CVE-2017-6690 : What You Need to Know

A weakness has been identified in the file check operation of Cisco ASR 5000 Series Aggregated Services Routers running on the Cisco StarOS operating system, potentially allowing a remote attacker to overwrite or modify files on the affected system.

Understanding CVE-2017-6690

This CVE involves an Arbitrary File Modification Vulnerability in Cisco StarOS.

What is CVE-2017-6690?

The vulnerability in the file check operation of Cisco ASR 5000 Series Aggregated Services Routers on Cisco StarOS could be exploited by a remote attacker with authentication to manipulate files on the system.

The Impact of CVE-2017-6690

An authenticated remote attacker could overwrite or modify files on the affected system.

Technical Details of CVE-2017-6690

This section provides technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to overwrite or modify arbitrary files on the system.

Affected Systems and Versions

Affected releases: 21.0.v0.65839 and 21.3.M0.67005
Fixed releases: 21.4.A0.67087, 21.4.A0.67079, 21.4.A0.67013, 21.3.M0.67084, 21.3.M0.67077, 21.3.M0.66994, 21.3.J0.66993, 21.1.v0.67082, and 21.1.V0.67083

Exploitation Mechanism

Remote attackers with authentication can exploit the vulnerability to manipulate files on the system.

Mitigation and Prevention

Steps to address and prevent the CVE.

Immediate Steps to Take

Apply patches for the fixed releases provided by Cisco.
Monitor network traffic for any suspicious activity.
Restrict network access to the affected systems.

Long-Term Security Practices

Regularly update and patch systems to prevent vulnerabilities.
Implement strong authentication mechanisms to prevent unauthorized access.

Patching and Updates

Ensure all systems are updated with the fixed releases to mitigate the vulnerability.