CVE-2021-3056

HIGH

Paloaltonetworks Pan-os < 8.1.20 - Out-of-Bounds Write

Title source: rule
STIX 2.1

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.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_misc
https://security.paloaltonetworks.com/CVE-2021-3056

Scores

CVSS v3 8.8
EPSS 0.0075
EPSS Percentile 73.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-120 CWE-787
Status published
Products (2)
paloaltonetworks/pan-os 10.0.0
paloaltonetworks/pan-os 8.1.0 - 8.1.20
Published Nov 10, 2021
Tracked Since Feb 18, 2026