Vulnerability in Palo Alto Networks Pan-Os
CVE-2021-3053
An improper handling of exceptional conditions vulnerability exists in the Palo Alto Networks PAN-OS dataplane that enables an unauthenticated network-based attacker to send specifically crafted traffic through the firewall that causes the service to crash. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. 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 10.0.5. This issue does not affect Prisma Access.
EPSS: 0.010 (59.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Palo Alto Networks Pan-os — versions 10.1.*, 8.1, 9.0
- Paloaltonetworks Pan-os
Weakness classification (CWE)
References
- psirt@paloaltonetworks.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-3053?
- CVE-2021-3053 is a high-severity vulnerability in Palo Alto Networks Pan-Os, classified under Improper Handling of Exceptional Conditions. CVSS score: 7.5/10. Published 2021-09-08.
- How severe is CVE-2021-3053?
- High severity. CVSS v3 base score is 7.5 out of 10.