CVE-2026-45809
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-121
Desbordamiendo de búfer basado en pila (Stack)
Fecha de publicación:
05/08/2026
Última modificación:
05/08/2026
Descripción
*** Pendiente de traducción *** OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Versions prior to 3.6.6 and 4.0.0-rc1 contain a denial of service vulnerability in the watcherinfo generation functionality. An attacker can create an oversized watcher entry by sending a SUBSCRIBE Event: presence request with a long From URI, and then trigger presence.winfo watcherinfo XML generation for the same presentity. OpenSIPS copies the stored watcher URI into a fixed-size stack buffer, overflowing it and crashing the process. A remote attacker can crash an OpenSIPS worker in deployments that expose handle_subscribe() and allow watcherinfo (presence.winfo) generation. The issue is configuration-dependent because the presence and presence_xml modules must be loaded and SUBSCRIBE routing must be reachable. This issue has been fixed in versions 3.6.6 and 4.0.0-rc1.
Impacto
Puntuación base 4.0
8.70
Gravedad 4.0
ALTA
Referencias a soluciones, herramientas e información
- https://github.com/OpenSIPS/opensips/commit/c5970d3ee25b457ad2d78fe6e9662a12dae577cd
- https://github.com/OpenSIPS/opensips/commit/dd86461b71ff4a4f5194205896ae5f48f144240d
- https://github.com/OpenSIPS/opensips/security/advisories/GHSA-gx83-2gh8-7v56
- https://github.com/OpenSIPS/opensips/security/advisories/GHSA-gx83-2gh8-7v56