XXE in Palo Alto PAN-OS



Published: 2021-09-08
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-3055
CWE-ID CWE-611
Exploitation vector Network
Public exploit N/A
Vulnerable software
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Palo Alto PAN-OS
Operating systems & Components / Operating system

Vendor Palo Alto Networks, Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) XML External Entity injection

EUVDB-ID: #VU56406

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2021-3055

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 10.0.0 - 10.0.5, 9.1 - 9.1.9, 9.0 - 9.0.13, 8.1 - 8.1.19


CPE2.3 External links

http://security.paloaltonetworks.com/CVE-2021-3055

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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