Security restrictions bypass in Palo Alto Network PAN-OS

Published: 2020-11-12
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-1999
Exploitation vector Network
Public exploit N/A
Vulnerable software
Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Check for Unusual or Exceptional Conditions

EUVDB-ID: #VU48409

Risk: Medium


CVE-ID: CVE-2020-1999

CWE-ID: CWE-754 - Improper Check for Unusual or Exceptional Conditions

Exploit availability: No


The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrect processing of exceptional conditions in the PAN-OS signature-based threat detection engine. A remote non-authenticated attacker can communicate with devices in the network in a way that is not analyzed for threats by sending data through specifically crafted TCP packets.


Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 9.1 - 9.1.4, 9.0 - 9.0.10, 8.1 - 8.1.16, 8.0 - 8.0.21, 7.1 - 7.1.26

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?