CVE-2019-6444 : Exploit Details and Defense Strategies

A vulnerability was found in NTPsec version 1.1.3 and earlier, leading to a stack-based buffer over-read in the ntp_control.c file.

Understanding CVE-2019-6444

What is CVE-2019-6444?

CVE-2019-6444 is a vulnerability in NTPsec versions 1.1.3 and earlier, specifically within the ntp_control.c file, where the process_control() function is prone to a stack-based buffer over-read.

The Impact of CVE-2019-6444

This vulnerability allows attackers to exploit the stack-based buffer over-read by manipulating data, potentially leading to information disclosure or denial of service.

Technical Details of CVE-2019-6444

Vulnerability Description

The issue arises from the process_control() function in ntp_control.c, where attacker-controlled data is dereferenced by ntohl() in the ntpd module, causing a stack-based buffer over-read.

Affected Systems and Versions

NTPsec version 1.1.3 and earlier

Exploitation Mechanism

Attackers can exploit this vulnerability by providing malicious input to the affected function, triggering the stack-based buffer over-read.

Mitigation and Prevention

Immediate Steps to Take

Update NTPsec to version 1.1.3 or later to mitigate the vulnerability
Monitor network traffic for any suspicious activity

Long-Term Security Practices

Regularly update software and apply patches promptly
Implement network segmentation to limit the impact of potential attacks

Patching and Updates

Stay informed about security updates for NTPsec and apply them as soon as they are available