CVE-2018-4059 Missing authorization in coTURN
An attacker with local access can exploit an unauthenticated telnet admin portal to gain administrator control of the coTURN server.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-4059?
CVE-2018-4059 is a medium-severity missing authorization vulnerability in Talos coTURN, published on 21 Mar 2019. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2018-4059?
It affects 1 product.
Products include Coturn Project Coturn.
How do I fix CVE-2018-4059?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2018-4059 being exploited?
There is no known exploitation of CVE-2018-4059 in the wild and no public exploit code.
Other vulnerabilities in Talos coTURN
- CVE-2018-4056 SQL injection in coTURN
- CVE-2026-43994 Coturn: Stack buffer overflow in decode_oauth_token_gcm()
- CVE-2018-4058 Server-side request forgery in coTURN
- CVE-2026-40613 Coturn: Misaligned Memory Access in coturn STUN Attribute Parser (Remote DoS on ARM64)
- CVE-2026-53450 Coturn: IPv4-mapped 127.0.0.1 bypasses default loopback peer protection
Sources
Also known as DEBIAN-CVE-2018-4059, GHSA-7q4q-c7wp-55p8, UBUNTU-CVE-2018-4059.