CVE-2018-5349 : Exploit Details and Defense Strategies

A vulnerability has been discovered in version 2.2.190 of Heimdal PRO, potentially affecting Heimdal FREE and Heimdal CORP. Incorrect permissions in a specific directory allow for privilege escalation, enabling attackers to gain elevated privileges.

Understanding CVE-2018-5349

This CVE highlights a security flaw in Heimdal PRO version 2.2.190 and potentially in other Heimdal products, allowing attackers to exploit incorrect directory permissions.

What is CVE-2018-5349?

The vulnerability in Heimdal PRO version 2.2.190 and related products stems from incorrect permissions in a directory, enabling privilege escalation through a malicious file injection.

The Impact of CVE-2018-5349

The vulnerability allows attackers to gain elevated privileges by placing a malicious file in a specific directory, potentially compromising the security of affected systems.

Technical Details of CVE-2018-5349

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The issue arises from incorrect permissions in the directory "C:\ProgramData\Heimdal Security\Heimdal Agent," enabling BUILTIN\Users to write new files. This vulnerability allows for privilege escalation by loading a malicious version.dll during the startup process.

Affected Systems and Versions

Heimdal PRO version 2.2.190
Potentially affects Heimdal FREE and Heimdal CORP

Exploitation Mechanism

Attackers can exploit the vulnerability by placing a malicious version.dll in the vulnerable directory
During startup, the process Heimdal.MonitorServices.exe, running as SYSTEM, loads the malicious file, leading to privilege escalation

Mitigation and Prevention

Protecting systems from CVE-2018-5349 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor
Restrict access to the vulnerable directory
Monitor for any unauthorized file changes

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities
Implement least privilege access controls to limit potential damage

Patching and Updates

Ensure all Heimdal products are updated to the latest versions
Regularly check for security advisories and apply patches promptly