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

6.5MEDIUM

Key Information:

Vendor

Palo Alto Networks
Status
Pan-os
Vendor
CVE Published:
8 September 2021

Badges

👾 Exploit Exists

What is CVE-2021-3055?

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.

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Affected Version(s)

PAN-OS 9.0 < 9.0.14

PAN-OS 9.1 < 9.1.10

PAN-OS 10.0 < 10.0.6

References

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

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

This issue was found by a customer of Palo Alto Networks during a security review.
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