Vulnerability-Lookup

FKIE_CVE-2020-2040

Vulnerability from fkie_nvd - Published: 2020-09-09 17:15 - Updated: 2026-06-17 03:11

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

A buffer overflow vulnerability in PAN-OS allows an unauthenticated attacker to disrupt system processes and potentially execute arbitrary code with root privileges by sending a malicious request to the Captive Portal or Multi-Factor Authentication interface. This issue impacts: All versions of PAN-OS 8.0; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 9.1 versions earlier than PAN-OS 9.1.3.

References

	URL	Tags
	psirt@paloaltonetworks.com	https://security.paloaltonetworks.com/CVE-2020-2040	Vendor Advisory
	af854a3a-2127-422b-91ae-364da2661108	https://security.paloaltonetworks.com/CVE-2020-2040	Vendor Advisory

Impacted products

Vendor	Product	Version
paloaltonetworks	pan-os	*
paloaltonetworks	pan-os	*
paloaltonetworks	pan-os	*
paloaltonetworks	pan-os	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "PAN-OS",
          "vendor": "Palo Alto Networks",
          "versions": [
            {
              "status": "affected",
              "version": "8.0.*"
            },
            {
              "changes": [
                {
                  "at": "9.0.9",
                  "status": "unaffected"
                }
              ],
              "lessThan": "9.0.9",
              "status": "affected",
              "version": "9.0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "9.1.3",
                  "status": "unaffected"
                }
              ],
              "lessThan": "9.1.3",
              "status": "affected",
              "version": "9.1",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "8.1.15",
                  "status": "unaffected"
                }
              ],
              "lessThan": "8.1.15",
              "status": "affected",
              "version": "8.1",
              "versionType": "custom"
            },
            {
              "lessThan": "10.0*",
              "status": "unaffected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "psirt@paloaltonetworks.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2BEFBF38-AF84-4477-A6B9-5BDD51D54F4F",
              "versionEndIncluding": "8.0.20",
              "versionStartIncluding": "8.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6116C706-6AC7-476D-9624-C0D4BE3D497A",
              "versionEndExcluding": "8.1.15",
              "versionStartIncluding": "8.1.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6D6E8B99-4150-4AE8-A580-08AC71F64760",
              "versionEndExcluding": "9.0.9",
              "versionStartIncluding": "9.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4E9F14E9-3CD7-443B-9D97-254E917FA22B",
              "versionEndExcluding": "9.1.3",
              "versionStartIncluding": "9.1.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A buffer overflow vulnerability in PAN-OS allows an unauthenticated attacker to disrupt system processes and potentially execute arbitrary code with root privileges by sending a malicious request to the Captive Portal or Multi-Factor Authentication interface. This issue impacts: All versions of PAN-OS 8.0; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 9.1 versions earlier than PAN-OS 9.1.3."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de desbordamiento de b\u00fafer en PAN-OS permite a un atacante no autenticado interrumpir los procesos del sistema y potencialmente ejecutar c\u00f3digo arbitrario con privilegios root al enviar una petici\u00f3n maliciosa al portal cautivo o la interfaz de autenticaci\u00f3n multifactor. Este problema impacta a: todas las Versiones PAN-OS 8.0; Versiones PAN-OS 8.1 anteriores a PAN-OS 8.1.15; Versiones PAN-OS 9.0 anteriores a PAN-OS 9.0.9; Versiones PAN-OS 9.1 anteriores a PAN-OS 9.1.3."
    }
  ],
  "id": "CVE-2020-2040",
  "lastModified": "2026-06-17T03:11:42.043",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "psirt@paloaltonetworks.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2020-09-09T17:15:25.900",
  "references": [
    {
      "source": "psirt@paloaltonetworks.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://security.paloaltonetworks.com/CVE-2020-2040"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://security.paloaltonetworks.com/CVE-2020-2040"
    }
  ],
  "sourceIdentifier": "psirt@paloaltonetworks.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "psirt@paloaltonetworks.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-120"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2020-2040 (GCVE-0-2020-2040)

Vulnerability from cvelistv5 – Published: 2020-09-09 16:45 – Updated: 2024-09-16 22:40

Title

PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled

Summary

Severity

9.8 (Critical)


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

CWE

CWE-120 - Buffer Overflow

Assigner

palo_alto mitre root

References

1 reference

URL	Tags
https://security.paloaltonetworks.com/CVE-2020-2040	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
Palo Alto Networks	PAN-OS	Affected: 8.0.* Affected: 9.0 , < 9.0.9 (custom) Affected: 9.1 , < 9.1.3 (custom) Affected: 8.1 , < 8.1.15 (custom) Unaffected: 10.0.0 , < 10.0* (custom)

Date Public

2020-09-09 00:00

Credits

This issue was found by Yamata Li of Palo Alto Networks during internal security review.

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T06:54:00.636Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://security.paloaltonetworks.com/CVE-2020-2040"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "PAN-OS",
          "vendor": "Palo Alto Networks",
          "versions": [
            {
              "status": "affected",
              "version": "8.0.*"
            },
            {
              "changes": [
                {
                  "at": "9.0.9",
                  "status": "unaffected"
                }
              ],
              "lessThan": "9.0.9",
              "status": "affected",
              "version": "9.0",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "9.1.3",
                  "status": "unaffected"
                }
              ],
              "lessThan": "9.1.3",
              "status": "affected",
              "version": "9.1",
              "versionType": "custom"
            },
            {
              "changes": [
                {
                  "at": "8.1.15",
                  "status": "unaffected"
                }
              ],
              "lessThan": "8.1.15",
              "status": "affected",
              "version": "8.1",
              "versionType": "custom"
            },
            {
              "lessThan": "10.0*",
              "status": "unaffected",
              "version": "10.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "This issue is applicable only where either Captive Portal or Multi-Factor Authentication (MFA) is enabled."
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "This issue was found by Yamata Li of Palo Alto Networks during internal security review."
        }
      ],
      "datePublic": "2020-09-09T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "A buffer overflow vulnerability in PAN-OS allows an unauthenticated attacker to disrupt system processes and potentially execute arbitrary code with root privileges by sending a malicious request to the Captive Portal or Multi-Factor Authentication interface. This issue impacts: All versions of PAN-OS 8.0; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; PAN-OS 9.1 versions earlier than PAN-OS 9.1.3."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-120",
              "description": "CWE-120 Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2020-09-09T16:45:27.000Z",
        "orgId": "d6c1279f-00f6-4ef7-9217-f89ffe703ec0",
        "shortName": "palo_alto"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://security.paloaltonetworks.com/CVE-2020-2040"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "This issue is fixed in PAN-OS 8.1.15, PAN-OS 9.0.9, PAN-OS 9.1.3, and all later PAN-OS versions.\n\nAll Prisma Access services are now upgraded to resolve this issue and are no longer vulnerable.\n\nPAN-OS 7.1 and 8.0 are end-of-life and are no longer covered by our Product Security Assurance policies."
        }
      ],
      "source": {
        "defect": [
          "PAN-145149",
          "PAN-145150",
          "PAN-145151",
          "PAN-145195"
        ],
        "discovery": "INTERNAL"
      },
      "timeline": [
        {
          "lang": "en",
          "time": "2020-09-09T00:00:00.000Z",
          "value": "Initial publication"
        }
      ],
      "title": "PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled",
      "workarounds": [
        {
          "lang": "en",
          "value": "Until PAN-OS software is upgraded to a fixed version, enabling signatures in content update version 8317 will block attacks against CVE-2020-2040."
        }
      ],
      "x_generator": {
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      },
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          "ASSIGNER": "psirt@paloaltonetworks.com",
          "DATE_PUBLIC": "2020-09-09T16:00:00.000Z",
          "ID": "CVE-2020-2040",
          "STATE": "PUBLIC",
          "TITLE": "PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "PAN-OS",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "\u003c",
                            "version_name": "9.0",
                            "version_value": "9.0.9"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "9.1",
                            "version_value": "9.1.3"
                          },
                          {
                            "version_affected": "\u003c",
                            "version_name": "8.1",
                            "version_value": "8.1.15"
                          },
                          {
                            "version_affected": "!\u003e=",
                            "version_name": "9.0",
                            "version_value": "9.0.9"
                          },
                          {
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                            "version_value": "9.1.3"
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                          {
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                          {
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                "vendor_name": "Palo Alto Networks"
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            ]
          }
        },
        "configuration": [
          {
            "lang": "en",
            "value": "This issue is applicable only where either Captive Portal or Multi-Factor Authentication (MFA) is enabled."
          }
        ],
        "credit": [
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            "lang": "eng",
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              "refsource": "MISC",
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            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "This issue is fixed in PAN-OS 8.1.15, PAN-OS 9.0.9, PAN-OS 9.1.3, and all later PAN-OS versions.\n\nAll Prisma Access services are now upgraded to resolve this issue and are no longer vulnerable.\n\nPAN-OS 7.1 and 8.0 are end-of-life and are no longer covered by our Product Security Assurance policies."
          }
        ],
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            "PAN-145195"
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          }
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    "datePublished": "2020-09-09T16:45:27.805Z",
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    "dateUpdated": "2024-09-16T22:40:15.121Z",
    "state": "PUBLISHED"
  },
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}

Sightings

Author	Source	Type	Date	Other

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.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2020-2040

CVE-2020-2040 (GCVE-0-2020-2040)

Tags

Sightings

Nomenclature

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