CVE-2023-33192

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

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.20%
Vendor Advisory github.com
Affected: pendulum-project ntpd-rs
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2023-33192?
CVE-2023-33192 has been scored as a high severity vulnerability.
How to fix CVE-2023-33192?
To fix CVE-2023-33192, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-33192 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-33192 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-33192?
CVE-2023-33192 affects pendulum-project ntpd-rs.
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