#VU27896 Improper Authentication in Palo Alto PAN-OS - CVE-2020-2002

Vulnerability identifier: #VU27896

Vulnerability risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-2002

CWE-ID: CWE-287

Exploitation vector: Local network

Exploit availability: No

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 the authentication daemon and User-ID components of Palo Alto Networks PAN-OS by failing to verify the integrity of the Kerberos key distribution center (KDC) before authenticating users. This affects all forms of authentication that use a Kerberos authentication profile. A man-in-the-middle type of attacker with the ability to intercept communication between PAN-OS and KDC can login to PAN-OS as an administrator.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 7.1.0 - 7.1.25, 8.0.0 - 8.0.21, 8.1.0 - 8.1.12, 9.0.0 - 9.0.5

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External links
https://security.paloaltonetworks.com/CVE-2020-2002

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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.