Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) Affecting coturn/coturn package, versions [4.6.3,4.8.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UNMANAGED-COTURNCOTURN-14724490
- published30 Dec 2025
- disclosed30 Dec 2025
- creditjornlp
Introduced: 30 Dec 2025
CVE-2025-69217 (opens in a new tab)How to fix?
Upgrade coturn/coturn to version 4.8.0 or higher.
Overview
Affected versions of this package are vulnerable to Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) via the turn_random() function. An attacker can predict authentication nonces and relay port allocations by reconstructing the state of the random number generator after making multiple sequential allocation requests. This enables sending authenticated messages while spoofing IP addresses and predicting future relay ports.
Note: This is only exploitable if the attacker knows valid credentials, which is often the case in certain IoT deployments.