CVE-2025-57767

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 response's WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 401 response being sent, the get_authorization_header() function in res_pjsip_authenticator_digest will return a NULL. This wasn't being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 response's WWW-Authenticate header, or an Authorization header with an incorrect realm was received without a previous 401 response being sent, the get_authorization_header() function in res_pjsip_authenticator_digest will return a NULL. This wasn't being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.

Asterisk es una centralita privada y un kit de herramientas de telefonía de código abierto. Antes de las versiones 20.15.2, 21.10.2 y 22.5.2, si se recibe una solicitud SIP con una cabecera de autorización que contiene un *realm* que no estaba en la cabecera WWW-Authenticate de una respuesta 401 anterior, o si se recibe una cabecera de autorización con un *realm* incorrecto sin que se haya enviado una respuesta 401 anterior, la función 'get_authorization_header()' en 'res_pjsip_authenticator_digest' devolverá un valor NULL. Esto no se estaba verificando antes de intentar obtener el algoritmo de *digest* de la cabecera, lo que provoca un SEGV. Este problema ha sido parcheado en las versiones 20.15.2, 21.10.2 y 22.5.2. No hay soluciones alternativas.