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Debian DSA-4829-1 : coturn - security update

high Nessus Plugin ID 144866

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Synopsis

The remote Debian host is missing a security-related update.

Description

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 '0.0.0.0' 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.

Solution

Upgrade the coturn packages.

For the stable distribution (buster), this problem has been fixed in version 4.5.1.1-1.1+deb10u2.

See Also

https://security-tracker.debian.org/tracker/source-package/coturn

https://packages.debian.org/source/buster/coturn

https://www.debian.org/security/2021/dsa-4829

Plugin Details

Severity: High

ID: 144866

File Name: debian_DSA-4829.nasl

Version: 1.4

Type: local

Agent: unix

Published: 1/12/2021

Updated: 1/30/2024

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2020-26262

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:coturn, cpe:/o:debian:debian_linux:10.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 1/11/2021

Vulnerability Publication Date: 1/13/2021

Reference Information

CVE: CVE-2020-26262

DSA: 4829