Home/CVE/An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS softwa
CVE

CVE-2020-2050

An authentication bypass vulnerability exists in the GlobalProtect SSL VPN component of Palo Alto Networks PAN-OS softwa

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. Impacted features that use SSL VPN with client certificate verification are: GlobalProtect Gateway, GlobalProtect Portal, GlobalProtect Clientless VPN In 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. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.17.

PAN-OS 9.0 versions earlier than PAN-OS 9.0.11.

PAN-OS 9.1 versions earlier than PAN-OS 9.1.5.

PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.

HIGH · CVSS 8.2 EPSS 0.0016
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-285Improper Authorization
CWE-287Improper Authentication
▤

Affected Products & Versions

4
paloaltonetworks pan-os>= 8.1.0 and < 8.1.17
paloaltonetworks pan-os>= 9.0.0 and < 9.0.11
paloaltonetworks pan-os>= 9.1.0 and < 9.1.5
paloaltonetworks pan-os>= 10.0.0 and < 10.0.1
▣

Scoring & Timeline

8.2
HIGH · CVSS v3.1 · psirt@paloaltonetworks.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Nov 2020 · 12:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://security.paloaltonetworks.com/CVE-2020-2050Vendor Advisory
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