CVE-2024-42643Public exploitNetwork attack vector

Unauthenticated service crash via misaligned packet access

Published Oct 22, 2024 · Updated Oct 23, 2024

Integer overflow in fast_ping.c in pymumu SmartDNS Release46 allows remote attackers to crash the DNS service through DNS requests. The reported failure occurs when fast_ping.c dereferences a misaligned struct fast_ping_packet member at line 1598 during speed checks. No authentication or user interaction is required; successful exploitation aborts the process and interrupts DNS resolution.

CVSS severity7.5
High
EPSS probability0.58%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in fast_ping.c in pymumu SmartDNS Release46 allows remote attackers to crash the DNS service through DNS requests. The reported failure occurs when fast_ping.c dereferences a misaligned struct fast_ping_packet member at line 1598 during speed checks. No authentication or user interaction is required; successful exploitation aborts the process and interrupts DNS resolution.

The record

CVE
CVE-2024-42643
Published
Oct 22, 2024
Updated
Oct 23, 2024
Vendor
pymumu
Product
SmartDNS
Classifications
CWE-190, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 23, 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=46

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

pymumu · SmartDNSversion=46

Published CVSS scores

7.5CISA-ADPCVSS: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

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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 exploitPublished

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

Public exploit references

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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