{"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: Authentication bypass vulnerability in GlobalProtect client certificate verification"}],"publisher":{"category":"vendor","name":"Palo Alto Networks","namespace":"https://security.paloaltonetworks.com"},"title":"Palo Alto Networks PSIRT provided VEX document: CVE-2020-2050","distribution":{"text":"Copyright © 2024 Palo Alto Networks. All rights reserved.","tlp":{"label":"CLEAR","url":"https://www.first.org/tlp/"}},"tracking":{"current_release_date":"2026-03-11T22:30:41.847Z","generator":{"date":"2026-03-11T22:30:41.847Z","engine":{"name":"Vulnogram","version":"0.0.9"}},"id":"CVE-2020-2050","initial_release_date":"2020-11-11T17:00:00.000Z","revision_history":[{"number":"1","date":"2020-11-11T09:00:00.000Z","summary":"Initial publication"},{"number":"2","date":"2020-11-12T16:42:00.000Z","summary":"New workaround is available."},{"number":"3","date":"2020-11-19T13:00:00.000Z","summary":"Updated to mention LSVPN and IPSec based VPN is not affected."}],"status":"final","version":"1"}},"product_tree":{"branches":[{"name":"Palo Alto Networks","category":"vendor","branches":[]}]},"vulnerabilities":[{"cve":"CVE-2020-2050","product_status":{"fixed":["PANW-PAN-OS-282","PANW-PAN-OS-319","PANW-PAN-OS-314","PANW-PAN-OS-292"],"known_affected":["PANW-PAN-OS-282","PANW-PAN-OS-319","PANW-PAN-OS-314","PANW-PAN-OS-292"]},"notes":[{"category":"description","text":"An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication.\n\nImpacted features that use SSL VPN with client certificate verification are:\n  GlobalProtect Gateway,\n  GlobalProtect Portal,\n  GlobalProtect Clientless VPN,\n  GlobalProtect Large Scale VPN\n\nIn configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue."}],"references":[{"category":"external","summary":"NVD - CVE-2020-2050","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-2050"},{"category":"self","summary":"Palo Alto Networks Security Advisory CVE-2020-2050","url":"https://security.paloaltonetworks.com/CVE-2020-2050"}],"threats":[{"category":"impact","description":"An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS software that allows an attacker to bypass all client certificate checks with an invalid certificate. A remote attacker can successfully authenticate as any user and gain access to restricted VPN network resources when the gateway or portal is configured to rely entirely on certificate-based authentication.\n\nImpacted features that use SSL VPN with client certificate verification are:\n  GlobalProtect Gateway,\n  GlobalProtect Portal,\n  GlobalProtect Clientless VPN,\n  GlobalProtect Large Scale VPN\n\nIn configurations where client certificate verification is used in conjunction with other authentication methods, the protections added by the certificate check are ignored as a result of this issue."}],"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":8.2,"baseSeverity":"HIGH"},"products":["PANW-PAN-OS-282","PANW-PAN-OS-319","PANW-PAN-OS-314","PANW-PAN-OS-292"]}]}]}