CVE-2021-3055

published 2021-09-08

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…

Priority P3 37 medium 6.5 CVSS 3.1

AV N AC L PR H UI N S U C H I N A H

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

9 ranges

Vendor	Product	Version range	Fixed in
palo_alto_networks	pan-os	>= 10.0 < 10.0.6	10.0.6
palo_alto_networks	pan-os	>= 8.1 < 8.1.20	8.1.20
palo_alto_networks	pan-os	>= 9.0 < 9.0.14	9.0.14
palo_alto_networks	pan-os	>= 9.1 < 9.1.10	9.1.10
paloalto	pan-os	—	—
paloaltonetworks	pan-os	>= 10.0.0 < 10.0.6	10.0.6
paloaltonetworks	pan-os	>= 8.1.0 < 8.1.20	8.1.20
paloaltonetworks	pan-os	>= 9.0.0 < 9.0.14	9.0.14
paloaltonetworks	pan-os	>= 9.1.0 < 9.1.10	9.1.10

CVSS provenance

nvd v3.1 6.5 MEDIUM CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

nvd v2.0 7.5 HIGH AV:N/AC:L/Au:S/C:P/I:N/A:C

Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.

CWE-611