CVE-2019-8071 in Download Manager
Summary
by MITRE
Adobe Download Manager versions 2.0.0.363 have an insecure file permissions vulnerability. Successful exploitation could lead to privilege escalation.
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Analysis
by VulDB Data Team • 10/19/2019
Adobe Download Manager version 2.0.0.363 contains a critical insecure file permissions vulnerability that stems from improper access control mechanisms within the application's file handling processes. This weakness allows malicious actors to manipulate file permissions in a way that could enable unauthorized privilege escalation. The vulnerability manifests when the application creates or modifies files without adequate permission checks, potentially allowing local attackers to gain elevated system privileges. The insecure file permissions issue typically arises from the application's failure to properly implement file system access controls, creating opportunities for privilege escalation attacks. According to CWE classification, this vulnerability maps to CWE-732: Incorrect Permission Assignment for Critical Resource, which specifically addresses situations where applications fail to properly set file permissions for sensitive resources. The flaw represents a fundamental breakdown in the principle of least privilege, where the application grants unnecessary access rights to files that should remain restricted. This vulnerability falls under the ATT&CK technique T1068: Exploitation for Privilege Escalation, as it provides an entry point for attackers to elevate their privileges within the system.
The technical implementation of this vulnerability occurs when Adobe Download Manager creates temporary files or modifies existing system files during the download process. These operations typically occur without proper validation of the target file's existing permissions or without implementing appropriate access control measures. When the application fails to properly set file permissions, it creates opportunities for malicious users to modify or replace critical files with elevated privileges. The vulnerability is particularly concerning because it operates at the file system level, where the application's process permissions may differ from the user's actual privileges. Attackers can exploit this by creating malicious files with specific permissions that allow them to execute code with elevated privileges. The impact extends beyond simple file access, as this vulnerability can potentially allow attackers to modify system-critical components, install malicious software, or gain persistent access to the compromised system.
The operational consequences of this vulnerability are severe and multifaceted, particularly in enterprise environments where Adobe Download Manager is widely deployed. Organizations running affected versions face significant risk of unauthorized privilege escalation attacks that could compromise entire systems or networks. The vulnerability affects both individual workstations and enterprise environments where the application is centrally managed, creating potential for widespread compromise. Attackers can leverage this weakness to establish persistent backdoors, escalate privileges to administrative levels, or gain access to sensitive corporate data. The exploitability of this vulnerability is enhanced by the fact that it typically requires minimal user interaction, making it particularly dangerous in environments where users may not be security-aware. The vulnerability also impacts the overall security posture of systems, as it can serve as a foothold for more sophisticated attacks, including lateral movement and data exfiltration operations. Organizations should consider this vulnerability as part of a broader attack surface assessment, particularly in environments where multiple applications interact with file systems.
Mitigation strategies for this vulnerability require immediate attention from system administrators and security teams. The most effective approach involves updating to the latest version of Adobe Download Manager where the insecure file permissions issue has been resolved. Adobe has released patches and updates that address this specific vulnerability by implementing proper file permission controls and access validation mechanisms. Organizations should also implement additional security controls such as monitoring for unauthorized file permission changes and conducting regular vulnerability assessments. The implementation of file integrity monitoring tools can help detect potential exploitation attempts by monitoring for unexpected permission changes on critical system files. Security teams should also consider implementing application whitelisting policies that restrict the execution of unauthorized applications that might exploit similar file permission weaknesses. System hardening measures including proper user account management, least privilege principles, and regular security audits can significantly reduce the risk associated with this vulnerability. Additionally, organizations should conduct security awareness training to ensure users understand the risks associated with running potentially vulnerable software and the importance of keeping applications updated. Regular patch management processes should include verification that Adobe Download Manager installations have been properly updated to address this specific vulnerability.