int(4836)

Boletines de Vulnerabilidades

Suplantación de identidad en GnuTLS

Clasificación de la vulnerabilidad
Propiedad Valor
Nivel de Confianza Oficial
Impacto Confidencialidad
Dificultad Experto
Requerimientos del atacante Acceso remoto sin cuenta a un servicio estandar

Información sobre el sistema
Propiedad Valor
Fabricante afectado GNU/Linux
Software afectado GnuTLS < 2.8.2

Descripción
Se ha descubierto una vulnerabilidad en GnuTLS 2.8. La vulnerabilidad reside en un error en el manejo del carácter '\0' en un nombre de dominio en los campos Common Name (CN) o Subject Alternative Name de un certificado X.509.

Un atacante remoto podría suplantar certificados de servidores SSL arbitrarios válidos mediante un certificado especialmente diseñado emitido por una Autoridad Certificadora en un ataque de hombre en el medio.

Solución



Actualización de software

Red Hat (RHSA-2009:1232-1)
RHEL Desktop Workstation (v. 5 cliente)
Red Hat Desktop (v. 4)
Red Hat Enterprise Linux (v. 5 servidor)
Red Hat Enterprise Linux AS (v. 4)
Red Hat Enterprise Linux AS (v. 4.8.z)
Red Hat Enterprise Linux Desktop (v. 5 cliente)
Red Hat Enterprise Linux ES (v. 4)
Red Hat Enterprise Linux ES (v. 4.8.z)
Red Hat Enterprise Linux EUS (v. 5.3.z servidor)
Red Hat Enterprise Linux WS (v. 4)
https://rhn.redhat.com/

Suse Linux
Las actualizaciones pueden descargarse mediante YAST o del servidor FTP oficial de Suse Linux.

Debian (DSA-1935-1)

Debian Linux 4.0
Source
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls13_1.4.4.orig.tar.gz
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls13_1.4.4-3+etch5.dsc
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls13_1.4.4-3+etch5.diff.gz
Arquitectura independiente:
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-doc_1.4.4-3+etch5_all.deb
alpha (DEC Alpha)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_alpha.deb
amd64 (AMD x86_64 (AMD64))
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_amd64.deb
arm (ARM)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_arm.deb
hppa (HP PA RISC)
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_hppa.deb
i386 (Intel ia32)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_i386.deb
ia64 (Intel ia64)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_ia64.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_ia64.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_ia64.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_ia64.deb
mips (MIPS (Big Endian))
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_mips.deb
mipsel (MIPS (Little Endian))
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_mipsel.deb
powerpc (PowerPC)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_powerpc.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_powerpc.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_powerpc.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_powerpc.deb
s390 (IBM S/390)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_s390.deb
sparc (Sun SPARC/UltraSPARC)
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls-dev_1.4.4-3+etch5_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13-dbg_1.4.4-3+etch5_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls13/gnutls-bin_1.4.4-3+etch5_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls13/libgnutls13_1.4.4-3+etch5_sparc.deb

Debian (DSA-1935-1)

Debian Linux 5.0
Source
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls26_2.4.2-6+lenny2.diff.gz
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls26_2.4.2-6+lenny2.dsc
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls26_2.4.2.orig.tar.gz
Arquitectura independiente:
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-doc_2.4.2-6+lenny2_all.deb
alpha (DEC Alpha)
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_alpha.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_alpha.deb
amd64 (AMD x86_64 (AMD64))
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_amd64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_amd64.deb
arm (ARM)
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_arm.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_arm.deb
armel (ARM EABI)
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_armel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_armel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_armel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_armel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_armel.deb
hppa (HP PA RISC)
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_hppa.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_hppa.deb
i386 (Intel ia32)
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_i386.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_i386.deb
ia64 (Intel ia64)
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_ia64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_ia64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_ia64.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_ia64.deb
mips (MIPS (Big Endian))
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_mips.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_mips.deb
mipsel (MIPS (Little Endian))
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_mipsel.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_mipsel.deb
s390 (IBM S/390)
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_s390.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_s390.deb
sparc (Sun SPARC/UltraSPARC)
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26_2.4.2-6+lenny2_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls26-dbg_2.4.2-6+lenny2_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls26/libgnutls-dev_2.4.2-6+lenny2_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls26/guile-gnutls_2.4.2-6+lenny2_sparc.deb
http://security.debian.org/pool/updates/main/g/gnutls26/gnutls-bin_2.4.2-6+lenny2_sparc.deb

Identificadores estándar
Propiedad Valor
CVE CVE-2009-2730
BID

Recursos adicionales
Red Hat Security Advisory (RHSA-2008:0547-5)
https://rhn.redhat.com/errata/RHSA-2008-0547.html

SUSE Security Advisory (SUSE-SR:2009:015)
http://www.novell.com/linux/security/advisories/2009_15_sr.html

Debian Security Advisory (DSA-1935-1)
http://lists.debian.org/debian-security-announce/2009/msg00258.html

Histórico de versiones
Versión Comentario Fecha
1.0 Aviso emitido 2009-08-27
1.1 Aviso emitido por Suse (SUSE-SR:2009:015) 2009-09-18
1.2 Aviso emitido por Debian (DSA-1935-1) 2009-11-24
1.3 Aviso emitido por Suse (SUSE-SA:2010:004) 2010-03-01

Miembros de

CERT
FIRST
TF-CSIRT
EGC Group
UE
Red Nacional de SOC
Foro Nacional de Ciberseguridad
CSIRT.es
Ministerio de Defensa
CNI
CCN
CCN-CERT