CVE-2023-50432Network attack vector

Daemon crash via optionless DHCP packet

Published Apr 29, 2024 · Updated Nov 20, 2024

NULL pointer dereference in simple-dhcp-server through ec976d2 allows remote attackers to crash the DHCP daemon with an optionless packet. The free_packet function in dhcp_packet.c dereferences a NULL options pointer when a received DHCP packet contains no option fields. No authentication or user interaction is required; delivery of the malformed network packet terminates the DHCP service.

CVSS severity5.3
Medium
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

NULL pointer dereference in simple-dhcp-server through ec976d2 allows remote attackers to crash the DHCP daemon with an optionless packet. The free_packet function in dhcp_packet.c dereferences a NULL options pointer when a received DHCP packet contains no option fields. No authentication or user interaction is required; delivery of the malformed network packet terminates the DHCP service.

The record

CVE
CVE-2023-50432
Published
Apr 29, 2024
Updated
Nov 20, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 29, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 20, 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?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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