Buffer Overflow in DrayTek VigorSwitch Web Interface

Executive Summary

Multiple DrayTek VigorSwitch models have a buffer overflow flaw in the switch_lan_gvrp function. This happens when the portList field is copied into a buffer that is too small. A remote attacker could exploit this by sending specially crafted input, leading to a denial of service or potential arbitrary command execution. Access to the device's web management interface with administrative credentials is required for exploitation.

Useful 0 Not Useful 0

Detection Guidance

Detection requires checking DrayTek VigorSwitch models for the vulnerable switch_lan_gvrp function. Inspect web management interface logs for unusual input handling or crashes. No specific commands are provided in the context.

Useful 0 Not Useful 0

Impact Analysis

If exploited, this vulnerability could cause your network switch to crash, disrupting network services. In severe cases, an attacker might execute arbitrary commands on the device, potentially gaining control over your network infrastructure. This could lead to data breaches or unauthorized access to connected systems.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR or HIPAA. Organizations using affected DrayTek VigorSwitch models must address this flaw to maintain regulatory compliance and protect sensitive data.

Useful 0 Not Useful 0

Mitigation Strategies

Immediately update DrayTek VigorSwitch firmware to the latest version. Restrict administrative access to the web management interface. Monitor network traffic for suspicious activity targeting the switch_lan_gvrp function.

Useful 0 Not Useful 0