CVE-2021-3056

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

Published Nov 10, 2021 CVSS 3.1 · 8.8 High EPSS 1.5% KEV · Not listed
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.

Remediation

Vendor Solution

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.


Vendor Workaround

Enable signatures for Unique Threat ID 91585 on traffic processed by the firewall to block attacks against CVE-2021-3056.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-26408 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.
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
palo_alto
Published
Updated
Sep 16, 2024, 8:36 PM
Reserved
Jan 6, 2021, 12:00 AM
Status
Modified
Published
Nov 10, 2021, 5:15 PM
Modified
Jun 17, 2026, 4:04 AM