Vulnerability Description
An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the file system and send a specifically crafted request to 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 9.1.10; PAN-OS 10.0 versions earlier than PAN-OS 10.0.6. This issue does not affect Prisma Access.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Paloaltonetworks | Pan-Os | >= 8.1.0, < 8.1.20 |
Related Weaknesses (CWE)
References
- https://security.paloaltonetworks.com/CVE-2021-3055Vendor Advisory
- https://security.paloaltonetworks.com/CVE-2021-3055Vendor Advisory
FAQ
What is CVE-2021-3055?
CVE-2021-3055 is a vulnerability with a CVSS score of 6.5 (MEDIUM). An improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface enables an authenticated administrator to read any arbitrary file from the f...
How severe is CVE-2021-3055?
CVE-2021-3055 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-3055?
Check the references section above for vendor advisories and patch information. Affected products include: Paloaltonetworks Pan-Os.