#VU28966 Improper Certificate Validation in GlobalProtect Agent - CVE-2020-2033

Vulnerability identifier: #VU28966

Vulnerability risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-2033

CWE-ID: CWE-295

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
GlobalProtect Agent
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor: Palo Alto Networks, Inc.

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to a missing certification validation, when the pre-logon feature is enabled. A remote attacker on the local network can perform a MitM attack, disclose the pre-logon authentication cookie and access the GlobalProtect Server as allowed by configured Security rules for the "pre-login" user.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

GlobalProtect Agent: 5.0.0 - 5.1.3

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External links
https://security.paloaltonetworks.com/CVE-2020-2033

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.