CVE-2017-17901 Explained : Impact and Mitigation

The ZyXEL P-660HW v3 devices are vulnerable to a denial of service attack due to a specific network packet flooding issue.

Understanding CVE-2017-17901

This CVE identifies a vulnerability in ZyXEL P-660HW v3 devices that can be exploited by remote attackers to cause a denial of service by flooding the system with IP packets.

What is CVE-2017-17901?

The vulnerability in ZyXEL P-660HW v3 devices allows attackers to trigger high CPU consumption by sending a flood of IP packets with a TTL value of 1.

The Impact of CVE-2017-17901

Remote attackers can exploit this vulnerability to disrupt the normal operation of ZyXEL P-660HW v3 devices.
The attack can lead to high CPU consumption, potentially causing system unresponsiveness.

Technical Details of CVE-2017-17901

This section provides more in-depth technical information about the CVE.

Vulnerability Description

The vulnerability is caused by remote attackers flooding the system with IP packets having a TTL value of 1.

Affected Systems and Versions

Product: ZyXEL P-660HW v3
Vendor: ZyXEL
Versions affected: Not specified

Exploitation Mechanism

Attackers exploit the vulnerability by sending a large number of IP packets with a TTL value of 1, overwhelming the system and leading to high CPU usage.

Mitigation and Prevention

Protecting systems from CVE-2017-17901 requires immediate actions and long-term security practices.

Immediate Steps to Take

Monitor network traffic for any signs of unusual packet flooding activities.
Implement network filtering rules to block IP packets with a TTL value of 1.
Update firmware or apply patches provided by ZyXEL to mitigate the vulnerability.

Long-Term Security Practices

Regularly update and patch network devices to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate potential weaknesses.

Patching and Updates

Stay informed about security advisories from ZyXEL and apply patches promptly to secure the devices.