CVE-2019-12256 Explained : Impact and Mitigation

Wind River VxWorks 6.9 and vx7 are vulnerable to a Buffer Overflow in the IPv4 component, specifically in the IPNET stack. This vulnerability can lead to a stack overflow when processing IP options of IPv4 packets.

Understanding CVE-2019-12256

This CVE identifies a critical security issue in Wind River VxWorks versions 6.9 and vx7, potentially allowing attackers to exploit a Buffer Overflow vulnerability in the IPv4 component.

What is CVE-2019-12256?

The vulnerability in Wind River VxWorks 6.9 and vx7 allows for a Buffer Overflow in the IPv4 component, particularly in the IPNET stack. This flaw results in a stack overflow during the parsing of IP options within IPv4 packets.

The Impact of CVE-2019-12256

The exploitation of this vulnerability could lead to a stack overflow, potentially enabling attackers to execute arbitrary code or disrupt the normal operation of affected systems.

Technical Details of CVE-2019-12256

Wind River VxWorks 6.9 and vx7 are affected by a Buffer Overflow vulnerability in the IPv4 component, specifically in the IPNET stack.

Vulnerability Description

The vulnerability manifests as a stack overflow during the processing of IP options in IPv4 packets, posing a significant security risk to affected systems.

Affected Systems and Versions

Wind River VxWorks 6.9
Wind River VxWorks vx7

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious IPv4 packets with specially designed IP options, triggering the stack overflow in the IPNET stack.

Mitigation and Prevention

It is crucial to take immediate steps to address and mitigate the CVE-2019-12256 vulnerability.

Immediate Steps to Take

Apply security patches provided by Wind River to address the Buffer Overflow issue in the IPv4 component.
Implement network segmentation to limit the impact of potential attacks targeting this vulnerability.
Monitor network traffic for any suspicious activity that may indicate exploitation attempts.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities from being exploited.
Conduct regular security assessments and penetration testing to identify and address potential weaknesses in the network infrastructure.

Patching and Updates

Wind River has released security updates to address the CVE-2019-12256 vulnerability. Ensure that all affected systems are promptly updated with the latest patches to mitigate the risk of exploitation.