{"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: Denial-of-Service (DoS) Vulnerability in GlobalProtect Portal and Gateway Interfaces"}],"publisher":{"category":"vendor","name":"Palo Alto Networks","namespace":"https://security.paloaltonetworks.com"},"title":"Palo Alto Networks PSIRT provided VEX document: CVE-2021-3063","distribution":{"text":"Copyright © 2024 Palo Alto Networks. All rights reserved.","tlp":{"label":"CLEAR","url":"https://www.first.org/tlp/"}},"tracking":{"current_release_date":"2026-03-11T22:31:30.417Z","generator":{"date":"2026-03-11T22:31:30.417Z","engine":{"name":"Vulnogram","version":"0.0.9"}},"id":"CVE-2021-3063","initial_release_date":"2021-11-10T17:00:00.000Z","revision_history":[{"number":"1","date":"2021-11-10T09:00:00.000Z","summary":"Initial publication"},{"number":"2","date":"2021-11-10T18:00:00.000Z","summary":"PAN-OS 10.0.8-h4 is now available"},{"number":"3","date":"2021-12-09T09:16:00.000Z","summary":"Fixed the discovery status as this was internally found."}],"status":"final","version":"1"}},"product_tree":{"branches":[{"name":"Palo Alto Networks","category":"vendor","branches":[]}]},"vulnerabilities":[{"cve":"CVE-2021-3063","product_status":{"fixed":["PANW-PAN-OS-273","PANW-PAN-OS-283","PANW-PAN-OS-284","PANW-PAN-OS-234","PANW-PAN-OS-285"],"known_affected":["PANW-PAN-OS-273","PANW-PAN-OS-283","PANW-PAN-OS-284","PANW-PAN-OS-234","PANW-PAN-OS-285"],"known_not_affected":["PANW-Prisma-Access-18","PANW-Prisma-Access-19"]},"notes":[{"category":"description","text":"An improper handling of exceptional conditions vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to send specifically crafted traffic to a GlobalProtect interface that causes the service to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode."}],"references":[{"category":"external","summary":"NVD - CVE-2021-3063","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3063"},{"category":"self","summary":"Palo Alto Networks Security Advisory CVE-2021-3063","url":"https://security.paloaltonetworks.com/CVE-2021-3063"}],"threats":[{"category":"impact","description":"An improper handling of exceptional conditions vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to send specifically crafted traffic to a GlobalProtect interface that causes the service to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode."}],"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"products":["PANW-PAN-OS-273","PANW-PAN-OS-283","PANW-PAN-OS-284","PANW-PAN-OS-234","PANW-PAN-OS-285"]}]}]}