Triton: Unprotected Primary Channel
CVE-2023-30859 is a critical-severity unprotected primary channel vulnerability in Triton from Tritonmc, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected Triton versions: < 3.8.4. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 1.07% chance of exploitation within 30 days, higher than 65% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of Triton you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on github.com for workarounds and exact fixed builds.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.2 | High | CNA (github.com) |
| CVSS 3.1 | 9.8 | Critical | NVD |
Official description
Triton is a Minecraft plugin for Spigot and BungeeCord that helps you translate your Minecraft server. The CustomPayload packet allows you to execute commands on the spigot/bukkit console. When you enable bungee mode in the config it will enable the bungee bridge and the server will begin to broadcast the 'triton:main' plugin channel. Using this plugin channel you are able to send a payload packet containing a byte (2) and a string (any spigot command). This could be used to make yourself a server operator and be used to extract other user information through phishing (pretending to be an admin), many servers use essentials so the /geoip command could be available to them, etc. This could also be modified to allow you to set the servers language, set another players language, etc. This issue affects those who have bungee enabled in config. This issue has been fixed in version 3.8.4.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Unprotected Primary Channel
The product uses a primary channel for administration or restricted functionality, but it does not properly protect the channel.
How developers prevent this class of flaw
- Do not expose administrative functionality on the user UI.
- Protect the administrative/restricted functionality with a strong authentication mechanism.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: poc, automatable: yes, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Advisories
Patches and release notes
- github.com/tritonmc/Triton/releases/tag/v3.8.4Release Notes
Spotted an error? Tell us.