# CVE-2018-25022: libtoxcore: The Onion module in toxcore before 0.2.2 doesn't restrict which packets can be onion-routed, which allows a remote at...

CVE-2018-25022 is fixed in libtoxcore on 1 platform, first by DEBIAN-CVE-2018-25022, released December 13, 2021. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2018-25022
- Priority: Routine
- CVSS: 3.1 (low)
- EPSS: 0.0156
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 13, 2021

## Description

The Onion module in toxcore before 0.2.2 doesn't restrict which packets can be onion-routed, which allows a remote attacker to discover a target user's IP address (when knowing only their Tox Id) by positioning themselves close to target's Tox Id in the DHT for the target to establish an onion connection with the attacker, guessing the target's DHT public key and creating a DHT node with public key close to it, and finally onion-routing a NAT Ping Request to the target, requesting it to ping the just created DHT node.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libtoxcore Debian 12.15 (bookworm) | 0.2.2-1 | [DEBIAN-CVE-2018-25022](https://patchblox.com/security/data/fix/linux/debian-cve-2018-25022.md) | Dec 13, 2021 |
| Linux | libtoxcore Debian 13.5 (trixie) | 0.2.2-1 | [DEBIAN-CVE-2018-25022](https://patchblox.com/security/data/fix/linux/debian-cve-2018-25022.md) | Dec 13, 2021 |
| Linux | libtoxcore Debian 14 | 0.2.2-1 | [DEBIAN-CVE-2018-25022](https://patchblox.com/security/data/fix/linux/debian-cve-2018-25022.md) | Dec 13, 2021 |

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