int(1019)

Vulnerability Bulletins


Denegación de Servicio en el servidor nmbd de Samba

Vulnerability classification

Property Value
Confidence level Oficial
Impact Denegación de Servicio
Dificulty Avanzado
Required attacker level Acceso remoto sin cuenta a un servicio estandar

System information

Property Value
Affected manufacturer GNU/Linux
Affected software Samba 3.0.x <=v3.0.6

Description

Se ha descubierto un error de validación de entrada en el servidor nmbd de las versiones 3.0.x menores o igual a la 3.0.6 de Samba. La vulnerabilidad reside en el manejo de las peticiones SAM_UAS_CHANGE por parte de la función process_logon_packet().

La explotación de esta vulnerabilidad podría permitir a un atacante remoto provocar una situación de denegación de servicio del servidor nmbd mediante un paquete UDP malformado.

Es importante notar que esta vulnerabilidad solamente es explotable cuando el demonio nmbd ha sido configurado para aceptar conexiones de dominio.

Solution



Actualización de software

Samba
Samba 3.0.5 - Parche
http://download.samba.org/samba/ftp/patches/security/

Mandrake Linux

Mandrakelinux 10.0
x86
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/libsmbclient0-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/libsmbclient0-devel-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/libsmbclient0-static-devel-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/nss_wins-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-client-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-common-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-doc-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-passdb-mysql-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-passdb-pgsql-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-passdb-xml-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-server-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-swat-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/RPMS/samba-winbind-3.0.6-4.1.100mdk.i586.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/10.0/SRPMS/samba-3.0.6-4.1.100mdk.src.rpm
AMD64
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/lib64smbclient0-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/lib64smbclient0-devel-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/lib64smbclient0-static-devel-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/nss_wins-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-client-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-common-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-doc-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-passdb-mysql-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-passdb-pgsql-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-passdb-xml-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-server-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-swat-3.0.6-4.1.100mdk.amd64.rpm
ftp://ftp.ps.pl/mirrors/Mandrakelinux/official/updates/amd64/10.0/RPMS/samba-winbind-3.0.6-4.1.100mdk.amd64.rpm

Red Hat Linux

Red Hat Desktop (v. 3)
AMD64
samba-3.0.7-1.3E.x86_64.rpm
samba-client-3.0.7-1.3E.x86_64.rpm
samba-common-3.0.7-1.3E.x86_64.rpm
samba-swat-3.0.7-1.3E.x86_64.rpm
SRPMS
samba-3.0.7-1.3E.src.rpm
i386
samba-3.0.7-1.3E.i386.rpm
samba-client-3.0.7-1.3E.i386.rpm
samba-common-3.0.7-1.3E.i386.rpm
samba-swat-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
https://rhn.redhat.com/

Red Hat Enterprise Linux AS (v. 3)
AMD64
samba-3.0.7-1.3E.x86_64.rpm
samba-client-3.0.7-1.3E.x86_64.rpm
samba-common-3.0.7-1.3E.x86_64.rpm
samba-swat-3.0.7-1.3E.x86_64.rpm
SRPMS
samba-3.0.7-1.3E.src.rpm
i386
samba-3.0.7-1.3E.i386.rpm
samba-client-3.0.7-1.3E.i386.rpm
samba-common-3.0.7-1.3E.i386.rpm
samba-swat-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
ia64
samba-3.0.7-1.3E.ia64.rpm
samba-client-3.0.7-1.3E.ia64.rpm
samba-common-3.0.7-1.3E.ia64.rpm
samba-swat-3.0.7-1.3E.ia64.rpm
ppc
samba-3.0.7-1.3E.ppc.rpm
samba-client-3.0.7-1.3E.ppc.rpm
samba-common-3.0.7-1.3E.ppc.rpm
samba-swat-3.0.7-1.3E.ppc.rpm
s390
samba-3.0.7-1.3E.s390.rpm
samba-client-3.0.7-1.3E.s390.rpm
samba-common-3.0.7-1.3E.s390.rpm
samba-swat-3.0.7-1.3E.s390.rpm
samba-3.0.7-1.3E.s390.rpm
s390x
samba-3.0.7-1.3E.s390x.rpm
samba-client-3.0.7-1.3E.s390x.rpm
samba-common-3.0.7-1.3E.s390x.rpm
samba-swat-3.0.7-1.3E.s390x.rpm
https://rhn.redhat.com/

Red Hat Enterprise Linux ES (v. 3)
AMD64
samba-3.0.7-1.3E.x86_64.rpm
samba-client-3.0.7-1.3E.x86_64.rpm
samba-common-3.0.7-1.3E.x86_64.rpm
samba-swat-3.0.7-1.3E.x86_64.rpm
SRPMS
samba-3.0.7-1.3E.src.rpm
i386
samba-3.0.7-1.3E.i386.rpm
samba-client-3.0.7-1.3E.i386.rpm
samba-common-3.0.7-1.3E.i386.rpm
samba-swat-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
ia64
samba-3.0.7-1.3E.ia64.rpm
samba-client-3.0.7-1.3E.ia64.rpm
samba-common-3.0.7-1.3E.ia64.rpm
samba-swat-3.0.7-1.3E.ia64.rpm
https://rhn.redhat.com/

Red Hat Enterprise Linux WS (v. 3)
AMD64
samba-3.0.7-1.3E.x86_64.rpm
samba-client-3.0.7-1.3E.x86_64.rpm
samba-common-3.0.7-1.3E.x86_64.rpm
samba-swat-3.0.7-1.3E.x86_64.rpm
SRPMS
samba-3.0.7-1.3E.src.rpm
i386
samba-3.0.7-1.3E.i386.rpm
samba-client-3.0.7-1.3E.i386.rpm
samba-common-3.0.7-1.3E.i386.rpm
samba-swat-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
samba-3.0.7-1.3E.i386.rpm
ia64
samba-3.0.7-1.3E.ia64.rpm
samba-client-3.0.7-1.3E.ia64.rpm
samba-common-3.0.7-1.3E.ia64.rpm
samba-swat-3.0.7-1.3E.ia64.rpm
https://rhn.redhat.com/

Standar resources

Property Value
CVE CAN-2004-0808
BID

Other resources

Samba announce: Samba 3.0.x Denial of Service Flaw
http://us1.samba.org/samba/history/3.0_DOS_sept04_announce.txt

iDEFENSE Security Advisory 09.13.04a
www.idefense.com/application/poi/display?id=138&type=vulnerabilities

Mandrakesoft Security Advisory MDKSA-2004:092
http://www.mandrakesoft.com/security/advisories?name=MDKSA-2004:092

Red Hat Security Advisory RHSA-2004:467-04
https://rhn.redhat.com/errata/RHSA-2004-467.html

Version history

Version Comments Date
1.0 Aviso emitido 2004-09-14
1.1 Aviso emitido por Red Hat (RHSA-2004:467-04) 2004-09-23
Ministerio de Defensa
CNI
CCN
CCN-CERT