CVE-2017-12237 : Vulnerability Insights and Analysis

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS and IOS XE could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition by triggering high CPU usage, generating traceback messages, or forcing device reloads.

Understanding CVE-2017-12237

This CVE identifies a flaw in the IKEv2 module of Cisco IOS and IOS XE that could lead to a DoS attack.

What is CVE-2017-12237?

The vulnerability allows unauthorized remote attackers to exploit specific IKEv2 packets, causing high CPU usage, traceback messages, or device reloads, resulting in a DoS scenario.

The Impact of CVE-2017-12237

Unauthorized remote attackers can initiate a DoS condition on affected devices by exploiting the IKEv2 vulnerability.
The flaw can lead to high CPU utilization, traceback messages, or device reloads.

Technical Details of CVE-2017-12237

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability lies in how affected devices process certain IKEv2 packets.
Attackers can exploit this by sending specific IKEv2 packets to the device.

Affected Systems and Versions

Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 are impacted.
Devices with ISAKMP enabled are vulnerable.

Exploitation Mechanism

Attackers need to transmit particular IKEv2 packets to the device for processing.
Successful exploitation can lead to high CPU usage, traceback messages, or device reloads.

Mitigation and Prevention

Protecting systems from CVE-2017-12237 involves taking immediate and long-term security measures.

Immediate Steps to Take

Apply vendor-supplied patches and updates promptly.
Disable ISAKMP if not required for operation.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

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