CVE-2018-18435 : What You Need to Know
Learn about CVE-2018-18435, a vulnerability in KioWare Server version 4.9.6 and earlier that allows users to escalate privileges to NT AUTHORITY\SYSTEM. Find out how to mitigate this issue and prevent unauthorized access.
KioWare Server version 4.9.6 and earlier have a vulnerability that allows users to escalate privileges to NT AUTHORITY\SYSTEM by manipulating folder permissions and service binaries.
Understanding CVE-2018-18435
This CVE involves a privilege escalation vulnerability in KioWare Server version 4.9.6 and older.
What is CVE-2018-18435?
KioWare Server versions 4.9.6 and earlier have weak folder permissions that grant all users full access to the installation directory, potentially enabling privilege escalation to NT AUTHORITY\SYSTEM.
The Impact of CVE-2018-18435
The vulnerability allows any user to elevate their privileges to NT AUTHORITY\SYSTEM by replacing the service's binary with a malicious one.
Technical Details of CVE-2018-18435
This section provides more in-depth technical information about the vulnerability.
Vulnerability Description
KioWare Server version 4.9.6 and older install with weak folder permissions, granting full access to all users and allowing privilege escalation.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions affected: All versions up to and including 4.9.6
Exploitation Mechanism
The vulnerability arises from weak folder permissions in the default installation directory, combined with the service running under the Localsystem account, enabling users to replace the service's binary with a malicious one.
Mitigation and Prevention
To address CVE-2018-18435, follow these mitigation steps:
Immediate Steps to Take
- Apply the security patch provided by KioWare.
- Restrict access to the installation directory to authorized users only.
- Monitor for any unauthorized changes to the service binaries.
Long-Term Security Practices
- Regularly review and update folder permissions to ensure least privilege access.
- Implement a robust privilege management system to prevent unauthorized escalation.
Patching and Updates
Ensure that you regularly update KioWare Server to the latest version to mitigate known vulnerabilities and apply security patches promptly.