CVE-2017-6666 Explained : Impact and Mitigation
Learn about CVE-2017-6666, a vulnerability in Cisco Network Convergence System 5500 Series Routers that could lead to a denial of service (DoS) condition. Find out affected versions and mitigation steps.
A weakness has been detected in the forwarding component of Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series Routers, potentially leading to a denial of service (DoS) condition.
Understanding CVE-2017-6666
This CVE involves a vulnerability in Cisco Network Convergence System 5500 Series Routers that could be exploited by a verified attacker, resulting in a DoS condition.
What is CVE-2017-6666?
The vulnerability in the forwarding component of Cisco IOS XR Software for Cisco NCS 5500 Series Routers could allow an attacker to interrupt data traffic across Traffic Engineering (TE) tunnels, causing a DoS condition.
The Impact of CVE-2017-6666
The exploitation of this vulnerability could lead to the interruption of data traffic across TE tunnels on the router, resulting in a denial of service (DoS) condition.
Technical Details of CVE-2017-6666
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability in the forwarding component of Cisco IOS XR Software for Cisco NCS 5500 Series Routers allows an attacker to disrupt data traffic across TE tunnels, potentially causing a DoS condition.
Affected Systems and Versions
- Affected Product: Cisco Network Convergence System 5500 Series Routers
- Affected Version: 6.2.11.BASE
- Fixed Versions: 6.1.3, 6.1.2, 6.3.1.8i.BASE, 6.2.11.8i.BASE, 6.2.2.9i.BASE, 6.1.32.11i.BASE, 6.1.31.10i.BASE, 6.1.4.3i.BASE
Exploitation Mechanism
The vulnerability could be exploited by a verified attacker who is physically present, leading to the interruption of data traffic across TE tunnels on the router.
Mitigation and Prevention
Steps to address and prevent the CVE.
Immediate Steps to Take
- Apply the provided fixed versions to mitigate the vulnerability.
- Monitor network traffic for any signs of exploitation.
Long-Term Security Practices
- Regularly update and patch network devices to prevent vulnerabilities.
- Implement network segmentation and access controls to limit the impact of potential attacks.
Patching and Updates
- Ensure all affected systems are updated with the fixed versions to prevent exploitation of the vulnerability.