Boletines de Vulnerabilidades

int(3976)

Boletines de Vulnerabilidades

Denegación de servicio en Asterisk
Clasificación de la vulnerabilidad
Propiedad	Valor
Nivel de Confianza	Oficial
Impacto	Denegación de Servicio
Dificultad	Principiante
Requerimientos del atacante	Acceso remoto sin cuenta a un servicio estandar
Información sobre el sistema
Propiedad	Valor
Fabricante afectado	Comercial Software
Software afectado	Asterisk Open Source 1.0.x Asterisk Open Source 1.2.x < 1.2.28 Asterisk Open Source 1.4.x < 1.4.19.1 Asterisk Business Edition A.x.x Asterisk Business Edition B.x.x < B.2.5.2 Asterisk Business Edition C.x.x < C.1.8.1 AsteriskNOW < 1.0.3 Asterisk Appliance Developer Kit 0.x.x Asterisk Appliance s800i < 1.1.0.3
Descripción
Se ha encontrado una vulnerabilidad en Asterisk Open Source 1.0.x, 1.2.x en versiones anteriores a la 1.2.28, y 1.4.x en versiones anteriores a la 1.4.19.1; Asterisk Business Edition A.x.x, B.x.x en versiones anteriores a la B.2.5.2, y C.x.x en versiones anteriores a la C.1.8.1; AsteriskNOW en versiones anteriores a la 1.0.3; Asterisk Appliance Developer Kit 0.x.x; y Asterisk Appliance s800i en versiones anteriores a la 1.1.0.3. La vulnerabilidad reside en un error en la validación de respuestas ACK durante los "handshakes" del protocolo IAX2. Un atacante remoto podría causar una denegación de servicio mediante una respuesta ACK falseada especialmente diseñada. Existe un exploit público disponible.
Solución
Actualización de software Debian (DSA-1563-1) Debian Linux 4.0 Source http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg-2etch4.dsc http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg.orig.tar.gz http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg-2etch4.diff.gz Arquitectura independiente http://security.debian.org/pool/updates/main/a/asterisk/asterisk-doc_1.2.13~dfsg-2etch4_all.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-web-vmail_1.2.13~dfsg-2etch4_all.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-config_1.2.13~dfsg-2etch4_all.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-sounds-main_1.2.13~dfsg-2etch4_all.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg-2etch4_all.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-dev_1.2.13~dfsg-2etch4_all.deb alpha (DEC Alpha) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_alpha.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_alpha.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_alpha.deb amd64 (AMD x86_64 (AMD64)) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_amd64.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_amd64.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_amd64.deb arm (ARM) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_arm.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_arm.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_arm.deb hppa (HP PA RISC) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_hppa.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_hppa.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_hppa.deb i386 (Intel ia32) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_i386.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_i386.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_i386.deb ia64 (Intel ia64) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_ia64.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_ia64.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_ia64.deb mips (MIPS (Big Endian)) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_mips.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_mips.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_mips.deb mipsel (MIPS (Little Endian)) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_mipsel.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_mipsel.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_mipsel.deb powerpc (PowerPC) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_powerpc.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_powerpc.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_powerpc.deb s390 (IBM S/390) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_s390.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_s390.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_s390.deb sparc (Sun SPARC/UltraSPARC) http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch4_sparc.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch4_sparc.deb http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch4_sparc.deb
Identificadores estándar
Propiedad	Valor
CVE	CVE-2008-1897
BID
Recursos adicionales
Asterisk Project Security Advisory - AST-2008-006 http://downloads.digium.com/pub/security/AST-2008-006.html Debian Security Advisory (DSA-1563-1) http://lists.debian.org/debian-security-announce/2008/msg00137.html