CVE-2019-5223 in PCManager
Summary
by MITRE
PCManager 9.1.3.1 has an improper authentication vulnerability. The certain driver interface of the software does not perform a validation of user-mode data properly, successful exploit could result in malicious code execution.
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Analysis
by VulDB Data Team • 11/25/2023
The vulnerability identified as CVE-2019-5223 resides within PCManager version 9.1.3.1, a system optimization and maintenance tool that has been found to contain a critical improper authentication flaw. This weakness specifically manifests in the software's driver interface component where user-mode data validation is inadequately implemented, creating a significant security risk that could be exploited by malicious actors to gain unauthorized system access.
The technical flaw stems from insufficient validation mechanisms within the driver interface that processes user-mode data inputs. When the software receives data from user applications or processes, it fails to properly authenticate or validate the legitimacy of this input before processing it within the kernel space. This improper authentication vulnerability creates a pathway for privilege escalation attacks, as malicious code can be injected and executed with elevated privileges typically reserved for system-level operations. The vulnerability aligns with CWE-284, which describes improper access control mechanisms, and represents a classic example of inadequate input validation in kernel-mode components.
The operational impact of this vulnerability extends beyond simple unauthorized access, as successful exploitation could enable attackers to execute arbitrary code with system-level privileges. This capability allows threat actors to bypass standard security controls, install persistent backdoors, modify system files, and potentially establish covert command and control channels. The implications are particularly severe given that PCManager is designed to operate with elevated privileges, making the attack surface even more dangerous. Attackers could leverage this vulnerability to compromise entire systems, steal sensitive data, or use the compromised machine as a launchpad for further network infiltration activities.
Mitigation strategies for CVE-2019-5223 should prioritize immediate software updates from the vendor to address the authentication flaw in the driver interface. Organizations should implement network segmentation to limit access to systems running PCManager and conduct thorough vulnerability assessments to identify potential exploitation attempts. Security monitoring should focus on unusual kernel-mode activity patterns and unauthorized privilege escalation events. Additionally, system administrators should disable unnecessary driver interfaces and implement application whitelisting policies to prevent unauthorized code execution. The vulnerability demonstrates the critical importance of proper input validation in kernel-mode drivers and aligns with ATT&CK technique T1068, which covers the use of privilege escalation techniques through kernel-mode exploitation. Regular security audits of system optimization tools and driver components are essential to prevent similar vulnerabilities from being exploited in the future.