Palo Alto Networks addresses another high severity issue in PAN-OS devices

July 9, 2020  By Pierluigi Paganini


Palo Alto Networks addressed a new severe vulnerability in the PAN-OS GlobalProtect portal that impacts PAN next-generation firewalls.

Recently Palo Alto Network addressed a critical vulnerability, tracked as CVE-2020-2021, affecting the PAN-OS operating system that powers its next-generation firewall. The flaw could allow unauthenticated network-based attackers to bypass authentication, it has been rated as critical severity and received a CVSS 3.x base score of 10.

Now the security firm addressed an OS command injection vulnerability tracked as CVE-2020-2034 that could allow unauthenticated remote attackers to execute arbitrary OS commands with root privileges on vulnerable devices.

The CVE-2020-2034 flaw can be exploited by attackers with network access to vulnerable servers, it has been rated as high severity and received a CVSS 3.x base score of 8.1.

Experts pointed out that the flaw doesn’t require user interaction to be exploited.

“An OS Command Injection vulnerability in the PAN-OS GlobalProtect portal allows an unauthenticated network-based attacker to execute arbitrary OS commands with root privileges.” reads the advisory published by Palo Alto Networks. “An attacker would require some level of specific information about the configuration of an impacted firewall or perform brute-force attacks to exploit this issue. This issue cannot be exploited if the GlobalProtect portal feature is not enabled.”

At the time it is not clear what information of the firewall are needed to the attackers to exploit the flaw.

The vulnerability can not be exploited only if GlobalProtect portal feature is enabled, Prisma Access services are not impacted by this vulnerability.

This vulnerability affects PAN-OS 9.1 versions earlier than PAN-OS 9.1.3; PAN-OS 8.1 versions earlier than PAN-OS 8.1.15; PAN-OS 9.0 versions earlier than PAN-OS 9.0.9; all versions of PAN-OS 8.0 and PAN-OS 7.1.

The vulnerability was discovered by Yamata Li of Palo Alto Networks Threat Research Team as part of an internal security review.

Palo Alto Networks is not aware of attacks in the wild attempting to exploit this vulnerability.

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Pierluigi Paganini

(SecurityAffairs – hacking, PAN-OS)

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Pierluigi Paganini
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer. Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US. Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines. Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.





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