CVE-2020-2002

PAN-OS: Spoofed Kerberos key distribution center authentication bypass

HIGH
8.1
CVSS Score
Published: May 13, 2020 at 07:07 PM UTC
Updated: June 17, 2026 at 03:11 AM UTC
1 product affected across 1 vendorPAN-OS

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Severity
HIGH8.1
Exploit prediction
EPSS 1%

Description

An authentication bypass by spoofing vulnerability exists in 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. This issue affects: PAN-OS 7.1 versions earlier than 7.1.26; PAN-OS 8.1 versions earlier than 8.1.13; PAN-OS 9.0 versions earlier than 9.0.6; All version of PAN-OS 8.0.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.1 ≤ v < 7.1.267.1.0 ≤ v < 7.1.268.0.0 ≤ v ≤ 8.0.208.1 ≤ v < 8.1.138.1.0 ≤ v < 8.1.139.0 ≤ v < 9.0.69.0.0 ≤ v < 9.0.67.18.0.*8.19.0
Affected range stops below 7.1.26, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.1.13, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.0.6, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (1)

CVSS

8.1HIGHpalo_alto
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-290

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