CVEvulnerability

CVE-2021-3055

6.5 MEDIUM Published 2021-09-08 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-09-08
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
CVSS 3.1 ([email protected])
6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:S/C:P/I:N/A:C
Weaknesses
CWE-611

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.

Affected configurations

• 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)

Related

Weakness · CWE (1)

  • CWE-611 Improper Restriction of XML External Entity Reference weakness

References