CVE-2018-0299 : Exploit Details and Defense Strategies
Learn about CVE-2018-0299, a vulnerability in Cisco NX-OS on the Nexus 4000 Series Switch, allowing remote attackers to cause device reloads, leading to denial of service. Find mitigation steps and patching advice here.
Cisco Nexus 4000 Series Switch SNMP Vulnerability
Understanding CVE-2018-0299
This CVE involves a weakness in the SNMP feature of Cisco NX-OS on the Cisco Nexus 4000 Series Switch, potentially leading to a denial of service situation.
What is CVE-2018-0299?
The vulnerability arises from inadequate validation of a specific MIB in an SNMP poll request, allowing an authenticated remote attacker to trigger a device reload, causing a denial of service.
The Impact of CVE-2018-0299
The exploit could lead to unexpected device reloads, disrupting services and potentially causing downtime for affected systems.
Technical Details of CVE-2018-0299
Vulnerability Description
The vulnerability in the SNMP feature of Cisco NX-OS on the Cisco Nexus 4000 Series Switch allows an attacker to exploit incomplete validation of an SNMP poll request, leading to device reloads.
Affected Systems and Versions
- Product: Cisco Nexus 4000 unknown
- Versions: Cisco Nexus 4000 unknown
Exploitation Mechanism
- An authenticated remote attacker can send a specific SNMP poll request to the vulnerable device
- Successful exploitation triggers a device reload, resulting in a denial of service condition
Mitigation and Prevention
Immediate Steps to Take
- Apply vendor-supplied patches and updates promptly
- Implement network segmentation to limit SNMP exposure
- Monitor SNMP traffic for suspicious activity
Long-Term Security Practices
- Regularly update and patch network devices
- Conduct security assessments and audits to identify vulnerabilities
Patching and Updates
- Refer to Cisco's security advisory for specific patch information