Improper handling of NTS cookie length that could crash the ntpd-rs server
Published May 27, 2023
7.5
HIGHCVSS 3.1
EPSS 0.71%
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.
Affected products
-
- Version >= 0.3.0, < 0.3.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Pendulum-Project | Ntpd-RS | n/a |
|
- ≥ 0.3.0 · < 0.3.3
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Jan 14, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2023-2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (9 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.71% (0.00708) | 51.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.71% (0.00708) | 48.44th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.42% (0.00422) | 59.97th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.14% (0.00138) | 50.99th | v3 (v2023.03.01) |
| Jun 28, 2024 | 0.13% (0.00125) | 47.48th | v3 (v2023.03.01) |
| Jun 2, 2024 | 0.11% (0.00111) | 44.39th | v3 (v2023.03.01) |
| Apr 26, 2024 | 0.07% (0.00065) | 27.78th | v3 (v2023.03.01) |
| Jun 3, 2023 | 0.05% (0.00046) | 13.99th | v3 (v2023.03.01) |
| May 27, 2023 | 0.04% (0.00043) | 7.04th | v3 (v2023.03.01) |
References (5)
- https://github.com/advisories/GHSA-qwhm-h7v3-mrjx Advisory
- https://github.com/pendulum-project/ntpd-rs/pull/752 x_refsource_MISCPatch
- https://github.com/pendulum-project/ntpd-rs/releases/tag/v0.3.3
- https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjx x_refsource_CONFIRMMitigationVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2023-33192
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-qwhm-h7v3-mrjx | Advisory | |
| https://github.com/pendulum-project/ntpd-rs/pull/752 | x_refsource_MISCPatch | |
| https://github.com/pendulum-project/ntpd-rs/releases/tag/v0.3.3 | ||
| https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-qwhm-h7v3-mrjx | x_refsource_CONFIRMMitigationVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2023-33192 |
Change history (0)
No recorded changes yet.