CVE-2017-12329 : Exploit Details and Defense Strategies

A vulnerability in the CLI of Cisco Firepower Extensible Operating System (FXOS) and NX-OS System Software could potentially lead to a command injection attack if exploited by an authenticated, local attacker. This CVE affects various Cisco products running FXOS or NX-OS System Software.

Understanding CVE-2017-12329

This CVE involves a vulnerability in the CLI of Cisco Firepower Extensible Operating System (FXOS) and NX-OS System Software that could allow an attacker to execute arbitrary commands.

What is CVE-2017-12329?

The vulnerability arises from inadequate validation of command arguments in the CLI parser, enabling an attacker to inject manipulated command arguments and execute arbitrary commands at the user's privilege level. This could lead to unauthorized command execution outside the user's environment on systems supporting multiple virtual device contexts.

The Impact of CVE-2017-12329

An authenticated, local attacker could exploit this vulnerability to perform a command injection attack.
Attackers could execute arbitrary commands at the user's privilege level, potentially compromising system integrity.

Technical Details of CVE-2017-12329

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in the CLI of Cisco FXOS and NX-OS allows attackers to inject crafted command arguments, leading to arbitrary command execution at the user's privilege level.

Affected Systems and Versions

Firepower 4100 Series Next-Generation Firewall
Firepower 9300 Security Appliance
Various Nexus Series Switches
Unified Computing System Manager

Exploitation Mechanism

Insufficient input validation of command arguments in the CLI parser
Injection of manipulated command arguments by an attacker
Execution of arbitrary commands at the user's privilege level

Mitigation and Prevention

Protecting systems from CVE-2017-12329 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches and updates promptly.
Monitor network traffic for signs of exploitation.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Implement strong authentication mechanisms.
Conduct regular security audits and assessments.

Patching and Updates

Cisco has released patches to address this vulnerability.
Ensure all affected systems are updated with the latest security fixes.