CVE-2018-4873 in Creative Cloud Desktop Application
Summary
by MITRE
Adobe Creative Cloud Desktop Application versions 4.4.1.298 and earlier have an exploitable Unquoted Search Path vulnerability. Successful exploitation could lead to local privilege escalation.
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Analysis
by VulDB Data Team • 03/14/2023
The Adobe Creative Cloud Desktop Application represents a critical component in the digital workflow ecosystem for creative professionals, serving as the primary interface for managing Adobe's suite of creative applications. This application operates with elevated privileges to perform system-level tasks such as software installation, updates, and configuration management. The vulnerability under examination specifically targets version 4.4.1.298 and earlier releases, where the application fails to properly validate search paths during component loading processes. This flaw creates an exploitable condition that can be leveraged by malicious actors to execute arbitrary code with elevated privileges, fundamentally compromising system security. The vulnerability manifests when the application searches for required libraries or executables in directories that are not properly quoted in the system PATH environment variable.
The technical root cause of this vulnerability stems from improper handling of unquoted search paths within the application's execution environment. When Windows searches for executables, it traverses directories in the PATH variable sequentially and will execute the first matching file it finds. If a directory path contains spaces and is not properly quoted, the system may interpret the path as multiple separate directories, creating opportunities for path traversal attacks. In this specific case, the Adobe Creative Cloud Desktop Application fails to ensure that all PATH entries are properly quoted, allowing attackers to place malicious executables in directories that are searched before legitimate system components. This vulnerability is classified as CWE-428, which specifically addresses the issue of unquoted search paths, and aligns with the broader category of privilege escalation vulnerabilities that fall under the ATT&CK framework's privilege escalation tactics.
The operational impact of this vulnerability extends beyond simple local execution, as successful exploitation can result in complete system compromise through local privilege escalation. Attackers who gain access to a system with this vulnerability can leverage it to elevate their privileges from standard user level to administrator level, enabling them to install malware, modify system files, access sensitive data, and potentially establish persistent backdoors. The vulnerability is particularly concerning because it requires minimal user interaction to exploit, as the Adobe Creative Cloud Desktop Application typically runs with elevated privileges and automatically performs system maintenance tasks. This means that even a casual user who has installed the vulnerable Adobe software could inadvertently provide an attacker with the opportunity to escalate privileges without requiring additional social engineering or complex attack vectors.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term system hardening measures. The primary recommendation involves upgrading to Adobe Creative Cloud Desktop Application version 4.4.2.301 or later, which includes proper handling of quoted search paths and resolves the underlying vulnerability. System administrators should implement comprehensive patch management processes to ensure all vulnerable applications are updated promptly across enterprise environments. Additional protective measures include monitoring system PATH environment variables for unquoted directories, implementing application whitelisting policies, and conducting regular security audits to identify potential path traversal vulnerabilities in other software components. The ATT&CK framework suggests implementing behavioral monitoring to detect suspicious process creation patterns that may indicate exploitation attempts. Organizations should also consider deploying exploit prevention technologies such as Windows Defender Application Control or similar solutions to prevent execution of unauthorized binaries in system directories. Regular security awareness training for users can help prevent accidental exploitation through malicious file downloads or USB drive infections that might target this specific vulnerability.