SAML authentication bypass in PAN-OS

1) SAML authenticated bypass

EUVDB-ID: #VU29387

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 - Improper Authentication

Exploit availability: Yes

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 - 9.1.2

CPE2.3

• cpe:2.3:o:palo_alto_networks:pan-os:7.1:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.0:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.3:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.4:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.4-h2:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.5:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.6:*:*:*:*:*:*:*
• cpe:2.3:o:palo_alto_networks:pan-os:7.1.7:*:*:*:*:*:*:*

External links

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

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.