CVE-2021-3056: PAN-OS: Memory Corruption Vulnerability in GlobalProtect Clientless VPN During SAML Authentication
First published: Wed 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.
Credit: psirt@paloaltonetworks.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Paloaltonetworks Pan-os | >=8.1.0<8.1.20 | |
| Paloaltonetworks Pan-os | >=9.0.0<9.0.14 | |
| Paloaltonetworks Pan-os | >=9.1.0<9.1.9 | |
| Paloaltonetworks Pan-os | =10.0.0 |
Remedy
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.
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Reference Links
Frequently Asked Questions
What is CVE-2021-3056?
CVE-2021-3056 is a memory corruption vulnerability in Palo Alto Networks PAN-OS GlobalProtect Clientless VPN.
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.
What is the severity of CVE-2021-3056?
CVE-2021-3056 has a severity score of 8.8, which is classified as high.
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.
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.
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- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/author
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- vendor/paloaltonetworks
- canonical/paloaltonetworks pan-os
- version/paloaltonetworks pan-os/8.1.0
- version/paloaltonetworks pan-os/9.0.0
- version/paloaltonetworks pan-os/9.1.0
- version/paloaltonetworks pan-os/10.0.0