Vulnerability · Published Nov 10, 2021 · Assigned by palo_alto

CVE-2021-3056PAN-OS: Memory Corruption Vulnerability in GlobalProtect Clientless VPN During SAML Authentication

High 8.8

In plain English

A high-severity buffer overflow in PAN-OS from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 75% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.5%top 25.0% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Palo Alto Networks	PAN-OS	9.0 – before 9.0.148.1 – before 8.1.209.1 – before 9.1.910.0 – before 10.0.1
Palo Alto Networks	Prisma Access	2.1 Preferred

Weakness: CWE-120 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://security.paloaltonetworks.com/CVE-2021-3056 x_refsource_MISC