CVE-2017-6649 : Exploit Details and Defense Strategies
Learn about CVE-2017-6649, a vulnerability in Cisco Nexus Series Switches allowing local attackers to execute command injection attacks. Find mitigation steps and patching details here.
A vulnerability in the Command Line Interface (CLI) of Cisco NX-OS System Software 7.1 through 7.3, running on Cisco Nexus Series Switches, allows a local attacker with authentication to execute a command injection attack. The lack of proper validation of command arguments is the root cause of this vulnerability.
Understanding CVE-2017-6649
This CVE identifies a weakness in the Cisco Nexus Series Switches that can be exploited by injecting crafted command arguments into a vulnerable CLI command.
What is CVE-2017-6649?
The vulnerability in Cisco NX-OS System Software allows an authenticated local attacker to perform a command injection attack due to insufficient input validation of command arguments.
The Impact of CVE-2017-6649
If successfully exploited, the attacker can access or modify specific files beyond their designated path at the same privilege level as the user. The associated Cisco Bug IDs are CSCvb86787, CSCve60516, and CSCve60555.
Technical Details of CVE-2017-6649
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability in the CLI of Cisco NX-OS System Software 7.1 through 7.3 allows an attacker to inject crafted command arguments into a vulnerable CLI command.
Affected Systems and Versions
- Product: Cisco Nexus Series Switches
- Versions: Cisco Nexus Series Switches
Exploitation Mechanism
- Attacker gains authentication
- Injects specifically crafted command arguments
- Executes a command injection attack
Mitigation and Prevention
Protecting systems from CVE-2017-6649 requires immediate steps and long-term security practices.
Immediate Steps to Take
- Apply vendor-supplied patches
- Monitor network traffic for signs of malicious activity
- Restrict access to vulnerable systems
Long-Term Security Practices
- Regularly update and patch systems
- Implement strong authentication mechanisms
- Conduct security training for users and administrators
Patching and Updates
Ensure timely installation of patches provided by Cisco to address the vulnerability.