CVE-2020-2033: GlobalProtect App: Missing certificate validation vulnerability can disclose pre-logon authentication cookie
First published: Wed Jun 10 2020(Updated: )
When the pre-logon feature is enabled, a missing certification validation in Palo Alto Networks GlobalProtect app can disclose the pre-logon authentication cookie to a man-in-the-middle attacker on the same local area network segment with the ability to manipulate ARP or to conduct ARP spoofing attacks. This allows the attacker to access the GlobalProtect Server as allowed by configured Security rules for the 'pre-login' user. This access may be limited compared to the network access of regular users. This issue affects: GlobalProtect app 5.0 versions earlier than GlobalProtect app 5.0.10 when the prelogon feature is enabled; GlobalProtect app 5.1 versions earlier than GlobalProtect app 5.1.4 when the prelogon feature is enabled.
Credit: psirt@paloaltonetworks.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Paloaltonetworks Globalprotect | >=5.0.0<5.0.10 | |
| Paloaltonetworks Globalprotect | >=5.1.0<5.1.4 |
Remedy
This issue is fixed in GlobalProtect app 5.0.10, GlobalProtect app 5.1.4, and all later GlobalProtect app versions.
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Reference Links
Frequently Asked Questions
What is CVE-2020-2033?
CVE-2020-2033 is a vulnerability in Palo Alto Networks GlobalProtect app that can disclose the pre-logon authentication cookie to a man-in-the-middle attacker on the same local area network segment.
How does CVE-2020-2033 affect Palo Alto Networks GlobalProtect?
When the pre-logon feature is enabled, the vulnerability in Palo Alto Networks GlobalProtect app can expose the pre-logon authentication cookie to a nearby attacker with the ability to manipulate ARP or conduct ARP spoofing attacks.
What is the severity of CVE-2020-2033?
CVE-2020-2033 has a severity rating of 5.3 (medium).
Which versions of Palo Alto Networks GlobalProtect are affected by CVE-2020-2033?
Palo Alto Networks GlobalProtect versions 5.0.0 to 5.0.10 and versions 5.1.0 to 5.1.4 are affected by CVE-2020-2033.
How can I fix CVE-2020-2033?
To fix CVE-2020-2033, upgrade to a version of Palo Alto Networks GlobalProtect that is not affected by this vulnerability, such as version 5.1.5 or higher.
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