PT-2021-18771 · Palo Alto Networks · Pan-Os

Cristian Mocanu + 1 · Published 2021-09-08 · Updated 2021-09-15 · CVE-2021-3055

Positive Technologies (AI Summary)

CVSS v2.0

7.5

High

Base vector

AV:N/AC:L/Au:S/C:P/I:N/A:C

Name of the Vulnerable Software and Affected Versions PAN-OS versions prior to 8.1.20 PAN-OS versions prior to 9.0.14 PAN-OS versions prior to 9.1.10 PAN-OS versions prior to 10.0.6

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.

Recommendations For PAN-OS versions prior to 8.1.20, update to version 8.1.20 or later. For PAN-OS versions prior to 9.0.14, update to version 9.0.14 or later. For PAN-OS versions prior to 9.1.10, update to version 9.1.10 or later. For PAN-OS versions prior to 10.0.6, update to version 10.0.6 or later.

Fix

DoS

XXE

Weakness Enumeration

CWE-611

Related Identifiers

CVE-2021-3055

Affected Products

Pan-Os

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-3055 · Security Note
• https://security.paloaltonetworks.com/CVE-2021-3055 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-3055 · Vendor Advisory
• https://t.me/cibsecurity/28513 · Telegram Post