#VU127481 Division by zero in ntpd-rs
Published: February 28, 2025 / Updated: April 24, 2026
Vulnerability identifier: #VU127481
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-369
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
ntpd-rs
ntpd-rs
Software vendor:
Project Pendulum
Project Pendulum
Description
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to division by zero in the NTS client cookie handling logic when calculating the number of new cookies to request from zero-sized cookies. A remote user can send zero-sized cookies to cause a denial of service.
Only configured NTS sources can exploit this issue; unconfigured NTP sources and third parties cannot.
Remediation
Install security update from vendor's website.