CVE-2019-12653 : Security Advisory and Response

Cisco IOS XE Software Raw Socket Transport Denial of Service Vulnerability

Understanding CVE-2019-12653

This CVE involves a vulnerability in Cisco IOS XE Software that could allow a remote attacker to trigger a denial of service (DoS) condition by exploiting the Raw Socket Transport feature.

What is CVE-2019-12653?

The vulnerability arises from the mishandling of Raw Socket Transport data, enabling an attacker to initiate a restart of a targeted device through a TCP session and harmful TCP segment transmission via IPv4.

The Impact of CVE-2019-12653

The vulnerability poses a high availability impact, with a CVSS base score of 8.6, indicating a severe threat to affected systems.

Technical Details of CVE-2019-12653

Vulnerability Description

Improper parsing of Raw Socket Transport payloads in Cisco IOS XE Software

Affected Systems and Versions

Product: Cisco IOS XE Software
Vendor: Cisco
Versions: Unspecified

Exploitation Mechanism

Attacker establishes a TCP session and sends a malicious TCP segment via IPv4
IPv6 is not vulnerable due to lack of support in Raw Socket Transport

Mitigation and Prevention

Immediate Steps to Take

Apply vendor-provided patches and updates promptly
Implement network segmentation to limit exposure
Monitor network traffic for any suspicious activity

Long-Term Security Practices

Regularly update and patch all software and firmware
Conduct security assessments and penetration testing
Educate users on safe internet practices

Patching and Updates

Refer to the Cisco Security Advisory for specific patch details and instructions