CVE-2020-2000 in PAN-OS
Summary
by MITRE • 11/12/2020
An OS command injection and memory corruption vulnerability in the PAN-OS management web interface that allows authenticated administrators to disrupt system processes and potentially execute arbitrary code and OS commands with root privileges. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.16; PAN-OS 9.0 versions earlier than PAN-OS 9.0.10; PAN-OS 9.1 versions earlier than PAN-OS 9.1.4; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.
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Analysis
by VulDB Data Team • 12/05/2020
The vulnerability described in CVE-2020-2000 represents a critical security flaw within the Palo Alto Networks PAN-OS management web interface that demonstrates the dangerous intersection of command injection and memory corruption vulnerabilities. This issue affects multiple major versions of the PAN-OS operating system, creating a widespread impact across enterprise network security infrastructure. The vulnerability specifically targets authenticated administrators who possess legitimate access credentials, making it particularly concerning as it exploits legitimate user privileges to escalate to root-level system control. The flaw exists within the web interface management components that handle administrative requests, creating a pathway for malicious actions that can disrupt system processes and potentially enable full system compromise. The vulnerability's presence in versions prior to the specified patched releases indicates that this weakness was present for an extended period, allowing attackers with administrative access to exploit the flaw for unauthorized system manipulation.
The technical implementation of this vulnerability involves a combination of OS command injection mechanisms and memory corruption flaws that work together to create a powerful attack vector. When an authenticated administrator interacts with the affected web interface components, the system fails to properly validate or sanitize input parameters that are subsequently passed to underlying operating system commands. This improper input handling creates opportunities for attackers to inject malicious commands that execute with elevated privileges. The memory corruption aspect suggests that the vulnerability may involve buffer overflows or similar memory handling errors that can be leveraged to manipulate program execution flow. The combination of these two vulnerability types creates a particularly dangerous scenario where an attacker can not only execute arbitrary commands but potentially gain deeper control over system memory management and process execution. According to CWE classification, this vulnerability aligns with CWE-78 for OS command injection and potentially CWE-121 for buffer overflow conditions, demonstrating the multi-faceted nature of the security weakness.
The operational impact of CVE-2020-2000 extends far beyond simple system disruption, as it provides attackers with the capability to execute arbitrary code with root privileges on affected PAN-OS systems. This level of access enables complete compromise of the network security appliance, potentially allowing attackers to modify firewall rules, access network traffic, exfiltrate sensitive data, or establish persistent backdoors within the network infrastructure. The vulnerability affects the core management interface that administrators rely upon for system configuration and monitoring, making it a critical target for attackers seeking to gain unauthorized control over enterprise security controls. Organizations running affected PAN-OS versions face significant risk of data breaches, network infiltration, and complete loss of control over their firewall infrastructure. The disruption of system processes mentioned in the vulnerability description indicates that attackers could potentially cause denial of service conditions while simultaneously executing malicious commands, creating a dual threat to both availability and confidentiality of network security services.
Mitigation strategies for CVE-2020-2000 should focus on immediate patching of affected PAN-OS versions to the recommended patched releases including PAN-OS 8.1.16, 9.0.10, 9.1.4, and 10.0.1. Organizations should prioritize updating their PAN-OS systems to prevent exploitation of this vulnerability, as the attack vector requires only authenticated administrative access to be effective. Network segmentation and access control measures should be implemented to limit the number of administrative accounts with access to the management interface, reducing the potential attack surface. Monitoring for unusual administrative activity and command execution patterns within the management interface should be enhanced to detect potential exploitation attempts. Security teams should also implement proper input validation and sanitization measures at the application level to prevent similar vulnerabilities from being introduced in custom applications or web interfaces. According to ATT&CK framework, this vulnerability maps to T1059 for command and scripting interpreter and T1068 for exploit for privilege escalation, indicating the attack patterns that security teams should monitor for in their defensive operations. Regular security assessments and vulnerability scanning should be conducted to identify any remaining unpatched systems within the organization's infrastructure.