int(2655)

Boletines de Vulnerabilidades


Denegación de servicio en Sendmail

Clasificación de la vulnerabilidad

Propiedad Valor
Nivel de Confianza Oficial
Impacto Denegación de Servicio
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 Sendmail

Descripción

Se ha descubierto una vulnerabilidad en Sendmail. La vulnerabilidad reside en un error al manejar ciertos mensajes con líneas de cabecera especialmente largas lo que podría causar un error al intentar acceder a un puntero ya liberado (use-after-free bug).

Un atacante podría causar una denegación de servicio.

Solución



Actualización de software

OpenBSD
OpenBSD 3.8
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.8/common/010_sendmail3.patch
OpenBSD 3.9
ftp://ftp.openbsd.org/pub/OpenBSD/patches/3.9/common/005_sendmail3.patch

Debian

Debian Linux 3.1
Source
http://security.debian.org/pool/updates/main/s/sendmail/sendmail_8.13.4-3sarge3.dsc
http://security.debian.org/pool/updates/main/s/sendmail/sendmail_8.13.4-3sarge3.diff.gz
http://security.debian.org/pool/updates/main/s/sendmail/sendmail_8.13.4.orig.tar.gz
Architecture independent
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-base_8.13.4-3sarge3_all.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-cf_8.13.4-3sarge3_all.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-doc_8.13.4-3sarge3_all.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail_8.13.4-3sarge3_all.deb
Alpha
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_alpha.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_alpha.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_alpha.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_alpha.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_alpha.deb
AMD64
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_amd64.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_amd64.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_amd64.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_amd64.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_amd64.deb
ARM
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_arm.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_arm.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_arm.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_arm.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_arm.deb
HP Precision
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_hppa.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_hppa.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_hppa.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_hppa.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_hppa.deb
Intel IA-32
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_i386.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_i386.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_i386.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_i386.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_i386.deb
Intel IA-64
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_ia64.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_ia64.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_ia64.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_ia64.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_ia64.deb
Motorola 680x0
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_m68k.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_m68k.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_m68k.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_m68k.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_m68k.deb
Big endian MIPS
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_mips.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_mips.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_mips.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_mips.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_mips.deb
Little endian MIPS
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_mipsel.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_mipsel.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_mipsel.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_mipsel.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_mipsel.deb
PowerPC
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_powerpc.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_powerpc.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_powerpc.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_powerpc.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_powerpc.deb
IBM S/390
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_s390.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_s390.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_s390.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_s390.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_s390.deb
Sun Sparc
http://security.debian.org/pool/updates/main/s/sendmail/libmilter-dev_8.13.4-3sarge3_sparc.deb
http://security.debian.org/pool/updates/main/s/sendmail/libmilter0_8.13.4-3sarge3_sparc.deb
http://security.debian.org/pool/updates/main/s/sendmail/rmail_8.13.4-3sarge3_sparc.deb
http://security.debian.org/pool/updates/main/s/sendmail/sendmail-bin_8.13.4-3sarge3_sparc.deb
http://security.debian.org/pool/updates/main/s/sendmail/sensible-mda_8.13.4-3sarge3_sparc.deb

Mandriva

Corporate Server 3.0
X86
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/3.0/RPMS/sendmail-8.12.11-1.3.C30mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/3.0/RPMS/sendmail-cf-8.12.11-1.3.C30mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/3.0/RPMS/sendmail-devel-8.12.11-1.3.C30mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/3.0/RPMS/sendmail-doc-8.12.11-1.3.C30mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/corporate/3.0/SRPMS/sendmail-8.12.11-1.3.C30mdk.src.rpm
X86_64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/3.0/RPMS/sendmail-8.12.11-1.3.C30mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/3.0/RPMS/sendmail-cf-8.12.11-1.3.C30mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/3.0/RPMS/sendmail-devel-8.12.11-1.3.C30mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/3.0/RPMS/sendmail-doc-8.12.11-1.3.C30mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/corporate/3.0/SRPMS/sendmail-8.12.11-1.3.C30mdk.src.rpm

Multi Network Firewall 2.0
X86
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/mnf/2.0/RPMS/sendmail-8.12.11-1.3.M20mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/mnf/2.0/RPMS/sendmail-cf-8.12.11-1.3.M20mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/mnf/2.0/SRPMS/sendmail-8.12.11-1.3.M20mdk.src.rpm

Mandrivalinux 2006
X86
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/2006.0/RPMS/sendmail-8.13.4-6.3.20060mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/2006.0/RPMS/sendmail-cf-8.13.4-6.3.20060mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/2006.0/RPMS/sendmail-devel-8.13.4-6.3.20060mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/2006.0/RPMS/sendmail-doc-8.13.4-6.3.20060mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/2006.0/SRPMS/sendmail-8.13.4-6.3.20060mdk.src.rpm
X86_64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/2006.0/RPMS/sendmail-8.13.4-6.3.20060mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/2006.0/RPMS/sendmail-cf-8.13.4-6.3.20060mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/2006.0/RPMS/sendmail-devel-8.13.4-6.3.20060mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/2006.0/RPMS/sendmail-doc-8.13.4-6.3.20060mdk.x86_64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/x86_64/2006.0/SRPMS/sendmail-8.13.4-6.3.20060mdk.src.rpm

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

Sun(102664)
Solaris 9 / SPARC / patch 113575-08
Solaris 9 / x86 / patch 114137-07
Solaris 10 / SPARC / patch 125011-01
Solaris 10 / x86 / patch 125012-01
http://sunsolve.sun.com/pub-cgi/show.pl?target=patchpage

Identificadores estándar

Propiedad Valor
CVE CVE-2006-4434
BID 19714

Recursos adicionales

OpenBSD Security Advisory Aug 25, 2006 (005)
http://www.openbsd.org/errata.html#sendmail3

OpenBSD Security Advisory Aug 25, 2006 (010)
http://www.openbsd.org/errata38.html#sendmail3

Debian Security Advisory (DSA 1164-1)
http://lists.debian.org/debian-security-announce/debian-security-announce-2006/msg00254.html

Mandriva Security Advisory (MDKSA-2006:156)
http://www.mandriva.com/security/advisories?name=MDKSA-2006:156

SUSE Security Advisory (SUSE-SR:2006:021)
http://www.novell.com/linux/security/advisories/2006_21_sr.html

Sun Alert Notification (102664)
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102664-1

Histórico de versiones

Versión Comentario Fecha
1.0 Aviso emitido 2006-08-28
1.1 CVE añadido. Aviso emitido por Debian (DSA 1164-1). Aviso emitido por Mandriva (MDKSA-2006:156) 2006-08-31
1.2 Aviso emitido por Suse (SUSE-SR:2006:021) 2006-09-04
1.3 Aviso emitido por Sun (102664) 2006-10-17
1.4 Aviso actualizado por Sun (102664) 2006-11-29
1.5 Aviso actualizado por Sun (102664) 2007-01-31

Miembros de

Ministerio de Defensa
CNI
CCN
CCN-CERT