Heap-based Buffer Overflow in Windows Internet Connection Sharing

Executive Summary

This is a heap-based buffer overflow vulnerability in Windows Internet Connection Sharing (ICS). It allows an authorized attacker to execute arbitrary code over an adjacent network by exploiting memory corruption in the ICS service.

Useful 0 Not Useful 0

Detection Guidance

Detecting this vulnerability requires checking for vulnerable Windows versions and ICS service configurations. Use PowerShell commands like 'Get-WindowsProduct -ProductName *Windows*' to list installed Windows versions and verify if they match affected CPEs. Check ICS service status with 'Get-Service SharedAccess' to see if it is running.

Useful 0 Not Useful 0

Impact Analysis

An attacker within the same network could exploit this to run malicious code on your system, potentially gaining control over it. This could lead to data theft, installation of malware, or further network compromise.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability allows remote code execution over an adjacent network, which could lead to unauthorized access to sensitive data. Such access may violate confidentiality requirements under GDPR and HIPAA, potentially resulting in data breaches and non-compliance with regulatory standards.

Useful 0 Not Useful 0

Mitigation Strategies

Apply the latest Windows security updates immediately. Disable Internet Connection Sharing (ICS) if not required using 'Set-Service SharedAccess -StartupType Disabled' in PowerShell. Block adjacent network access to ICS ports (UDP 3702, TCP 5355) via firewall rules until patched.

Useful 0 Not Useful 0