cve/2025/CVE-2025-23018.md

### [CVE-2025-23018](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-23018)
![](https://img.shields.io/static/v1?label=Product&message=IPv6&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=6%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-940%20Improper%20Verification%20of%20Source%20of%20a%20Communication%20Channel&color=brightgreen)

### 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.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/vanhoefm/tunneltester