CVE-2019-12643 : Security Advisory and Response

A security flaw in the Cisco REST API virtual service container for Cisco IOS XE Software allows unauthorized attackers to override authentication on managed devices.

Understanding CVE-2019-12643

This CVE involves a vulnerability in the Cisco REST API virtual service container for Cisco IOS XE Software, potentially enabling attackers to bypass authentication.

What is CVE-2019-12643?

The vulnerability arises from inadequate checks in the code handling the REST API authentication service, allowing attackers to send malicious HTTP requests to acquire an authenticated user's token-id.

The Impact of CVE-2019-12643

CVSS Score: 10.0 (Critical)
Attack Vector: Network
Confidentiality Impact: High
Integrity Impact: High
Availability Impact: High
Scope: Changed
This vulnerability could lead to unauthorized access and privilege escalation on affected devices.

Technical Details of CVE-2019-12643

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw allows attackers to bypass authentication on Cisco IOS XE devices.

Affected Systems and Versions

Affected Product: Cisco IOS XE Software
Versions Affected: Less than 16.09.03

Exploitation Mechanism

Attackers exploit the vulnerability by sending malicious HTTP requests to the targeted device.

Mitigation and Prevention

Protect your systems from this vulnerability by following these steps:

Immediate Steps to Take

Disable the REST API interface if not required.
Monitor network traffic for any suspicious activity.
Apply vendor-supplied patches or updates promptly.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Implement network segmentation to limit the impact of potential breaches.

Patching and Updates

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