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.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c9fb3f5806 advisory.

    - Backport upstream patches for CVE-2025-69217 (#2425955)

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.

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-c75d08ab90 advisory.

    - Backport upstream patches for CVE-2025-69217 (#2425955)

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.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2025-69217)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
282627	Fedora 43 : coturn (2026-c9fb3f5806)	Nessus	Fedora Local Security Checks	high
282622	Fedora 42 : coturn (2026-c75d08ab90)	Nessus	Fedora Local Security Checks	high
281680	Linux Distros Unpatched Vulnerability : CVE-2025-69217	Nessus	Misc.	high

Detections

Analytics

CVE-2025-69217

high

Tenable Plugins

high

high

high