CVE-2023-33192CWE-130

Improper handling of NTS cookie length that could crash the ntpd-rs server

High · published May 27, 2023

CVSS v3.1
7.5
EPSS
1%
Percentile
52.9
In the wild
Unconfirmed
What it is

ntpd-rs is an NTP implementation written in Rust. ntpd-rs does not validate the length of NTS cookies in received NTP packets to the server. An attacker can crash the server by sending a specially crafted NTP packet containing a cookie shorter than what the server expects. The server also crashes when it is not configured to handle NTS packets. The issue was caused by improper slice indexing. The indexing operations were replaced by safer alternatives that do not crash the ntpd-rs server process but instead properly handle the error condition. A patch was released in version 0.3.3.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00708 · 52.9th percentile
Weakness
CWE-130 · Improper Handling of Length Parameter Inconsistency
Published
2023-05-27T03:53Z
EPSS history
Timeline
  • 27 MAY 03:53Z
    Improper handling of NTS cookie length that could crash the ntpd-rs server
    cvelistv5