Description
An exploitable unsafe default configuration vulnerability exists in the TURN server function of coTURN prior to version 4.5.0.9. By default, the TURN server runs an unauthenticated telnet admin portal on the loopback interface. This can provide administrator access to the TURN server configuration, which can lead to additional attacks. An attacker who can get access to the telnet port can gain administrator access to the TURN server.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Talos | coTURN | coTURN 4.5.0.5 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | coturn | 4.5.1.0-1 | — |
| Debian 13 | coturn | 4.5.1.0-1 | — |
| Debian 12 | coturn | 4.5.1.0-1 | — |
| Debian 9 | coturn | 4.5.0.5-1+deb9u1 | DSA-4373-1 |
| Debian 8 | coturn | 4.2.1.2-1+deb8u1 | DLA-1671-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | coturn | 4.5.0.7-1ubuntu2.18.04.1 | — |
| Ubuntu 16.04 LTS | coturn | 4.5.0.3-1ubuntu0.2 | — |
Advisories 2
- DSA-4373-1 coturn - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1671-1 coturn - security update Debian Security (DSA / DLA) · Mar 9, 2026