CVE-2024-30249Known exploitationNetwork attack vector

Unauthenticated UDP amplification via reliable handshake replies

Published Apr 4, 2024 · Updated Aug 21, 2024

Denial of service in CloudburstMC Network before 1.0.0.CR1-20240330.101522-15 allows remote attackers to amplify UDP traffic. RakServerOnlineInitialHandler marks the pre-authentication Connection Request Accepted packet as reliable, caches it, and honors attacker-selected NAK ranges. A spoofable UDP client can request thousands of retransmissions before address ownership is verified, directing reflected traffic at a third party or provoking suspension of the library host.

CVSS severity8.6
High
EPSS probability0.61%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in CloudburstMC Network before 1.0.0.CR1-20240330.101522-15 allows remote attackers to amplify UDP traffic. RakServerOnlineInitialHandler marks the pre-authentication Connection Request Accepted packet as reliable, caches it, and honors attacker-selected NAK ranges. A spoofable UDP client can request thousands of retransmissions before address ownership is verified, directing reflected traffic at a third party or provoking suspension of the library host.

The record

CVE
CVE-2024-30249
Published
Apr 4, 2024
Updated
Aug 21, 2024
Vendor
CloudburstMC
Product
Network
Classifications
CWE-770, T1498.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 24, 2024Exploitation reportedActive RakNet amplification against Geyser instances
  2. Apr 4, 2024CVE publishedPublication date reported by the CVE source.
  3. Aug 21, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <1.0.0.CR1-20240330.101522-15
  2. Affected versionversion=< 1.0.0.CR1-20240330.101522-15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CloudburstMC · Networkversion=0 <1.0.0.CR1-20240330.101522-15; version=< 1.0.0.CR1-20240330.101522-15

Published CVSS scores

8.6GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1498.002Network Denial of Service: Reflection Amplification

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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