CVE-2019-14323 : Security Advisory and Response

SSDP Responder versions 1.x to 1.5 encounter a stack-based buffer overflow due to mishandling incoming network messages, leading to a server crash.

Understanding CVE-2019-14323

What is CVE-2019-14323?

The vulnerability in SSDP Responder versions 1.x to 1.5 results in a stack-based buffer overflow due to mishandling of incoming network messages, causing a server crash under specific conditions.

The Impact of CVE-2019-14323

The vulnerability allows attackers to potentially crash the server, impacting system availability and stability.

Technical Details of CVE-2019-14323

Vulnerability Description

SSDP Responder 1.x through 1.5 mishandles incoming network messages, leading to a stack-based buffer overflow by one byte.
The issue arises from an off-by-one error in the ssdp_recv function in ssdpd.c.

Affected Systems and Versions

SSDP Responder versions 1.x to 1.5

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted network messages to trigger the buffer overflow.

Mitigation and Prevention

Immediate Steps to Take

Disable strict stack checking if possible to mitigate the risk of a server crash.
Implement network monitoring to detect and block malicious network traffic.

Long-Term Security Practices

Regularly update the SSDP Responder software to the latest version to patch known vulnerabilities.
Conduct security audits and code reviews to identify and address potential buffer overflow issues.
Follow secure coding practices to prevent buffer overflow vulnerabilities.
Stay informed about security advisories and patches from the software vendor.

Patching and Updates

Apply patches provided by the software vendor promptly to address the buffer overflow vulnerability.