CVE-2026-40613
HighSummary
Coturn to darmowa, otwartoźródłowa implementacja serwera TURN i STUN. W wersjach przed 4.10.0 funkcje parsowania atrybutów STUN/TURN wykonują niebezpieczne rzutowania wskaźników, co prowadzi do błędów odczytu pamięci na architekturach ARM64, powodując awarię procesu turnserver.
Risk Assessment
Atakujący zdalny, nieautoryzowany może spowodować awarię dowolnej instalacji coturn na ARM64, wysyłając jedną spreparowaną paczkę UDP, co może prowadzić do przerw w dostępności usług.
Recommendation
Zaleca się aktualizację coturn do wersji 4.10.0 lub nowszej, aby usunąć tę podatność i zabezpieczyć system przed potencjalnymi atakami.
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Original NVD description (English source)
Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.10.0, the STUN/TURN attribute parsing functions in coturn perform unsafe pointer casts from uint8_t * to uint16_t * without alignment checks. When processing a crafted STUN message with odd-aligned attribute boundaries, this results in misaligned memory reads at ns_turn_msg.c. On ARM64 architectures (AArch64) with strict alignment enforcement, this causes a SIGBUS signal that immediately kills the turnserver process. An unauthenticated remote attacker can crash any ARM64 coturn deployment by sending a single crafted UDP packet. This vulnerability is fixed in 4.10.0.

