CVE-2023-29001Network attack vector

Remote crash via recursive IPv6 packet forwarding

Published Nov 27, 2024 · Updated Nov 27, 2024

Uncontrolled recursion in Contiki-NG 4.9 and earlier allows remote attackers to crash an IPv6 host with a crafted source routing header. tcpip_ipv6_output forwards a packet whose computed next hop is a local address, re-entering IPv6 output until the call stack is exhausted. Any attacker able to deliver IPv6 packets to the host needs no authentication or user interaction, and the bounded consequence is a service-interrupting crash.

CVSS severity8.7
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled recursion in Contiki-NG 4.9 and earlier allows remote attackers to crash an IPv6 host with a crafted source routing header. tcpip_ipv6_output forwards a packet whose computed next hop is a local address, re-entering IPv6 output until the call stack is exhausted. Any attacker able to deliver IPv6 packets to the host needs no authentication or user interaction, and the bounded consequence is a service-interrupting crash.

The record

CVE
CVE-2023-29001
Published
Nov 27, 2024
Updated
Nov 27, 2024
Vendor
Contiki-NG
Product
Contiki-NG
Classifications
CWE-674, 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

8.7GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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.

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

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-674Uncontrolled Recursion
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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