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CVE-2023-33192

23
FAUCET Score

CVE-2023-33192 affects ntpd-rs, an NTP implementation in Rust, due to improper validation of NTS cookie lengths in received packets. An unauthenticated attacker can crash the server by sending a specially crafted NTP packet with a short NTS cookie, or if the server is not configured for NTS. This vulnerability has a CVSS score of 7.5 (High), indicating a network-based attack with low complexity and high impact on availability. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage. A patch was released in version 0.3.3.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.3.0, < 0.3.3CPE matchmatch criteria
cpe:2.3:a:tweedegolf:ntpd-rs:*:*:*:*:*:rust:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 26th percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
rustpatch availablevia ghsa
Product: ntpdFixed in: 0.3.3

Vendor Advisories (1)

rustGHSA-qwhm-h7v3-mrjxhigh

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

May 25, 2023

References

github.com / pendulum-project/ntpd-rs/pull/752
Patch
github.com / pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjx
MitigationVendor Advisory