title: PAN-OS: Memory Corruption Vulnerability in GlobalProtect Portal and Gateway Interfaces
description: A memory corruption vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to disrupt system processes and potentially execute arbitrary code with root privileges. The attacker must have network access to the GlobalProtect interface to exploit this issue. This issue impacts PAN-OS 8.1 versions earlier than PAN-OS 8.1.17. Prisma Access customers are not impacted by this issue.
problem types: CWE-121 Stack-based Buffer Overflow
affected:
{
product: PAN-OS
vendor: Palo Alto Networks
versions:
status: unaffected, version: 9.0.*
status: unaffected, version: 9.1.*
status: unaffected, version: 10.0.*
status: unaffected, version: 10.1.*
changes: [at: 8.1.17, status: unaffected], lessThan: 8.1.17, status: affected, version: 8.1, versionType: custom
}
{
product: Prisma Access
vendor: Palo Alto Networks
versions:
status: unaffected, version: 2.2 all
status: unaffected, version: 2.1 all
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 9.8
baseSeverity: CRITICAL
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/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 8.1.17 and all later PAN-OS versions.
workarounds: Enable signatures for Unique Threat IDs 91820 and 91855 on traffic destined for GlobalProtect portal and gateway interfaces to block attacks against CVE-2021-3064.
It is not necessary to enable SSL decryption to detect and block attacks against this issue.