XML External Entity injection in Palo Alto PAN-OS - CVE-2021-3055
Published: September 8, 2021
Vulnerability identifier: #VU56406
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-3055
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input. A remote authenticated administrator can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
Affected software
Palo Alto PAN-OS
How to mitigate CVE-2021-3055
Install updates from vendor's website.
Palo Alto PAN-OS - addressed in versions 8.1.20, 9.0.14, 9.1.10, 10.0.6