems": [
    {
      "description": "FortiOS 6.2.x version ant\u00e9rieures \u00e0 6.2.5",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    },
    {
      "description": "FortiOS 6.4.x version ant\u00e9rieures \u00e0 6.4.2",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    },
    {
      "description": "FortiOS 5.6.x version ant\u00e9rieures \u00e0 5.6.13",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    },
    {
      "description": "FortiOS 6.0.x version ant\u00e9rieures \u00e0 6.0.11",
      "product": {
        "name": "FortiOS",
        "vendor": {
          "name": "Fortinet",
          "scada": false
        }
      }
    }
  ],
  "affected_systems_content": null,
  "content": "## Solution\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des\ncorrectifs (cf. section Documentation).\n",
  "cves": [
    {
      "name": "CVE-2020-12820",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12820"
    },
    {
      "name": "CVE-2020-12819",
      "url": "https://www.cve.org/CVERecord?id=CVE-2020-12819"
    }
  ],
  "links": [],
  "reference": "CERTFR-2020-AVI-606",
  "revisions": [
    {
      "description": "Version initiale",
      "revision_date": "2020-09-25T00:00:00.000000"
    }
  ],
  "risks": [
    {
      "description": "D\u00e9ni de service \u00e0 distance"
    },
    {
      "description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
    }
  ],
  "summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans Fortinet FortiOS.\nElles permettent \u00e0 un attaquant authentifi\u00e9 et connect\u00e9 via un tunnel\nSSL VPN de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance et un\nd\u00e9ni de service \u00e0 distance.\n",
  "title": "Multiples vuln\u00e9rabilit\u00e9s dans Fortinet FortiOS",
  "vendor_advisories": [
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Fortinet FG-IR-20-083 du 24 septembre 2020",
      "url": "https://www.fortiguard.com/psirt/FG-IR-20-083"
    },
    {
      "published_at": null,
      "title": "Bulletin de s\u00e9curit\u00e9 Fortinet FG-IR-20-082 du 24 septembre 2020",
      "url": "https://www.fortiguard.com/psirt/FG-IR-20-082"
    }
  ]
}

FKIE_CVE-2020-12820

Vulnerability from fkie_nvd - Published: 2024-12-19 11:15 - Updated: 2025-01-21 20:42

Severity ?

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
8.8 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	psirt@fortinet.com	https://fortiguard.fortinet.com/psirt/FG-IR-20-083	Vendor Advisory

Impacted products

	Vendor	Product	Version
	fortinet	fortios	*
	fortinet	fortios	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8C8DACBF-C9D5-4898-8294-DB887A28A9C7",
              "versionEndExcluding": "5.6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D44B5E8F-6093-4E84-9197-4530032E5B5A",
              "versionEndExcluding": "6.0.11",
              "versionStartIncluding": "6.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon (fcnacd) and potentially execute arbitrary code via requesting a large FortiClient file name. We are not aware of proof of concept code successfully achieving the latter."
    },
    {
      "lang": "es",
      "value": "En una configuraci\u00f3n no predeterminada, un desbordamiento de b\u00fafer basado en pila en FortiOS versi\u00f3n 6.0.10 y anteriores, versi\u00f3n 5.6.12 y anteriores puede permitir que un atacante remoto autenticado en la VPN SSL bloquee el daemon NAC de FortiClient (fcnacd) y potencialmente ejecute c\u00f3digo arbitrario mediante la solicitud de un nombre de archivo FortiClient grande. No tenemos conocimiento de ning\u00fan c\u00f3digo de prueba de concepto que logre esto \u00faltimo con \u00e9xito."
    }
  ],
  "id": "CVE-2020-12820",
  "lastModified": "2025-01-21T20:42:17.767",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 5.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 2.5,
        "source": "psirt@fortinet.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-12-19T11:15:05.700",
  "references": [
    {
      "source": "psirt@fortinet.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-20-083"
    }
  ],
  "sourceIdentifier": "psirt@fortinet.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "psirt@fortinet.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-8HP7-6MR2-85PV

Vulnerability from github – Published: 2024-12-19 12:32 – Updated: 2024-12-19 12:32

Details

Severity ?

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2020-12820"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121",
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-19T11:15:05Z",
    "severity": "MODERATE"
  },
  "details": "Under non-default configuration, a stack-based buffer overflow in FortiOS version 6.0.10 and below, version 5.6.12 and below may allow a remote attacker authenticated to the SSL VPN to crash the FortiClient NAC daemon (fcnacd) and potentially execute arbitrary code via requesting a large FortiClient file name. We are not aware of proof of concept code successfully achieving the latter.",
  "id": "GHSA-8hp7-6mr2-85pv",
  "modified": "2024-12-19T12:32:40Z",
  "published": "2024-12-19T12:32:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-12820"
    },
    {
      "type": "WEB",
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-20-083"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

Tags

Taxonomy of the tags.

All sightings related to this event Export sightings related to this event

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2020-12820 (GCVE-0-2020-12820)

GSD-2020-12820

CERTFR-2020-AVI-606

Solution

CERTFR-2020-AVI-606

Solution

FKIE_CVE-2020-12820

GHSA-8HP7-6MR2-85PV

Tags

Sightings

Nomenclature