CVE-2023-39393 in EMUI
Summary
by MITRE • 08/13/2023
Vulnerability of insecure signatures in the ServiceWifiResources module. Successful exploitation of this vulnerability may cause ServiceWifiResources to be maliciously modified and overwritten.
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Analysis
by VulDB Data Team • 09/08/2023
The vulnerability identified as CVE-2023-39393 represents a critical security flaw within the ServiceWifiResources module that resides in Android-based systems. This issue stems from inadequate signature verification mechanisms that fail to properly validate the authenticity of software components. The ServiceWifiResources module is responsible for managing wireless network services and configurations, making it a prime target for attackers seeking to compromise network security. The vulnerability specifically affects the integrity verification processes that should ensure only legitimate and authorized modifications can be applied to the module.
The technical root cause of this vulnerability lies in the insufficient cryptographic signature validation implemented within the ServiceWifiResources component. When the system attempts to update or modify the module, it fails to properly verify digital signatures that should confirm the software's authenticity and integrity. This weakness creates an opportunity for malicious actors to inject unauthorized code or modify existing functionality without detection. The flaw essentially allows attackers to bypass security controls that are designed to prevent unauthorized modifications to critical system components. According to CWE classification, this vulnerability maps to CWE-311, which addresses the absence of proper cryptographic protection of sensitive data, and CWE-312, concerning the exposure of sensitive information through cleartext storage or transmission.
The operational impact of this vulnerability extends beyond simple code modification, as it fundamentally undermines the trust model that governs Android system security. Attackers who successfully exploit this weakness can potentially gain persistent access to wireless network configurations, modify authentication parameters, or even establish backdoor access points. The consequences include unauthorized network access, data interception, and potential lateral movement within networked environments. This vulnerability aligns with ATT&CK technique T1552.001, which covers unsecured credentials, and T1059.001, involving command and scripting interpreter usage, as attackers can leverage modified services to execute malicious payloads. The compromised module could enable attackers to manipulate wireless network settings, potentially redirecting traffic through malicious gateways or disabling security features.
Mitigation strategies for CVE-2023-39393 require immediate attention through proper patch management and system updates from vendors. Organizations should implement comprehensive monitoring for unauthorized modifications to system resources and establish robust integrity verification processes. Security teams must ensure that all software components undergo proper signature verification before deployment, utilizing strong cryptographic algorithms and maintaining secure key management practices. The vulnerability highlights the importance of maintaining strong software integrity controls and implementing defense-in-depth strategies. Regular security audits should verify that signature validation mechanisms are functioning correctly and that no unauthorized modifications have occurred. Additionally, system administrators should consider implementing network segmentation and monitoring to detect anomalous behavior that might indicate exploitation attempts. The remediation process should include verifying the integrity of all ServiceWifiResources components and ensuring that proper access controls are enforced to prevent unauthorized modification attempts.