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

Published Nov 10, 2021
·
Updated

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.

Affected Software

4 affected components
Palo Alto Networks PAN-OS>=8.1.0<8.1.20
Palo Alto Networks PAN-OS>=9.0.0<9.0.14
Palo Alto Networks PAN-OS>=9.1.0<9.1.9
Palo Alto Networks PAN-OS=10.0.0

Remediation

Information

This issue is fixed in PAN-OS 8.1.20, PAN-OS 9.0.14, PAN-OS 9.1.9, PAN-OS 10.0.1, and all later PAN-OS versions. This issue is fixed in Prisma Access 2.2 Preferred and all later Prisma Access versions.

Event History

Nov 10, 2021
CVE Published
via MITRE·05:10 PM
Data Sourced
via MITRE·05:10 PM
RemedyDescriptionSeverityWeakness

Frequently Asked Questions

1

What is CVE-2021-3056?

CVE-2021-3056 is a memory corruption vulnerability in Palo Alto Networks PAN-OS GlobalProtect Clientless VPN.

2

How does CVE-2021-3056 impact PAN-OS?

CVE-2021-3056 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; and PAN-OS 10.0.0.

3

What is the severity of CVE-2021-3056?

CVE-2021-3056 has a severity score of 8.8, which is classified as high.

4

How can an attacker exploit CVE-2021-3056?

An authenticated attacker can exploit CVE-2021-3056 during SAML authentication to execute arbitrary code with root user privileges.

5

How to mitigate CVE-2021-3056?

To mitigate CVE-2021-3056, upgrade PAN-OS to version 8.1.20 or later, 9.0.14 or later, 9.1.9 or later, or 10.0.0.

Company

Resources

Contact

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