CVE-2017-11157 : Vulnerability Insights and Analysis

Synology Cloud Station Backup before version 4.2.5-4396 on Windows is vulnerable to multiple untrusted search path issues that can lead to arbitrary code execution and DLL hijacking attacks.

Understanding CVE-2017-11157

What is CVE-2017-11157?

The installer in Synology Cloud Station Backup on Windows is susceptible to local attackers introducing malicious files, enabling them to execute arbitrary code and conduct DLL hijacking attacks.

The Impact of CVE-2017-11157

The vulnerabilities in CVE-2017-11157 can allow local attackers to compromise the system by executing arbitrary code and carrying out DLL hijacking attacks.

Technical Details of CVE-2017-11157

Vulnerability Description

The installer in Synology Cloud Station Backup before version 4.2.5-4396 on Windows is affected by untrusted search path vulnerabilities, enabling local attackers to introduce malicious files for arbitrary code execution and DLL hijacking attacks.

Affected Systems and Versions

Product: Synology Cloud Station Backup
Vendor: Synology
Versions affected: Before 4.2.5-4396

Exploitation Mechanism

Local attackers can exploit CVE-2017-11157 by introducing Trojan horse files like shfolder.dll, ntmarta.dll, secur32.dll, or dwmapi.dll into the current working directory.

Mitigation and Prevention

Immediate Steps to Take

Update Synology Cloud Station Backup to version 4.2.5-4396 or later.
Avoid running the application from directories where untrusted files can be placed.

Long-Term Security Practices

Regularly monitor and update software to patch vulnerabilities.
Implement file integrity monitoring to detect unauthorized changes.

Patching and Updates

Apply security patches provided by Synology promptly to mitigate the risk of exploitation.