CVE-2018-4037 in CleanMyMac X
Summary
by MITRE
The CleanMyMac X software contains an exploitable privilege escalation vulnerability due to improper input validation. An attacker with local access can use this vulnerability to modify the file system as root.
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Analysis
by VulDB Data Team • 06/26/2023
The vulnerability identified as CVE-2018-4037 affects CleanMyMac X software and represents a critical privilege escalation flaw that stems from inadequate input validation mechanisms within the application. This vulnerability exists in the software's handling of user inputs and system interactions, creating a pathway for malicious actors to gain elevated privileges beyond their initial access level. The flaw specifically manifests in how the application processes certain inputs, failing to properly validate or sanitize data before executing system-level operations that should only be permitted with root-level permissions.
The technical nature of this vulnerability places it firmly within the realm of privilege escalation attacks, where an attacker with local system access can leverage the flawed input validation to execute arbitrary code with root privileges. This occurs because the CleanMyMac X application does not adequately verify or sanitize inputs that are passed to system functions, allowing crafted malicious input to bypass normal access controls. The vulnerability enables attackers to modify the file system as root, effectively granting them complete control over the system's core operations and data integrity. This type of flaw typically falls under CWE-20, which represents "Improper Input Validation" and is commonly exploited in privilege escalation scenarios.
From an operational perspective, this vulnerability presents a significant risk to systems running CleanMyMac X software, particularly in environments where local user access is not strictly controlled or monitored. The impact extends beyond simple file system modifications to encompass complete system compromise, as attackers can leverage this privilege escalation to install persistent backdoors, modify system binaries, or access sensitive data. The vulnerability's exploitation requires only local access, making it particularly dangerous in shared or unsecured environments where users may have legitimate access to the system but could potentially abuse this privilege escalation to gain root access.
The attack vector for CVE-2018-4037 aligns with ATT&CK technique T1068, which covers "Exploitation for Privilege Escalation," and demonstrates how local system access can be leveraged to achieve elevated privileges through software flaws. This vulnerability also relates to T1059, "Command and Scripting Interpreter," as attackers may use the elevated privileges to execute additional malicious commands or scripts. Organizations should consider this vulnerability as part of broader security assessments, particularly in environments where third-party maintenance software is installed. The flaw represents a classic example of how seemingly benign input handling can create critical security weaknesses that undermine system integrity and user trust.
Mitigation strategies for this vulnerability primarily involve updating to the patched version of CleanMyMac X software, as the vendor has addressed the input validation issues in subsequent releases. System administrators should implement strict access controls and monitor for unauthorized local access to prevent exploitation attempts. Additional protective measures include regular security audits of installed software, particularly maintenance and optimization tools, and implementing application whitelisting policies to limit which applications can execute with elevated privileges. The vulnerability underscores the importance of proper input validation in security-critical applications and serves as a reminder that even seemingly benign software can contain flaws that enable complete system compromise when exploited correctly.