How does CVE-2021-3055 impact Palo Alto Networks PAN-OS?

CVE-2021-3055 allows an authenticated administrator to read any arbitrary file from the file system and crash the service by sending a specifically crafted request to the firewall.

Which versions of Palo Alto Networks PAN-OS are affected by CVE-2021-3055?

Palo Alto Networks PAN-OS versions 8.1.0 to 8.1.20, 9.0.0 to 9.0.14, 9.1.0 to 9.1.10, and 10.0.0 to 10.0.6 are affected by CVE-2021-3055.

What is the severity of CVE-2021-3055?

CVE-2021-3055 has a severity rating of 6.5, which is considered high.

How can the CVE-2021-3055 vulnerability be fixed?

To fix the CVE-2021-3055 vulnerability, Palo Alto Networks users should upgrade to a version that is not affected by the vulnerability. Please refer to the official Palo Alto Networks security advisory for specific version details.

Vulnerability/
CVE-2021-3055

high

7.5

CWE

611

8/9/2021

17/9/2024

CVE-2021-3055: PAN-OS: XML External Entity (XXE) Reference Vulnerability in the PAN-OS Web Interface

Q: What is CVE-2021-3055?

CVE-2021-3055 is an improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface.

First published: Wed Sep 08 2021(Updated: )

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.

Credit: psirt@paloaltonetworks.com

Affected Software	Affected Version	How to fix
Paloaltonetworks Pan-os	>=8.1.0<8.1.20
Paloaltonetworks Pan-os	>=9.0.0<9.0.14
Paloaltonetworks Pan-os	>=9.1.0<9.1.10
Paloaltonetworks Pan-os	>=10.0.0<10.0.6

Remedy

This issue is fixed in PAN-OS 8.1.20, PAN-OS 9.0.14, PAN-OS 9.1.10, PAN-OS 10.0.6, and all later PAN-OS versions.

Never miss a vulnerability like this again

Reference Links

https://security.paloaltonetworks.com/CVE-2021-3055

Frequently Asked Questions

What is CVE-2021-3055?
CVE-2021-3055 is an improper restriction of XML external entity (XXE) reference vulnerability in the Palo Alto Networks PAN-OS web interface.
How does CVE-2021-3055 impact Palo Alto Networks PAN-OS?
CVE-2021-3055 allows an authenticated administrator to read any arbitrary file from the file system and crash the service by sending a specifically crafted request to the firewall.
Which versions of Palo Alto Networks PAN-OS are affected by CVE-2021-3055?
Palo Alto Networks PAN-OS versions 8.1.0 to 8.1.20, 9.0.0 to 9.0.14, 9.1.0 to 9.1.10, and 10.0.0 to 10.0.6 are affected by CVE-2021-3055.
What is the severity of CVE-2021-3055?
CVE-2021-3055 has a severity rating of 6.5, which is considered high.
How can the CVE-2021-3055 vulnerability be fixed?
To fix the CVE-2021-3055 vulnerability, Palo Alto Networks users should upgrade to a version that is not affected by the vulnerability. Please refer to the official Palo Alto Networks security advisory for specific version details.

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vendor/paloaltonetworks
canonical/paloaltonetworks pan-os
version/paloaltonetworks pan-os/8.1.0
version/paloaltonetworks pan-os/9.0.0
version/paloaltonetworks pan-os/9.1.0
version/paloaltonetworks pan-os/10.0.0

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