CVE-2024-47181Network attack vector

Device crash via unaligned RPL option read

Published Nov 27, 2024 · Updated Nov 27, 2024

Denial of service in Contiki-NG 4.9 and earlier allows remote attackers to crash devices with a malformed IPv6 RPL option. The rpl_ext_header_hbh_update function reads a 16-bit value from an odd address when odd-length padding precedes the RPL option. Exploitation requires either RPL implementation to be enabled and joined to an RPL instance; the resulting crash is architecture-dependent.

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

Denial of service in Contiki-NG 4.9 and earlier allows remote attackers to crash devices with a malformed IPv6 RPL option. The rpl_ext_header_hbh_update function reads a 16-bit value from an odd address when odd-length padding precedes the RPL option. Exploitation requires either RPL implementation to be enabled and joined to an RPL instance; the resulting crash is architecture-dependent.

The record

CVE
CVE-2024-47181
Published
Nov 27, 2024
Updated
Nov 27, 2024
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-704, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 27, 2024CVE publishedPublication date reported by the CVE source.
  2. Nov 27, 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 <=4.9
  2. Affected versionversion=<= 4.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Contiki-NG · Contiki-NGversion=0 <=4.9; version=<= 4.9

Published CVSS scores

7.5GitHubCVSS: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.

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

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

CWE-704Incorrect Type Conversion or Cast
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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