Buffer overflow in PAN-OS GlobalProtect Clientless VPN



Published: 2021-11-11
Risk Critical
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2021-3056
CWE-ID CWE-119
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 critical risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU58111

Risk: Critical

CVSSv3.1:

CVE-ID: CVE-2021-3056

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the PAN-OS GlobalProtect Clientless VPN during SAML authentication. A remote attacker can send specially crafted request to the system, trigger memory corruption and execute arbitrary code with root privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Palo Alto PAN-OS: 10.0.0, 9.1 - 9.1.8, 9.0 - 9.0.13, 8.1 - 8.1.19


CPE2.3 External links

http://security.paloaltonetworks.com/CVE-2021-3056

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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