CVE-2018-0311 Explained : Impact and Mitigation
Learn about CVE-2018-0311, a vulnerability in Cisco FXOS and NX-OS Software that could lead to a denial of service (DoS) attack. Find out how to mitigate the risk and protect your network infrastructure.
Cisco FXOS and NX-OS Software contain a vulnerability in the Cisco Fabric Services component that could lead to a denial of service (DoS) attack. Unauthorized remote attackers could exploit this flaw to cause a buffer overflow, resulting in process crashes and a DoS condition on affected devices.
Understanding CVE-2018-0311
This CVE identifies a vulnerability in Cisco FXOS and NX-OS Software that could be exploited by attackers to trigger a DoS situation on vulnerable devices.
What is CVE-2018-0311?
A flaw in the Cisco Fabric Services component of Cisco FXOS and NX-OS Software allows unauthenticated remote attackers to launch DoS attacks by sending specially crafted packets to targeted devices.
The Impact of CVE-2018-0311
The vulnerability could lead to process crashes and a DoS condition on affected devices, impacting the availability and functionality of critical network infrastructure.
Technical Details of CVE-2018-0311
Cisco FXOS and NX-OS Software are affected by a vulnerability in the Cisco Fabric Services component, potentially leading to a DoS scenario.
Vulnerability Description
The flaw arises from inadequate validation of Cisco Fabric Services packets during packet data processing, enabling attackers to exploit the vulnerability.
Affected Systems and Versions
Vulnerable products include Firepower 4100 Series Next-Generation Firewalls, Nexus switches, MDS switches, UCS Fabric Interconnects, and more.
Exploitation Mechanism
Attackers can exploit the vulnerability by sending maliciously crafted Cisco Fabric Services packets to targeted devices, causing buffer overflow and process crashes.
Mitigation and Prevention
Steps to address and prevent the CVE-2018-0311 vulnerability.
Immediate Steps to Take
- Apply vendor-supplied patches and updates promptly.
- Implement network segmentation to limit the impact of potential attacks.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch all software and firmware in the network.
- Conduct security assessments and penetration testing to identify and address vulnerabilities.
- Educate network administrators and users on best security practices.
Patching and Updates
- Cisco has released patches to address the vulnerability in affected software versions.