Vulnerability in Pendulum-Project Ntpd-Rs
CVE-2023-33192
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Pendulum-Project Ntpd-Rs — versions >= 0.3.0, < 0.3.3
- Tweedegolf Ntpd-Rs
Weakness classification (CWE)
References
- github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjx (Mitigation, Vendor Advisory)
- github.com/pendulum-project/ntpd-rs/pull/752 (Patch)
Frequently asked questions
- What is CVE-2023-33192?
- CVE-2023-33192 is a high-severity vulnerability in Pendulum-Project Ntpd-Rs, classified under Improper Handling of Length Parameter Inconsistency. CVSS score: 7.5/10. Published 2023-05-27.
- How severe is CVE-2023-33192?
- High severity. CVSS v3 base score is 7.5 out of 10.