Upstream information

CVE-2025-69217 at MITRE

Description

coturn is a free open source implementation of TURN and STUN Server. Versions 4.6.2r5 through 4.7.0-r4 have a bad random number generator for nonces and port randomization after refactoring. Additionally, random numbers aren't generated with openssl's RAND_bytes but libc's random() (if it's not running on Windows). When fetching about 50 sequential nonces (i.e., through sending 50 unauthenticated allocations requests) it is possible to completely reconstruct the current state of the random number generator, thereby predicting the next nonce. This allows authentication while spoofing IPs. An attacker can send authenticated messages without ever receiving the responses, including the nonce (requires knowledge of the credentials, which is e.g., often the case in IoT settings). Since the port randomization is deterministic given the pseudorandom seed, an attacker can exactly reconstruct the ports and, hence predict the randomization of the ports. If an attacker allocates a relay port, they know the current port, and they are able to predict the next relay port (at least if it is not used before). Commit 11fc465f4bba70bb0ad8aae17d6c4a63a29917d9 contains a fix.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having important severity.

CVSS v3 Scores
CVSS detail CNA (GitHub) SUSE
Base Score 7.7 7.7
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector Network Network
Attack Complexity Low Low
Privileges Required Low Low
User Interaction None None
Scope Changed Changed
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1255744 [IN_PROGRESS]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
SUSE Package Hub 15 SP6
  • coturn >= 4.9.0-bp156.2.3.1
  • coturn-devel >= 4.9.0-bp156.2.3.1
  • coturn-utils >= 4.9.0-bp156.2.3.1
 Patchnames:
openSUSE-2026-143
openSUSE Leap 15.6
  • coturn >= 4.9.0-bp156.2.3.1
  • coturn-devel >= 4.9.0-bp156.2.3.1
  • coturn-utils >= 4.9.0-bp156.2.3.1
 Patchnames:
openSUSE-2026-143
openSUSE Tumbleweed
  • coturn >= 4.9.0-1.1
  • coturn-devel >= 4.9.0-1.1
  • coturn-utils >= 4.9.0-1.1
 Patchnames:
openSUSE-Tumbleweed-2026-10375

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.

Product(s) Source package State
Products past their end of life and not receiving proactive updates anymore.
SUSE Package Hub 15 SP6 coturn Released

SUSE Timeline for this CVE

CVE page created: Tue Dec 30 04:02:24 2025
CVE page last modified: Mon Apr 20 17:26:31 2026