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Fedora 43 : coturn (2026-1adc5f1ef8)

high Nessus Plugin ID 310215

Synopsis

The remote Fedora host is missing one or more security updates.

Description

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1adc5f1ef8 advisory.

 # Coturn 4.10.0

 ## Performance
 * Add Linux-only `recvmmsg` client receive path for DTLS/UDP listener
 * Skip response buffer allocation for STUN indications
 * Remove mutex from per-thread `super_memory` allocator
 * Eliminate mutex and reduce copies on auth message dispatch
 * Replace `mutex_bps` with lock-free atomics for bandwidth tracking
 * Remove unused mutex from `ur_map` structure
 * WebRTC Auth optimization path
 * Improve worst case scenario - avoid memory allocation

 ## Memory issues
 * Fix null pointer dereferences in `post_parse()`
 * Fix stack buffer overflow in OAuth token decoding
 * Fix `uint16_t` truncation overflow in `stun_get_message_len_str()`
 * Initialize variables before use

 ## Security
 * CVE-2026-40613 Misaligned Memory Access STUN Attribute Parser

 ## General Improvements
 * Disable reason string in response messages to reduce amplification factor
 * Keep only `NEV_UDP_SOCKET_PER_THREAD` network engine
 * Replace perror with logging
 * Extend seed corpus and add more fuzzing scenarios
 * Update config and Readme files about deprecated TLSv1/1.1
 * Restore RFC 3489 (old STUN) backward compatibility broken since 4.7.0
 * Change port identifiers to use `uint16_t`
 * Fixes: `run_tests.sh` and no db
 * Improve `PostgreSQL.md` clarity
 * Add session usage reporting callback to TURN database driver
 * CLI interface is disabled by default


Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected coturn package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2026-1adc5f1ef8

Plugin Details

Severity: High

ID: 310215

File Name: fedora_2026-1adc5f1ef8.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/25/2026

Updated: 4/25/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-40613

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:coturn, cpe:/o:fedoraproject:fedora:43

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/16/2026

Vulnerability Publication Date: 4/16/2026

Reference Information

CVE: CVE-2026-40613