CVE-2021-3056 PAN-OS: Memory Corruption Vulnerability in GlobalProtect Clientless VPN During SAML Authentication

High 8.8 Published 10 Nov 2021 Updated 16 Sep 2024

An authenticated attacker can execute arbitrary code with root privileges via memory corruption in GlobalProtect Clientless VPN during SAML authentication.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-3056?

CVE-2021-3056 is a high-severity memory corruption vulnerability in Paloaltonetworks Pan-Os, published on 10 Nov 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A memory corruption vulnerability in Palo Alto Networks PAN-OS GlobalProtect Clientless VPN enables an authenticated attacker to execute arbitrary code with root user privileges during SAML authentication. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1. Prisma Access customers with Prisma Access 2.1 Preferred firewalls are impacted by this issue.

Weakness: CWE-787, CWE-120

Which versions are affected by CVE-2021-3056?

It affects 1 product.

Products include Paloaltonetworks Pan-Os.

How do I fix CVE-2021-3056?

No fix has been published for CVE-2021-3056 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-3056 being exploited?

There is no known exploitation of CVE-2021-3056 in the wild and no public exploit code.

All Paloaltonetworks Pan-Os vulnerabilities

Sources

Also known as GHSA-63p7-57p8-xrww.