CyberRota Analysis
AI-GeneratedCoturn versions prior to 4.17.0 are vulnerable due to a flaw in the turnports_allocate_even() function, which incorrectly marks unused odd sibling ports as taken during allocation requests. This allows authenticated clients to exhaust the relay port pool, leading to allocation failures and STUN error 508. Organizations using Coturn should prioritize upgrading to version 4.17.0 to mitigate the risk of service disruption.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.