CVE-2017-3862 : Vulnerability Insights and Analysis

Cisco IOS and IOS XE EnergyWise Module Vulnerabilities

Understanding CVE-2017-3862

Multiple vulnerabilities in the EnergyWise module of Cisco IOS and IOS XE could allow remote attackers to cause denial of service (DoS) conditions.

What is CVE-2017-3862?

The CVE-2017-3862 vulnerability pertains to flaws in the EnergyWise module of Cisco IOS and IOS XE, potentially enabling remote, unauthenticated attackers to trigger buffer overflows or device reloads, leading to DoS situations.

The Impact of CVE-2017-3862

Attackers can exploit EnergyWise vulnerabilities to cause buffer overflows or device reloads, resulting in DoS scenarios.
Vulnerabilities stem from incorrect parsing of manipulated EnergyWise packets, affecting devices configured as EnergyWise domain members.

Technical Details of CVE-2017-3862

Vulnerability Description

Improper parsing of crafted EnergyWise packets can lead to buffer overflow or device reload.

Affected Systems and Versions

Cisco IOS versions 12.2 and 15.0 to 15.6
Cisco IOS XE versions 3.2 to 3.18

Exploitation Mechanism

Attackers send manipulated EnergyWise packets to affected devices, triggering buffer overflows or reloads.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-supplied patches promptly.
Implement network segmentation to limit exposure.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update and patch systems.
Conduct security training for staff to recognize and respond to potential threats.
Employ intrusion detection and prevention systems.

Patching and Updates

Refer to Cisco's security advisory for specific patch details and instructions.