Debian Security Advisory

DLA-2522-1 coturn -- LTS security update

Date Reported:
12 Jan 2021
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2020-26262.
More information:

A flaw was discovered in coturn, a TURN and STUN server for VoIP. By default coturn does not allow peers on the loopback addresses (127.x.x.x and ::1). A remote attacker can bypass the protection via a specially crafted request using a peer address of and trick coturn in relaying to the loopback interface. If listening on IPv6 the loopback interface can also be reached by using either [::1] or [::] as the address.

For Debian 9 stretch, this problem has been fixed in version

We recommend that you upgrade your coturn packages.

For the detailed security status of coturn please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: