CVE-2024-24199Network attack vector

Service interruption via unaligned DNS buffer write

Published Jun 6, 2024 · Updated Mar 13, 2025

Undefined behavior in pymumu SmartDNS commit 54b4dc allows remote attackers to interrupt the DNS service via crafted DNS traffic. The dns.c writer casts a one-byte-aligned output-buffer address to unsigned short and stores a two-byte value through it, causing an unaligned write. No authentication or user interaction is required; exploitation is limited to service availability, and the upstream report does not document code execution or data exposure.

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

Undefined behavior in pymumu SmartDNS commit 54b4dc allows remote attackers to interrupt the DNS service via crafted DNS traffic. The dns.c writer casts a one-byte-aligned output-buffer address to unsigned short and stores a two-byte value through it, causing an unaligned write. No authentication or user interaction is required; exploitation is limited to service availability, and the upstream report does not document code execution or data exposure.

The record

CVE
CVE-2024-24199
Published
Jun 6, 2024
Updated
Mar 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. Mar 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
7.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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.

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

Technologies

Your stack

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Your stack

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