CVE-2019-12670 : What You Need to Know

Cisco IOS XE Software has a vulnerability that allows a local attacker to manipulate container protections. Learn about the impact, technical details, and mitigation steps.

Understanding CVE-2019-12670

Cisco IOS XE Software IOx Guest Shell Namespace Protection Vulnerability

What is CVE-2019-12670?

The vulnerability in Cisco IOS XE Software enables a local attacker authenticated within the IOx Guest Shell to modify namespace container protections on the affected device by exploiting inadequate file permissions.

The Impact of CVE-2019-12670

CVSS Base Score: 6.7 (Medium Severity)
Attack Vector: Local
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Successful exploitation allows bypassing container protections and performing unauthorized file operations.

Technical Details of CVE-2019-12670

Vulnerability Description

The vulnerability in Cisco IOS XE Software allows an attacker to manipulate container protections by modifying restricted files, leading to unauthorized file operations.

Affected Systems and Versions

Affected Product: Cisco IOS XE Software 3.2.11aSG
Vendor: Cisco
Version: Unspecified

Exploitation Mechanism

Attacker authenticated within the IOx Guest Shell
Exploits inadequate file permissions to modify restricted files
Enables unauthorized file operations outside the container's designated area

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-supplied patches
Restrict network access to affected systems
Monitor for unauthorized access or file modifications

Long-Term Security Practices

Regularly update and patch software
Implement the principle of least privilege
Conduct security training for system administrators

Patching and Updates

Refer to the vendor's security advisory for patch availability and installation instructions