CVE-2020-7263 in ENS
Summary
by MITRE
Improper access control vulnerability in ESConfigTool.exe in ENS for Windows all current versions allows a local administrator to alter the ENS configuration up to and including disabling all protection offered by ENS via insecurely implemented encryption of configuration for export and import.
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Analysis
by VulDB Data Team • 05/13/2024
The vulnerability identified as CVE-2020-7263 represents a critical improper access control flaw within the ESConfigTool.exe component of ENS for Windows products. This issue affects all current versions of the software and stems from insecure implementation of encryption mechanisms used for configuration export and import operations. The vulnerability specifically targets local administrator accounts, which creates a significant security risk as these users typically possess elevated privileges within the system. The flaw allows an authenticated local administrator to manipulate the Endpoint Security configuration in ways that can completely disable all protective features offered by the ENS solution. This represents a fundamental failure in the principle of least privilege and privilege separation within the security architecture.
The technical implementation of the encryption mechanism used by ESConfigTool.exe fails to properly validate or authenticate configuration data during import operations. When configuration data is exported, it appears to be encrypted using a method that does not adequately protect against tampering or unauthorized modification. This insecure encryption implementation creates a pathway for a local administrator to modify exported configuration files and then re-import them with altered settings that can disable critical security protections. The vulnerability essentially allows for privilege escalation within the context of the ENS configuration management system, where a user with local administrative access can effectively bypass the intended security controls of the endpoint protection solution.
The operational impact of this vulnerability extends beyond simple configuration changes as it can render the entire Endpoint Security solution ineffective. When an attacker with local administrator access modifies the configuration to disable protection features, they essentially create a backdoor that allows for persistent access to the compromised system while bypassing all security monitoring and protection mechanisms. This vulnerability undermines the core purpose of endpoint security solutions and creates an environment where malicious actors can operate undetected. The attack vector is particularly concerning as it requires only local administrative privileges, which are often more accessible than remote attack vectors and can be obtained through various means such as credential theft or social engineering attacks. This vulnerability aligns with CWE-284, which addresses improper access control, and can be mapped to ATT&CK technique T1059 for execution and T1566 for credential access, demonstrating how the vulnerability can be exploited as part of a broader attack chain.
Mitigation strategies for CVE-2020-7263 should focus on immediate implementation of additional access controls and monitoring mechanisms. Organizations should implement strict segregation of duties and ensure that local administrative privileges are not granted to users who do not require them for their operational tasks. The configuration management process should be reviewed to ensure that exported configuration files are properly validated before import operations, and that cryptographic signatures are implemented to verify the integrity of configuration data. System administrators should also implement continuous monitoring of configuration changes and establish automated alerts for any modifications to critical security settings. Additionally, organizations should consider implementing application whitelisting policies that restrict execution of ESConfigTool.exe to authorized users only, and regular security assessments should be conducted to identify any unauthorized access to system configuration files. The vulnerability highlights the importance of secure configuration management practices and demonstrates how weak encryption implementations can compromise entire security architectures.