CVE-2017-6672 : Vulnerability Insights and Analysis

A vulnerability in certain access control lists (ACLs) filtering mechanisms used by Cisco ASR 5000 Series Aggregation Services Routers through version 21.x could allow an unauthenticated attacker to bypass configured ACL rules.

Understanding CVE-2017-6672

This CVE involves a security bypass vulnerability in Cisco ASR 5000 Series Aggregation Services Routers.

What is CVE-2017-6672?

The flaw in ACL filtering mechanisms of Cisco ASR 5000 Series Routers allows an attacker to circumvent ACL rules set for a specific device.

The Impact of CVE-2017-6672

The vulnerability could enable an unauthenticated or remote attacker to bypass ACL rules configured for the affected device.

Technical Details of CVE-2017-6672

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability in ACL filtering mechanisms of Cisco ASR 5000 Series Routers allows unauthorized access to devices.

Affected Systems and Versions

Product: Cisco ASR 5000 Series Aggregation Services Routers
Versions affected: Cisco ASR 5000 Series Aggregation Services Routers through 21.x

Exploitation Mechanism

Attackers can exploit this vulnerability remotely without authentication.

Mitigation and Prevention

Protect your systems from CVE-2017-6672 with these security measures.

Immediate Steps to Take

Apply vendor-supplied patches promptly.
Monitor network traffic for any signs of exploitation.
Restrict network access to vulnerable devices.

Long-Term Security Practices

Regularly update and patch all network devices.
Implement strong access control policies and monitor ACL configurations.

Patching and Updates

Cisco has released patches to address this vulnerability.