CVE-2018-0372 : Vulnerability Insights and Analysis
Discover the vulnerability in the DHCPv6 feature of Cisco Nexus 9000 Series Fabric Switches in ACI Mode, allowing remote attackers to deplete system memory, leading to a Denial of Service (DoS) scenario. Learn about affected systems, exploitation mechanism, and mitigation steps.
A potential security weakness has been identified in the DHCPv6 function of Cisco Nexus 9000 Series Fabric Switches in Application-Centric Infrastructure (ACI) Mode, leading to a Denial of Service (DoS) scenario.
Understanding CVE-2018-0372
This CVE involves a vulnerability in the DHCPv6 feature of Cisco Nexus 9000 Series Fabric Switches in ACI Mode, allowing unauthorized remote attackers to deplete system memory, resulting in a DoS condition.
What is CVE-2018-0372?
The vulnerability arises from inadequate memory management when receiving DHCPv6 packets on a targeted device interface, potentially exploited by flooding the device with malicious DHCPv6 packets.
The Impact of CVE-2018-0372
- Unauthorized remote attackers can cause system memory depletion, leading to a DoS scenario
- Specifically affects Cisco Nexus 9000 Series Fabric Switches in ACI Mode operating on software version 13.0(1k)
Technical Details of CVE-2018-0372
This section provides detailed technical information about the vulnerability.
Vulnerability Description
- Vulnerability in DHCPv6 feature of Cisco Nexus 9000 Series Fabric Switches
- Allows attackers to exhaust system memory, triggering a DoS condition
Affected Systems and Versions
- Product: Cisco Nexus 9000 Series unknown
- Version: Cisco Nexus 9000 Series unknown
Exploitation Mechanism
- Attackers flood the device with malicious DHCPv6 packets
- Vulnerability only applies to IPv6 protocol packets
- Unicast routing must be enabled on the Bridge Domain (BD) for exploitation
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2018-0372.
Immediate Steps to Take
- Disable unicast routing on the Bridge Domain (BD)
- Implement proper network traffic filtering
- Apply the necessary software updates and patches
Long-Term Security Practices
- Regularly monitor network traffic for unusual patterns
- Keep systems up to date with the latest security patches
Patching and Updates
- Apply the recommended software updates provided by Cisco