CVE-2025-58066: Ntpd rs Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-4855-q42w-5vr4
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CVSS 5.3
CWE-406
Published
Advisory Summary

CVE-2025-58066 is a MODERATE (CVSS 5.3) denial of service vulnerability (CWE-406: Insufficient Control of Network Message Volume (Network Amplification)) affecting Ntpd rs libraries in the crates.io ecosystem. The issue involves dos vulnerability in ntpd-rs. Remediation is available by upgrading affected packages to version 1.6.2.

CVE-2025-58066 at a Glance

CVE Identifier CVE-2025-58066
GHSA Identifier GHSA-4855-q42w-5vr4
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-406: Insufficient Control of Network Message Volume (Network Amplification)
Affected Product Ntpd rs
Package Ecosystem crates.io
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2025-58066

To remediate this vulnerability, upgrade all affected Ntpd rs dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

ntpd-rs fixed: 1.6.2 
Upgrade ntpd-rs to 1.6.2
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for ntpd-rs

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-58066, inspect your project dependencies for Ntpd rs:

inspect dependencies for ntpd-rs

Analyze the terminal output to locate any version of Ntpd rs in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.6.2), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-406: Insufficient Control of Network Message Volume (Network Amplification), where the product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor. In Ntpd rs, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

# Summary A denial of service vulnerability was discovered in ntpd-rs where an attacker can induce a message storm between two NTP servers running ntpd-rs. # Details Since ntpd-rs version 1.2.0, when configured as a server, incorrectly responded to all NTP messages sent to the server's port with a time reply, including to responses from other servers. As a consequence, a message with a spoofed IP address of another server could cause two servers running ntpd-rs to continually respond to each other, consuming significant amounts of resources. # Impact Any time server running ntpd-rs with version between 1.2.0 and 1.6.1 inclusive which allows non-NTS traffic is affected. Client-only configurations are not affected. Affected users are recommended to upgrade to version 1.6.2 as soon as possible. # Workarounds Should upgrading not be possible, the impact of the issue can be mitigated by: - Whitelisting access to only IP addresses of clients using the server, using the ignore filter method. - Blocking incoming non-request traffic on the NTP server port using a firewall. - Disabling public access to the vulnerable NTP server - Disabling the server functionality by removing any [server] sections from the configuration. # Acknowledgements The ntpd-rs authors thank Eric Sesterhenn from X41 D-Sec GmbH for finding and reporting this issue.

CVE-2025-58066 Affected Ntpd rs Versions

1 component(s)
Fixed Versions:
1.6.2
Product / Package Ecosystem Affected Versions Fixed Version
ntpd-rs
 crates.io
≥ 1.2.0
< 1.6.2
1.6.2

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-4855-q42w-5vr4
NVD — CVE-2025-58066 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-58066
Security Fix Commit FIX COMMIT
https://github.com/pendulum-project/ntpd-rs/commit/da37cf167736cbd4d7804b1ed7ceb572468298e0
Ntpd rs Source Repository REPOSITORY
https://github.com/pendulum-project/ntpd-rs

Frequently Asked Questions

What is CVE-2025-58066?
CVE-2025-58066 is a security vulnerability in Ntpd rs involving DoS Vulnerability in ntpd-rs under CWE-406: Insufficient Control of Network Message Volume (Network Amplification).
Which Ntpd rs versions are affected?
Affected versions include releases prior to 1.6.2 across affected packages: ntpd-rs.
What version fixes CVE-2025-58066?
Upgrading to 1.6.2 (or the latest patched release for your respective branch) resolves the vulnerability.
Is ntpd-rs affected?
Yes, ntpd-rs is affected in releases prior to 1.6.2. Upgrade your dependency to 1.6.2 or later.
What is the CVSS score of CVE-2025-58066?
CVE-2025-58066 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with CVE-2025-58066?
CVE-2025-58066 is classified under CWE-406: Insufficient Control of Network Message Volume (Network Amplification) (The product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor.).
How can I check crates.io dependencies for CVE-2025-58066?
Run the dependency tree command: 'inspect dependencies for ntpd-rs'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4855-q42w-5vr4",
  "modified" : "2025-08-29T21:58:17Z",
  "published" : "2025-08-29T20:07:27Z",
  "aliases" : [ "CVE-2025-58066" ],
  "summary" : "DoS Vulnerability in ntpd-rs",
  "details" : "# Summary\n\nA denial of service vulnerability was discovered in ntpd-rs where an attacker can induce a message storm between two NTP servers running ntpd-rs.\n\n# Details\n\nSince ntpd-rs version 1.2.0, when configured as a server, incorrectly responded to all NTP messages sent to the server's port with a time reply, including to responses from other servers. As a consequence, a message with a spoofed IP address of another server could cause two servers running ntpd-rs to continually respond to each other, consuming significant amounts of resources.\n\n# Impact\n\nAny time server running ntpd-rs with version between 1.2.0 and 1.6.1 inclusive which allows non-NTS traffic is affected. Client-only configurations are not affected. Affected users are recommended to upgrade to version 1.6.2 as soon as possible.\n\n# Workarounds\n\nShould upgrading not be possible, the impact of the issue can be mitigated by:\n - Whitelisting access to only IP addresses of clients using the server, using the ignore filter method.\n - Blocking incoming non-request traffic on the NTP server port using a firewall.\n - Disabling public access to the vulnerable NTP server\n - Disabling the server functionality by removing any [server] sections from the configuration.\n\n# Acknowledgements\n\nThe ntpd-rs authors thank Eric Sesterhenn from X41 D-Sec GmbH for finding and reporting this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "crates.io",
      "name" : "ntpd-rs"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.2.0"
      }, {
        "fixed" : "1.6.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-4855-q42w-5vr4"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-58066"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pendulum-project/ntpd-rs/commit/da37cf167736cbd4d7804b1ed7ceb572468298e0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pendulum-project/ntpd-rs"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-406" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-08-29T20:07:27Z",
    "nvd_published_at" : "2025-08-29T21:15:36Z"
  }
}