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Common Weakness Enumeration

CWE-406

Allowed-with-Review

Insufficient Control of Network Message Volume (Network Amplification)

Abstraction: Class · Status: Incomplete

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.

37 vulnerabilities reference this CWE, most recent first.

CVE-2021-38429 (GCVE-0-2021-38429)

Vulnerability from cvelistv5 – Published: 2022-05-05 15:26 – Updated: 2025-04-16 16:22
VLAI
Title
OCI OpenDDS Secure Network Amplification
Summary
OCI OpenDDS versions prior to 3.18.1 are vulnerable when an attacker sends a specially crafted packet to flood target devices with unwanted traffic, which may result in a denial-of-service condition and information exposure.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-16 15:52 UTC
CWE
  • CWE-406 - Insufficient Control of Network Message Volume (Network Amplification)
References
URL Tags
https://www.cisa.gov/uscert/ics/advisories/icsa-2… x_refsource_CONFIRM
https://opendds.org/ x_refsource_CONFIRM
Impacted products
Vendor Product Version
OCI OpenDDS Affected: unspecified , < 3.18.1 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2021-38425 (GCVE-0-2021-38425)

Vulnerability from cvelistv5 – Published: 2022-05-05 15:24 – Updated: 2025-04-16 16:23
VLAI
Title
eProsima Fast DDS Network Amplification
Summary
eProsima Fast DDS versions prior to 2.4.0 (#2269) are susceptible to exploitation when an attacker sends a specially crafted packet to flood a target device with unwanted traffic, which may result in a denial-of-service condition and information exposure.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-16 15:56 UTC
CWE
  • CWE-406 - Insufficient Control of Network Message Volume (Network Amplification)
References
Impacted products
Vendor Product Version
eProsima Fast DDS Affected: unspecified , < 2.4.0 (#2269) (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2021-38135 (GCVE-0-2021-38135)

Vulnerability from cvelistv5 – Published: 2024-11-22 15:34 – Updated: 2024-11-25 18:11
VLAI
Title
Possible External service interaction Vulnerability in OpenText iManager
Summary
Possible External Service Interaction attack in iManager has been discovered in OpenText™ iManager 3.2.6.0000.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-25 18:09 UTC
CWE
  • CWE-918 - Server-Side Request Forgery (SSRF)
  • CWE-406 - Insufficient Control of Network Message Volume (Network Amplification)
Impacted products
Vendor Product Version
OpenText iManager Affected: 3.0.0 , ≤ 3.2.5.0000 (rpm, exe)
Create a notification for this product.
opentext imanager Affected: 3.0.0 , ≤ 3.2.5.0000 (rpm)
    cpe:2.3:a:opentext:imanager:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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CVE-2021-4234 (GCVE-0-2021-4234)

Vulnerability from cvelistv5 – Published: 2022-07-06 19:10 – Updated: 2024-08-03 17:23
VLAI
Summary
OpenVPN Access Server 2.10 and prior versions are susceptible to resending multiple packets in a response to a reset packet sent from the client which the client again does not respond to, resulting in a limited amplification attack.
Severity
No CVSS data available.
CWE
  • CWE-406 - Insufficient Control of Network Message Volume
References
Impacted products
Vendor Product Version
n/a OpenVPN Access Server Affected: 2.10 and prior version
Show details on NVD website

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CVE-2020-10772 (GCVE-0-2020-10772)

Vulnerability from cvelistv5 – Published: 2020-11-27 17:40 – Updated: 2024-08-04 11:14
VLAI
Summary
An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414. Vulnerable versions of Unbound could still amplify an incoming query into a large number of queries directed to a target, even with a lower amplification ratio compared to versions of Unbound that shipped before the mentioned erratum. This issue is about the incomplete fix for CVE-2020-12662, and it does not affect upstream versions of Unbound.
Severity
No CVSS data available.
CWE
References
Impacted products
Vendor Product Version
n/a unbound Affected: unbound-1.6.6-5.el7_8
Show details on NVD website

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CVE-2019-14850 (GCVE-0-2019-14850)

Vulnerability from cvelistv5 – Published: 2021-03-18 18:56 – Updated: 2024-08-05 00:26
VLAI
Summary
A denial of service vulnerability was discovered in nbdkit 1.12.7, 1.14.1 and 1.15.1. An attacker could connect to the nbdkit service and cause it to perform a large amount of work in initializing backend plugins, by simply opening a connection to the service. This vulnerability could cause resource consumption and degradation of service in nbdkit, depending on the plugins configured on the server-side.
Severity
No CVSS data available.
CWE
References
Impacted products
Vendor Product Version
n/a nbdkit Affected: nbdkit 1.12.7, nbdkit 1.14.1, nbdkit 1.15.1
Show details on NVD website

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CVE-2014-125036 (GCVE-0-2014-125036)

Vulnerability from cvelistv5 – Published: 2023-01-02 17:11 – Updated: 2024-08-06 14:10
VLAI
Title
drybjed ansible-ntp main.yml amplification
Summary
A vulnerability, which was classified as problematic, has been found in drybjed ansible-ntp. Affected by this issue is some unknown functionality of the file meta/main.yml. The manipulation leads to insufficient control of network message volume. The attack can only be done within the local network. The complexity of an attack is rather high. The exploitation is known to be difficult. The patch is identified as ed4ca2cf012677973c220cdba36b5c60bfa0260b. It is recommended to apply a patch to fix this issue. VDB-217190 is the identifier assigned to this vulnerability.
CWE
  • CWE-406 - Insufficient Control of Network Message Volume
References
URL Tags
https://vuldb.com/?id.217190 vdb-entrytechnical-description
https://vuldb.com/?ctiid.217190 signaturepermissions-required
https://github.com/drybjed/ansible-ntp/commit/ed4… patch
Impacted products
Show details on NVD website

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GHSA-3JGF-C787-2JMH

Vulnerability from github – Published: 2026-08-05 09:31 – Updated: 2026-08-05 18:31
VLAI
Details

It was not possible to govern the rate at which the broker would respond to an echo flow, enabling an authenticated attacker to cause excessive resource usage and potential denial of service.

This issue affects Apache Qpid Broker-J: through 10.0.1.

Users are recommended to upgrade to version 10.1.0, which fixes the issue.

Show details on source website

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    "severity": "MODERATE"
  },
  "details": "It was not possible to govern the rate at which the broker would respond to an echo flow, enabling an authenticated attacker to cause excessive resource usage and potential denial of service.\n\nThis issue affects Apache Qpid Broker-J: through 10.0.1.\n\nUsers are recommended to upgrade to version 10.1.0, which fixes the issue.",
  "id": "GHSA-3jgf-c787-2jmh",
  "modified": "2026-08-05T18:31:30Z",
  "published": "2026-08-05T09:31:15Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68080"
    },
    {
      "type": "WEB",
      "url": "https://lists.apache.org/thread/tcnrv5nhmnsrzz92o4owxgycro6llt57"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/08/04/20"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

GHSA-4855-Q42W-5VR4

Vulnerability from github – Published: 2025-08-29 20:07 – Updated: 2025-08-29 21:58
VLAI
Summary
DoS Vulnerability in ntpd-rs
Details

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.

Show details on source website

{
  "affected": [
    {
      "package": {
        "ecosystem": "crates.io",
        "name": "ntpd-rs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.2.0"
            },
            {
              "fixed": "1.6.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-58066"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-406"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-08-29T20:07:27Z",
    "nvd_published_at": "2025-08-29T21:15:36Z",
    "severity": "MODERATE"
  },
  "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\u0027s 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.",
  "id": "GHSA-4855-q42w-5vr4",
  "modified": "2025-08-29T21:58:17Z",
  "published": "2025-08-29T20:07:27Z",
  "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"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "DoS Vulnerability in ntpd-rs"
}

GHSA-5G4F-VG94-WPXH

Vulnerability from github – Published: 2026-09-09 15:35 – Updated: 2026-09-09 15:35
VLAI
Details

PocketMine-MP versions before 5.39.2 contain a network amplification vulnerability in ActorEventPacket handling that allows clients to trigger consuming animations for all visible players. Attackers can send crafted ActorEventPacket messages to spam animation events to other clients and waste server CPU and memory resources.

Show details on source website

{
  "affected": [],
  "aliases": [
    "CVE-2026-86202"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-406"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-09T14:17:21Z",
    "severity": "MODERATE"
  },
  "details": "PocketMine-MP versions before 5.39.2 contain a network amplification vulnerability in ActorEventPacket handling that allows clients to trigger consuming animations for all visible players. Attackers can send crafted ActorEventPacket messages to spam animation events to other clients and waste server CPU and memory resources.",
  "id": "GHSA-5g4f-vg94-wpxh",
  "modified": "2026-09-09T15:35:11Z",
  "published": "2026-09-09T15:35:11Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-7hmv-4j2j-pp6f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86202"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pmmp/PocketMine-MP/commit/aeea1150a772a005b92bd418366f1b7cf1a91ab5"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/pocketmine-mp-before-5.39.2-network-amplification-via-actoreventpacket"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

Mitigation
Architecture and Design

Strategy: Separation of Privilege

An application must make network resources available to a client commensurate with the client's access level.

Mitigation
Policy

Define a clear policy for network resource allocation and consumption.

Mitigation
Implementation

An application must, at all times, keep track of network resources and meter their usage appropriately.

No CAPEC attack patterns related to this CWE.