CVE-2025-23018

MEDIUM5.4

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

Published Jan 14, 2025

Modified 2 months ago

No fix available

Details

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.

References

WEBhttps://datatracker.ietf.org/doc/html/rfc2473 WEBhttps://papers.mathyvanhoef.com/usenix2025-tunnels.pdf ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2025-23018 WEBhttps://www.kb.cert.org/vuls/id/199397 WEBhttps://www.top10vpn.com/research/tunneling-protocol-vulnerability/

CVSS Analysis

CVSS v3.1

5.4

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

HighAC:H

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

ChangedS:C

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

NoneA:N

5.4/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Weakness Type (CWE)

Other

CWE-940

Ecosystems

Timeline

PublishedJan 14, 2025

ModifiedNov 3, 2025