title: PAN-OS: Memory Corruption Vulnerability in GlobalProtect Clientless VPN During SAML Authentication
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.
problem types: CWE-120 Buffer Overflow
affected:
{
product: PAN-OS
vendor: Palo Alto Networks
versions:
status: unaffected, version: 10.1.*
changes: [at: 9.0.14, status: unaffected], lessThan: 9.0.14, status: affected, version: 9.0, versionType: custom
changes: [at: 8.1.20, status: unaffected], lessThan: 8.1.20, status: affected, version: 8.1, versionType: custom
changes: [at: 9.1.9, status: unaffected], lessThan: 9.1.9, status: affected, version: 9.1, versionType: custom
changes: [at: 10.0.1, status: unaffected], lessThan: 10.0.1, status: affected, version: 10.0, versionType: custom
}
{
product: Prisma Access
vendor: Palo Alto Networks
versions:
status: unaffected, version: 2.2 all
status: affected, version: 2.1 Preferred
status: unaffected, version: 2.1 Innovation
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
exploits: Palo Alto Networks is not aware of any malicious exploitation of this issue.
solutions: 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.
workarounds: Enable signatures for Unique Threat ID 91585 on traffic processed by the firewall to block attacks against CVE-2021-3056.