CVE-2019-6445 : What You Need to Know
Discover the impact of CVE-2019-6445, a vulnerability in NTPsec software versions before 1.1.3, allowing an authenticated attacker to crash ntpd through a NULL pointer dereference in ntp_control.c.
NTPsec, a software application, has a vulnerability in versions prior to 1.1.3 that can be exploited by an authenticated malicious user to trigger a crash in ntpd, resulting in a NULL pointer dereference.
Understanding CVE-2019-6445
This CVE involves a vulnerability in NTPsec software that can lead to a denial-of-service condition.
What is CVE-2019-6445?
The vulnerability in NTPsec before version 1.1.3 allows an authenticated attacker to cause a NULL pointer dereference and crash ntpd in the ntp_control.c file, specifically related to the ctl_getitem function.
The Impact of CVE-2019-6445
Exploitation of this vulnerability can result in a denial-of-service condition by crashing the ntpd service, affecting system availability and potentially disrupting time synchronization.
Technical Details of CVE-2019-6445
NTPsec vulnerability details and affected systems.
Vulnerability Description
The vulnerability in NTPsec versions prior to 1.1.3 allows an authenticated malicious user to trigger a crash in ntpd through a NULL pointer dereference in the ctl_getitem function.
Affected Systems and Versions
- Product: NTPsec
- Vendor: N/A
- Versions Affected: Versions prior to 1.1.3
Exploitation Mechanism
The vulnerability can be exploited by an authenticated attacker to send specially crafted requests to the ctl_getitem function, leading to a NULL pointer dereference and subsequent crash of the ntpd service.
Mitigation and Prevention
Steps to mitigate and prevent the exploitation of CVE-2019-6445.
Immediate Steps to Take
- Update NTPsec to version 1.1.3 or later to mitigate the vulnerability.
- Monitor network traffic for any suspicious activity targeting NTP services.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Implement strong authentication mechanisms to prevent unauthorized access to NTP services.
Patching and Updates
- Apply patches provided by NTPsec to fix the vulnerability.
- Stay informed about security advisories related to NTPsec to apply timely updates.