{"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: Invalid URLs in an External Dynamic List (EDL) can Lead to Firewall Outage"}],"publisher":{"category":"vendor","name":"Palo Alto Networks","namespace":"https://security.paloaltonetworks.com"},"title":"Palo Alto Networks PSIRT provided VEX document: CVE-2021-3048","distribution":{"text":"Copyright © 2024 Palo Alto Networks. All rights reserved.","tlp":{"label":"CLEAR","url":"https://www.first.org/tlp/"}},"tracking":{"current_release_date":"2026-03-11T22:39:00.390Z","generator":{"date":"2026-03-11T22:39:00.390Z","engine":{"name":"Vulnogram","version":"0.0.9"}},"id":"CVE-2021-3048","initial_release_date":"2021-08-11T16:00:00.000Z","revision_history":[{"number":"1","date":"2021-08-11T09:00:00.000Z","summary":"Initial publication"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"name":"Palo Alto Networks","category":"vendor","branches":[]}]},"vulnerabilities":[{"cve":"CVE-2021-3048","product_status":{"fixed":["PANW-PAN-OS-290","PANW-PAN-OS-291","PANW-PAN-OS-297"],"known_affected":["PANW-PAN-OS-290","PANW-PAN-OS-291","PANW-PAN-OS-297"],"known_not_affected":["PANW-PAN-OS-271","PANW-PAN-OS-276"]},"notes":[{"category":"description","text":"Certain invalid URL entries contained in an External Dynamic List (EDL) cause the Device Server daemon (devsrvr) to stop responding.\n\nThis condition causes subsequent commits on the firewall to fail and prevents administrators from performing commits and configuration changes even though the firewall remains otherwise functional. If the firewall then restarts, it results in a denial-of-service (DoS) condition and the firewall stops processing traffic."}],"references":[{"category":"external","summary":"NVD - CVE-2021-3048","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-3048"},{"category":"self","summary":"Palo Alto Networks Security Advisory CVE-2021-3048","url":"https://security.paloaltonetworks.com/CVE-2021-3048"}],"threats":[{"category":"impact","description":"Certain invalid URL entries contained in an External Dynamic List (EDL) cause the Device Server daemon (devsrvr) to stop responding.\n\nThis condition causes subsequent commits on the firewall to fail and prevents administrators from performing commits and configuration changes even though the firewall remains otherwise functional. If the firewall then restarts, it results in a denial-of-service (DoS) condition and the firewall stops processing traffic."}],"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM"},"products":["PANW-PAN-OS-290","PANW-PAN-OS-291","PANW-PAN-OS-297"]}]}]}