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AUSCERT External Security Bulletin Redistribution
GlobalProtect Clientless VPN session hijacking
14 May 2020
AusCERT Security Bulletin Summary
Product: GlobalProtect Clientless VPN
Publisher: Palo Alto
Operating System: Network Appliance
Impact/Access: Cross-site Scripting -- Remote with User Interaction
CVE Names: CVE-2020-2005
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Palo Alto Networks Security Advisories / CVE-2020-2005
CVE-2020-2005 PAN-OS: GlobalProtect Clientless VPN session hijacking
Severity 7.1 . HIGH
Attack Vector NETWORK
Attack Complexity LOW
Privileges Required NONE
User Interaction REQUIRED
Confidentiality Impact HIGH
Integrity Impact LOW
Availability Impact NONE
A cross-site scripting (XSS) vulnerability exists when visiting malicious
websites with the Palo Alto Networks GlobalProtect Clientless VPN that can
compromise the user's active session.
This issue affects:
PAN-OS 7.1 versions earlier than 7.1.26;
All versions of PAN-OS 8.0;
PAN-OS 8.1 versions earlier than 8.1.13;
PAN-OS 9.0 versions earlier than 9.0.7.
Versions Affected Unaffected
9.0 < 9.0.7 >= 9.0.7
8.1 < 8.1.13 >= 8.1.13
7.1 < 7.1.26 >= 7.1.26
This issue only affects firewalls configured with GlobalProtect Clientless VPN.
CVSSv3.1 Base Score: 7.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)
This issue is fixed in PAN-OS 8.0.21, PAN-OS 7.1.26, PAN-OS 8.1.13, PAN-OS
9.0.7, and all later versions of PAN-OS.
PAN-OS 8.0 is now end-of-life as of October 31, 2019, and is no longer covered
by our Product Security Assurance policies.
Workarounds and Mitigations
Configure GlobalProtect Clientless VPN to only access known trusted websites,
and block access all other websites.
This issue was discovered by Ron Masas of Palo Alto Networks during internal
2020-05-13 Initial publication
Policy Report vulnerabilitiesManage subscriptions
(C) 2020 Palo Alto Networks, Inc. All rights reserved.
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