Detections
Analytics
Alpine: multiple coturn packages: security update to 4.5.2-r0
high Tenable Cloud Security Plugin ID 403912
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Coturn is free open source implementation of TURN and STUN Server. Coturn before version 4.5.2 by default
does not allow peers to connect and relay packets to loopback addresses in the range of `127.x.x.x`.
However, it was observed that when sending a `CONNECT` request with the `XOR-PEER-ADDRESS` value of
`0.0.0.0`, a successful response was received and subsequently, `CONNECTIONBIND` also received a
successful response. Coturn then is able to relay packets to the loopback interface. Additionally, when
coturn is listening on IPv6, which is default, the loopback interface can also be reached by making use of
either `[::1]` or `[::]` as the peer address. By using the address `0.0.0.0` as the peer address, a
malicious user will be able to relay packets to the loopback interface, unless `--denied-peer-ip=0.0.0.0`
(or similar) has been specified. Since the default configuration implies that loopback peers are not
allowed, coturn administrators may choose to not set the `denied-peer-ip` setting. The issue patched in
version 4.5.2. As a workaround the addresses in the address block `0.0.0.0/8`, `[::1]` and `[::]` should
be denied by default unless `--allow-loopback-peers` has been specified. (CVE-2020-26262)
See Also
Plugin Details
Severity: High
ID: 403912
Version: Revision 1.27
Type: Local
Published: 10/31/2023
Updated: 7/2/2026
Supported Sensors: Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 2.3
Percentile: 8.69
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
Exploit Available: true
Exploit Ease: Exploits are available
Vulnerability Publication Date: 1/11/2021
Reference Information
CVE: CVE-2020-26262