CVE-2018-0256 Explained : Impact and Mitigation

A vulnerability in the peer-to-peer message processing functionality of Cisco Packet Data Network Gateway could allow an unauthenticated, remote attacker to cause the Session Manager (SESSMGR) process on an affected device to restart, resulting in a denial of service (DoS) condition. The flaw lies in the inadequate validation of peer-to-peer packet headers, enabling an attacker to exploit this vulnerability by sending a crafted peer-to-peer packet through the affected device.

Understanding CVE-2018-0256

This CVE entry describes a vulnerability in Cisco Packet Data Network Gateway that could lead to a denial of service (DoS) attack.

What is CVE-2018-0256?

The vulnerability in Cisco Packet Data Network Gateway allows an unauthorized remote attacker to trigger a denial of service (DoS) scenario by causing the affected device's Session Manager (SESSMGR) process to restart. The flaw is a result of inadequate validation of peer-to-peer packet headers.

The Impact of CVE-2018-0256

Exploiting this vulnerability could lead to the unexpected restart of the SESSMGR process on the affected device, causing a brief disruption in traffic and resulting in a DoS situation.

Technical Details of CVE-2018-0256

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability in Cisco Packet Data Network Gateway arises from the incorrect validation of peer-to-peer packet headers, allowing attackers to manipulate packets and trigger a DoS scenario.

Affected Systems and Versions

Product: Cisco Packet Data Network Gateway
Version: Cisco Packet Data Network Gateway

Exploitation Mechanism

Attackers exploit the vulnerability by sending manipulated peer-to-peer packets through the affected device.

Mitigation and Prevention

Protecting systems from CVE-2018-0256 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply patches and updates provided by Cisco promptly.
Monitor network traffic for any suspicious activity.
Implement access controls to limit exposure to the vulnerability.

Long-Term Security Practices

Regularly update and patch all software and firmware on network devices.
Conduct security assessments and penetration testing to identify and address vulnerabilities.

Patching and Updates

Cisco has released patches to address this vulnerability. Ensure all affected devices are updated with the latest security fixes.