CVE-2019-12109 : Exploit Details and Defense Strategies

A Denial of Service vulnerability exists in MiniUPnP MiniUPnPd through version 2.1 due to a NULL pointer dereference in the GetOutboundPinholeTimeout function of the upnpsoap.c file.

Understanding CVE-2019-12109

This CVE involves a vulnerability in MiniUPnP MiniUPnPd that can lead to Denial of Service attacks.

What is CVE-2019-12109?

The vulnerability is caused by a NULL pointer dereference in the function GetOutboundPinholeTimeout of the upnpsoap.c file, specifically for the rem_port parameter.

The Impact of CVE-2019-12109

The vulnerability can be exploited by attackers to cause Denial of Service, potentially disrupting services and affecting system availability.

Technical Details of CVE-2019-12109

This section provides technical details about the CVE.

Vulnerability Description

The vulnerability in MiniUPnP MiniUPnPd through version 2.1 is due to a NULL pointer dereference in the GetOutboundPinholeTimeout function of the upnpsoap.c file.

Affected Systems and Versions

Product: MiniUPnP MiniUPnPd
Vendor: N/A
Versions affected: Through version 2.1

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating the rem_port parameter, leading to a NULL pointer dereference and potential Denial of Service.

Mitigation and Prevention

Protecting systems from CVE-2019-12109 is crucial to maintaining security.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Monitor network traffic for any suspicious activity targeting the vulnerable component.

Long-Term Security Practices

Regularly update and patch software to address known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories and updates from MiniUPnPd.
Ensure all systems are running the latest patched versions to mitigate the risk of exploitation.