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Home > Cybersecurity > Zero day discovered in Palo Alto security appliance

Zero day discovered in Palo Alto security appliance

Randori cybersecurity researchers discovered a zero day vulnerability, which affects PAN firewalls using the GlobalProtect Portal VPN.


Atalay Kelestemur Atalay Kelestemur
November 12, 2021
1 min read
Zero day discovered in Palo Alto security appliance

Security researchers at cybersecurity company Randori discovered a zero-day flaw in GlobalProtect VPN. There are around 10,000 servers running this product already. The flaw allows the attackers to execute remote code on the vulnerable product installations.

Affecting multiple versions

The flaw is tracked as CVE-2021-3064, affecting PAN firewalls using the GlobalProtect Portal VPN. The flaw is a buffer overflow, which occurs while parsing user input into a fixed length and affects multiple versions of PAN-OS 8.1 before 8.1.17. For exploiting the vulnerability, the attacker must have network access to the device on the GlobalProtect service port – the default port is 443 – that is often accessible over the internet.

Randori researchers said, « Our team was able to gain a shell on the affected target, access sensitive configuration data, extract credentials, and more. Once an attacker has control over the firewall, they will have visibility into the internal network and can proceed to move laterally. Randori researchers have not exploited the buffer overflow to result in controlled code execution on certain hardware device versions with MIPS-based management plane CPUs due to their big-endian architecture, though the overflow is reachable on these devices and can be exploited to limit the availability of services. »

If you are using Palo Alto Networks security appliance and GlobalProtect Portal VPN is running on your systems, we highly recommend you to update it to the latest, fixed & stable version.

See more Cybersecurity News


Tags: Palo Alto Networks
Atalay Kelestemur

Atalay Kelestemur

Atalay Kelestemur is the Editor-in-Chief of Cloud7 News. Also, he is the Program Manager of AlmaLinux OS, an open-source, community-driven Linux operating system. He was most recently the chief editor of T3. Prior to that, he was the managing editor of BYTE. He also served as a software editor in PC World. Atalay Kelestemur has covered the technology industry since 1996, publishing articles in PC Net, IT Pro, Computer World, PC Life, CyberMag, and CIO magazines. Atalay Kelestemur is an information system security professional and his area of expertise includes Linux security, penetration testing, secure software development, malware removal, and computer forensics. Atalay Kelestemur is the author of Pardus 2011, Ubuntu, Windows 8, and Siber Istihbarat (Cyber Intelligence). Atalay graduated with a Bachelor's Degree in Maritime from Istanbul Technical University. He earned a master's degree in political science from Gedik University, where he wrote his thesis on The Importance of Cyber Intelligence on Public Security. Now he is working on his Ph.D. thesis on international trade, covering the cybersecurity threats and countermeasures on the maritime industry.

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