#VU29387 SAML authenticated bypass in Palo Alto PAN-OS - CVE-2020-2021

Vulnerability identifier: #VU29387

Vulnerability risk: High

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2020-2021

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: Yes

Vulnerable software:
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor: Palo Alto Networks, Inc.

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing SAML authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to protected resources.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 7.1 - 7.1.26, 8.0 - 8.0.21, 8.1 - 8.1.14, 9.0.0 - 9.0.8, 9.1.0 - 9.1.2

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External links
https://security.paloaltonetworks.com/CVE-2020-2021

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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 Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.