CVE-2024-24198Network attack vector

Remote service crash via misaligned socket-address access

Published Jun 6, 2024 · Updated Feb 13, 2025

Improper memory alignment in SmartDNS commit 54b4dc allows remote attackers to crash the DNS service through crafted DNS traffic. In src/util.c, a sockaddr pointer is cast directly to sockaddr_storage even when the supplied address lacks the latter type's eight-byte alignment, so member access invokes undefined behavior. No authentication or user interaction is required; a reachable DNS listener can terminate, while code execution is not established by the published CVSS impacts.

CVSS severity7.5
High
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper memory alignment in SmartDNS commit 54b4dc allows remote attackers to crash the DNS service through crafted DNS traffic. In src/util.c, a sockaddr pointer is cast directly to sockaddr_storage even when the supplied address lacks the latter type's eight-byte alignment, so member access invokes undefined behavior. No authentication or user interaction is required; a reachable DNS listener can terminate, while code execution is not established by the published CVSS impacts.

The record

CVE
CVE-2024-24198
Published
Jun 6, 2024
Updated
Feb 13, 2025
Vendor
pymumu
Product
SmartDNS
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 6, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=54b4dc

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pymumu · SmartDNSversion=54b4dc

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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.

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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 exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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