CVE-2025-23018

State: Published
Severity: 5.4 Medium
Published: Jan 14, 2025
Updated: Nov 3, 2025
Reserved: Jan 10, 2025

Description

IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N	mitre

Weaknesses

CWE-940 Improper Verification of Source of a Communication Channel

Affected Products

Product	Versions
IPv6IETF	6Affected

References

https://datatracker.ietf.org/doc/html/rfc2473
https://papers.mathyvanhoef.com/usenix2025-tunnels.pdf
https://www.top10vpn.com/research/tunneling-protocol-vulnerability/
https://www.kb.cert.org/vuls/id/199397

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