What is CVE-2021-3056?

CVE-2021-3056 is a high-severity vulnerability in Palo Alto Networks Pan-Os, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-11-10.

How severe is CVE-2021-3056?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Palo Alto Networks Pan-Os

CVE-2021-3056

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.

Vulnerability class: Buffer Overflow

EPSS: 0.015 (71.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Palo Alto Networks Pan-os — versions 10.1.*, 9.0, 8.1
Palo Alto Networks Prisma Access — versions 2.2 all, 2.1 Preferred, 2.1 Innovation
Paloaltonetworks Pan-os — versions 10.0.0

Weakness classification (CWE)

References

psirt@paloaltonetworks.com (x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-3056?: CVE-2021-3056 is a high-severity vulnerability in Palo Alto Networks Pan-Os, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.8/10. Published 2021-11-10.
How severe is CVE-2021-3056?: High severity. CVSS v3 base score is 8.8 out of 10.