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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.015 (73.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: +0.000
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
- security.paloaltonetworks.com/CVE-2021-3056 (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.