CVE-2024-34019 in Snap Deploy
Summary
by MITRE • 08/29/2024
Local privilege escalation due to DLL hijacking vulnerability. The following products are affected: Acronis Snap Deploy (Windows) before build 4569.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 09/13/2024
This vulnerability represents a critical local privilege escalation vector through DLL hijacking that affects Acronis Snap Deploy versions prior to build 4569 on Windows systems. The flaw stems from improper dynamic link library loading mechanisms within the software's execution environment, creating opportunities for malicious actors to execute arbitrary code with elevated privileges. The vulnerability is classified under CWE-426 as an Untrusted Search Path, where the application fails to properly validate or control the paths from which dynamic libraries are loaded.
The technical implementation of this vulnerability occurs when Acronis Snap Deploy attempts to load required DLL components during its normal operation. Attackers can exploit this by placing malicious DLL files in directories that are searched before the legitimate library locations, effectively hijacking the execution flow. This occurs because the application's search path prioritizes user-writable directories or locations that are not properly secured, allowing unauthorized code injection. The vulnerability is particularly dangerous as it requires no special privileges to exploit initially, making it a common target for initial access vectors that can then be leveraged for privilege escalation.
The operational impact of CVE-2024-34019 extends beyond simple code execution, as it can enable complete system compromise when exploited by adversaries. Attackers can use this vulnerability to escalate privileges from standard user accounts to SYSTEM level access, providing them with unrestricted control over the affected system. This makes the vulnerability particularly attractive for persistent threat actors who seek long-term access to target environments. The attack surface is significant in enterprise environments where Acronis Snap Deploy is commonly deployed for system imaging and deployment operations, as these systems often run with elevated privileges and may be accessible to multiple user accounts.
Mitigation strategies for this vulnerability should focus on immediate patching of affected Acronis Snap Deploy installations to build 4569 or later versions where the DLL loading behavior has been corrected. Organizations should implement strict application whitelisting policies to prevent unauthorized DLL loading, particularly in system directories and common search paths. The principle of least privilege should be enforced by ensuring that Acronis Snap Deploy applications run with minimal required permissions and that system directories are properly secured against unauthorized modifications. Additionally, security monitoring should be enhanced to detect suspicious DLL loading patterns and file system modifications in critical directories, as outlined in the ATT&CK framework's technique T1574 for Hijacking Execution Flow.
Security teams should also consider implementing behavioral monitoring solutions that can detect anomalous DLL loading sequences and unauthorized privilege escalation attempts. Regular vulnerability assessments should include checks for similar search path vulnerabilities in other enterprise software applications, as this represents a common class of flaws that can be exploited for privilege escalation. The vulnerability demonstrates the importance of proper DLL loading security practices and highlights the need for comprehensive security testing of third-party applications, particularly those that operate with elevated privileges in enterprise environments. Organizations should maintain updated threat intelligence on similar vulnerabilities and ensure their incident response procedures include specific protocols for handling privilege escalation exploits.