CVE-2020-2006 in PAN-OS
Summary
by MITRE
A stack-based buffer overflow vulnerability in the management server component of PAN-OS that allows an authenticated user to potentially execute arbitrary code with root privileges. This issue affects: All versions of PAN-OS 7.1 and 8.0; PAN-OS 8.1 versions earlier than 8.1.14.
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Analysis
by VulDB Data Team • 10/17/2020
The vulnerability identified as CVE-2020-2006 represents a critical stack-based buffer overflow within the management server component of Palo Alto Networks PAN-OS operating systems. This flaw exists in the software's handling of specific input parameters during authentication and administrative operations, creating a pathway for malicious actors to exploit the system's memory management mechanisms. The vulnerability specifically targets the way the management server processes user-supplied data, leading to potential memory corruption that can be leveraged for privilege escalation.
The technical implementation of this buffer overflow stems from inadequate input validation and bounds checking within the management server's code execution flow. When an authenticated user submits specially crafted input to the management interface, the system fails to properly validate the length of the provided data before copying it into a fixed-size stack buffer. This fundamental flaw allows attackers to overwrite adjacent memory locations, potentially including return addresses and control data structures. The vulnerability is particularly dangerous because it requires only authentication credentials to exploit, meaning that an attacker with valid user access can leverage this flaw to gain root-level privileges on the affected system.
The operational impact of CVE-2020-2006 extends beyond simple code execution, as it enables complete system compromise through privilege escalation. Once an attacker successfully exploits this vulnerability, they can execute arbitrary code with the highest level of system privileges, effectively gaining full control over the PAN-OS device. This includes the ability to modify firewall rules, access sensitive network data, establish backdoors, and potentially use the compromised device as a pivot point for further attacks within the network infrastructure. The attack surface is particularly concerning for organizations relying on Palo Alto firewalls for network security, as these devices often serve as critical gateways protecting entire network perimeters.
Organizations affected by this vulnerability should immediately implement mitigation strategies focusing on both immediate patching and operational security improvements. The primary remediation involves upgrading to PAN-OS versions 8.1.14 or later, which contain the necessary code modifications to prevent the buffer overflow condition. Additionally, network administrators should consider implementing additional monitoring for suspicious authentication patterns and unusual management server activity. From a cybersecurity framework perspective, this vulnerability aligns with CWE-121 Stack-based Buffer Overflow and maps to attack techniques described in the MITRE ATT&CK framework under privilege escalation and execution categories. Organizations should also review their access control policies to ensure that only necessary personnel have management access to critical network infrastructure, reducing the potential attack surface for such authenticated exploits.