CVE-2023-38046 in PAN-OS
Summary
by MITRE • 07/12/2023
A vulnerability exists in Palo Alto Networks PAN-OS software that enables an authenticated administrator with the privilege to commit a specifically created configuration to read local files and resources from the system.
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Analysis
by VulDB Data Team • 08/02/2023
This vulnerability in Palo Alto Networks PAN-OS software represents a critical privilege escalation and information disclosure risk that exploits a flaw in the configuration commit process. The vulnerability allows an authenticated administrator with specific privileges to manipulate the system's configuration handling mechanisms to access local files and resources that should normally be restricted. This presents a significant security risk as it enables unauthorized data access through legitimate administrative functions. The flaw specifically manifests during the commit operation when the system processes certain configuration elements that fail to properly validate or sanitize file access requests. According to CWE-22, this vulnerability falls under path traversal or directory traversal attacks where the system fails to properly restrict access to local resources during configuration operations. The issue is particularly concerning because it leverages legitimate administrative privileges to bypass normal access controls, making it difficult to detect through standard monitoring mechanisms.
The technical implementation of this vulnerability involves the manipulation of configuration commit sequences where the PAN-OS software fails to properly validate file paths or resource access requests during the commit process. When an administrator with appropriate privileges executes a specially crafted configuration commit, the system processes the request without adequate input validation, potentially allowing access to sensitive local files including system configuration files, logs, or other administrative resources. This behavior aligns with ATT&CK technique T1078.004 which covers valid accounts with administrative privileges being used to access system resources. The vulnerability operates at the application level within the PAN-OS operating system, specifically targeting the configuration management subsystem where the commit functionality is implemented. The flaw essentially creates a path traversal condition within the configuration processing logic, allowing for arbitrary file access through configuration operations rather than direct system calls.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more severe attacks including system compromise and data exfiltration. An attacker with access to an administrator account could leverage this vulnerability to access sensitive system information such as configuration files that may contain encryption keys, credentials, or other confidential data. The vulnerability affects the integrity and confidentiality of the PAN-OS system by allowing unauthorized access to local resources through legitimate administrative functions. This creates a significant risk for organizations relying on PAN-OS for network security, as it undermines the trust model of administrative access controls. The vulnerability could be exploited to gather intelligence about the system configuration, potentially revealing network topology, security policies, or other sensitive information that could aid in subsequent attacks. Organizations may experience compliance violations and security breaches if this vulnerability is exploited to access restricted system resources.
Organizations should implement immediate mitigations including applying the latest security patches provided by Palo Alto Networks to address this vulnerability. The recommended approach involves updating to PAN-OS versions that contain fixes for the configuration commit processing logic and proper input validation mechanisms. Network administrators should also implement strict monitoring of configuration commit activities and establish baseline behaviors for normal administrative operations to detect anomalous patterns that might indicate exploitation attempts. Access controls should be reviewed and enforced to ensure that only necessary personnel have the ability to commit configuration changes. The implementation of principle of least privilege should be strictly enforced, limiting administrative privileges to only those users who require them for their specific duties. Additionally, organizations should conduct regular security assessments of their PAN-OS implementations to identify potential misconfigurations or unauthorized access patterns that could be exploited to leverage this vulnerability. System logging should be enhanced to capture detailed information about configuration changes and file access attempts to facilitate forensic analysis if exploitation occurs. The vulnerability demonstrates the importance of validating all user inputs within system operations and highlights the need for robust access control mechanisms even within trusted administrative functions.