{"document":{"category":"csaf_vex","csaf_version":"2.1","notes":[{"category":"summary","text":"Palo Alto Networks PSIRT provided VEX document. This document is autogenerated.","title":"PAN-OS: Buffer overflow when Captive Portal or Multi-Factor Authentication (MFA) is enabled"}],"publisher":{"category":"vendor","name":"Palo Alto Networks","namespace":"https://security.paloaltonetworks.com"},"title":"Palo Alto Networks PSIRT provided VEX document: CVE-2020-2040","distribution":{"text":"Copyright © 2024 Palo Alto Networks. All rights reserved.","tlp":{"label":"CLEAR","url":"https://www.first.org/tlp/"}},"tracking":{"current_release_date":"2026-04-11T00:25:14.064Z","generator":{"date":"2026-04-11T00:25:14.064Z","engine":{"name":"Vulnogram","version":"0.0.9"}},"id":"CVE-2020-2040","initial_release_date":"2020-09-09T16:00:00.000Z","revision_history":[{"number":"1","date":"2020-09-09T09:00:00.000Z","summary":"Initial publication"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"name":"Palo Alto Networks","category":"vendor","branches":[]}]},"vulnerabilities":[{"cve":"CVE-2020-2040","product_status":{"fixed":["PANW-PAN-OS-324","PANW-PAN-OS-323","PANW-PAN-OS-326"],"known_affected":["PANW-PAN-OS-313","PANW-PAN-OS-324","PANW-PAN-OS-323","PANW-PAN-OS-326"],"known_not_affected":["PANW-PAN-OS-302"]},"notes":[{"category":"description","text":"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.\nThis issue impacts:\nAll versions of PAN-OS 8.0;\nPAN-OS 8.1 versions earlier than PAN-OS 8.1.15;\nPAN-OS 9.0 versions earlier than PAN-OS 9.0.9;\nPAN-OS 9.1 versions earlier than PAN-OS 9.1.3.\n\nThis issue does not impact the GlobalProtect VPN or the PAN-OS management web interfaces."}],"references":[{"category":"external","summary":"NVD - CVE-2020-2040","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2040"},{"category":"self","summary":"Palo Alto Networks Security Advisory CVE-2020-2040","url":"https://security.paloaltonetworks.com/CVE-2020-2040"}],"threats":[{"category":"impact","description":"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.\nThis issue impacts:\nAll versions of PAN-OS 8.0;\nPAN-OS 8.1 versions earlier than PAN-OS 8.1.15;\nPAN-OS 9.0 versions earlier than PAN-OS 9.0.9;\nPAN-OS 9.1 versions earlier than PAN-OS 9.1.3.\n\nThis issue does not impact the GlobalProtect VPN or the PAN-OS management web interfaces."}],"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"products":["PANW-PAN-OS-313","PANW-PAN-OS-324","PANW-PAN-OS-323","PANW-PAN-OS-326"]}]}]}