[RedHat] Schwachstelle in Samba vor Version 3.4.2

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Liebe Kolleginnen und Kollegen,

soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.

CVE-2009-2906 – Denial of Service Schwachstelle in SMBD

SMBD enthaelt eine Schwachstelle, durch die in dem Programm eine
Endlosschleife ausgeloest werden kann. Wird von einem SMB-Server eine
sog. ‘oplock break’ Nachricht empfangen, die nicht direkt zugeordnet
werden kann, fuehrt dies dazu, dass immer wieder von neuem versucht
wird, diese Nachricht zu verarbeiten, was jedoch nicht gelingt. Ein
Angreifer kann diese Schwachstelle ausnutzen um einen Angriff auf
einen anfaelligen Server zu starten und dessen Erreichbarkeit fuer
andere Benutzer des Dienstes einzuschraenken.

Betroffen sind die folgenden Software Pakete und Plattformen:

Paket samba

Red Hat Desktop version 3 – i386, x86_64
Red Hat Enterprise Linux AS version 3 – i386, ia64, ppc, s390, s390x,
x86_64
Red Hat Enterprise Linux ES version 3 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 – i386, ia64, x86_64

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
https://rhn.redhat.com/errata/RHSA-2009-1528.html

(c) der deutschen Zusammenfassung bei DFN-CERT Services GmbH; die
Verbreitung, auch auszugsweise, ist nur unter Hinweis auf den Urheber,
DFN-CERT Services GmbH, und nur zu nicht kommerziellen Zwecken
gestattet.

Mit freundlichen Gruessen,
Torsten Voss

– —

Dipl.-Ing.(FH) Torsten Voss (Incident Response Team)

DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-555
Sitz / Register: Hamburg, AG Hamburg, HRB 88805, Ust-IdNr.: DE 232129737
Sachsenstrasse 5, 20097 Hamburg/Germany, CEO: Dr. Klaus-Peter Kossakowski

Automatische Warnmeldungen https://www.cert.dfn.de/autowarn

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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: samba security and bug fix update
Advisory ID: RHSA-2009:1528-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-1528.html
Issue date: 2009-10-27
CVE Names: CVE-2009-2906
=====================================================================

1. Summary:

Updated samba packages that fix a security issue and a bug are now
available for Red Hat Enterprise Linux 3.

This update has been rated as having moderate security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Desktop version 3 – i386, x86_64
Red Hat Enterprise Linux AS version 3 – i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux ES version 3 – i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 – i386, ia64, x86_64

3. Description:

Samba is a suite of programs used by machines to share files, printers, and
other information.

A denial of service flaw was found in the Samba smbd daemon. An
authenticated, remote user could send a specially-crafted response that
would cause an smbd child process to enter an infinite loop. An
authenticated, remote user could use this flaw to exhaust system resources
by opening multiple CIFS sessions. (CVE-2009-2906)

This update also fixes the following bug:

* the RHSA-2007:0354 update added code to escape input passed to scripts
that are run by Samba. This code was missing “c” from the list of valid
characters, causing it to be escaped. With this update, the previous patch
has been updated to include “c” in the list of valid characters.
(BZ#242754)

Users of Samba should upgrade to these updated packages, which contain a
backported patch to correct this issue. After installing this update,
the smb service will be restarted automatically.

4. Solution:

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.

This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

242754 – Missing character bug in latest security patches
526645 – CVE-2009-2906 samba: infinite loop flaw in smbd on unexpected oplock break notification reply

6. Package List:

Red Hat Enterprise Linux AS version 3:

Source:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/samba-3.0.9-1.3E.16.src.rpm

i386:
samba-3.0.9-1.3E.16.i386.rpm
samba-client-3.0.9-1.3E.16.i386.rpm
samba-common-3.0.9-1.3E.16.i386.rpm
samba-debuginfo-3.0.9-1.3E.16.i386.rpm
samba-swat-3.0.9-1.3E.16.i386.rpm

ia64:
samba-3.0.9-1.3E.16.i386.rpm
samba-3.0.9-1.3E.16.ia64.rpm
samba-client-3.0.9-1.3E.16.ia64.rpm
samba-common-3.0.9-1.3E.16.i386.rpm
samba-common-3.0.9-1.3E.16.ia64.rpm
samba-debuginfo-3.0.9-1.3E.16.i386.rpm
samba-debuginfo-3.0.9-1.3E.16.ia64.rpm
samba-swat-3.0.9-1.3E.16.ia64.rpm

ppc:
samba-3.0.9-1.3E.16.ppc.rpm
samba-3.0.9-1.3E.16.ppc64.rpm
samba-client-3.0.9-1.3E.16.ppc.rpm
samba-common-3.0.9-1.3E.16.ppc.rpm
samba-common-3.0.9-1.3E.16.ppc64.rpm
samba-debuginfo-3.0.9-1.3E.16.ppc.rpm
samba-debuginfo-3.0.9-1.3E.16.ppc64.rpm
samba-swat-3.0.9-1.3E.16.ppc.rpm

s390:
samba-3.0.9-1.3E.16.s390.rpm
samba-client-3.0.9-1.3E.16.s390.rpm
samba-common-3.0.9-1.3E.16.s390.rpm
samba-debuginfo-3.0.9-1.3E.16.s390.rpm
samba-swat-3.0.9-1.3E.16.s390.rpm

s390x:
samba-3.0.9-1.3E.16.s390.rpm
samba-3.0.9-1.3E.16.s390x.rpm
samba-client-3.0.9-1.3E.16.s390x.rpm
samba-common-3.0.9-1.3E.16.s390.rpm
samba-common-3.0.9-1.3E.16.s390x.rpm
samba-debuginfo-3.0.9-1.3E.16.s390.rpm
samba-debuginfo-3.0.9-1.3E.16.s390x.rpm
samba-swat-3.0.9-1.3E.16.s390x.rpm

x86_64:
samba-3.0.9-1.3E.16.i386.rpm
samba-3.0.9-1.3E.16.x86_64.rpm
samba-client-3.0.9-1.3E.16.x86_64.rpm
samba-common-3.0.9-1.3E.16.i386.rpm
samba-common-3.0.9-1.3E.16.x86_64.rpm
samba-debuginfo-3.0.9-1.3E.16.i386.rpm
samba-debuginfo-3.0.9-1.3E.16.x86_64.rpm
samba-swat-3.0.9-1.3E.16.x86_64.rpm

Red Hat Desktop version 3:

Source:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/samba-3.0.9-1.3E.16.src.rpm

i386:
samba-3.0.9-1.3E.16.i386.rpm
samba-client-3.0.9-1.3E.16.i386.rpm
samba-common-3.0.9-1.3E.16.i386.rpm
samba-debuginfo-3.0.9-1.3E.16.i386.rpm
samba-swat-3.0.9-1.3E.16.i386.rpm

Red Hat Enterprise Linux ES version 3:

Source:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/samba-3.0.9-1.3E.16.src.rpm

i386:
samba-3.0.9-1.3E.16.i386.rpm
samba-client-3.0.9-1.3E.16.i386.rpm
samba-common-3.0.9-1.3E.16.i386.rpm
samba-debuginfo-3.0.9-1.3E.16.i386.rpm
samba-swat-3.0.9-1.3E.16.i386.rpm

Red Hat Enterprise Linux WS version 3:

Source:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/samba-3.0.9-1.3E.16.src.rpm

i386:
samba-3.0.9-1.3E.16.i386.rpm
samba-client-3.0.9-1.3E.16.i386.rpm
samba-common-3.0.9-1.3E.16.i386.rpm
samba-debuginfo-3.0.9-1.3E.16.i386.rpm
samba-swat-3.0.9-1.3E.16.i386.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2906
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is . More contact
details at https://www.redhat.com/security/team/contact/

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[RedHat] Schwachstelle in Samba vor Version 3.4.2 - RHSA-2009:1528-01

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[RedHat] Schwachstelle in Samba vor Version 3.4.2 – RHSA-2009:1528-01

[RedHat] Schwachstelle in Samba vor Version 3.4.2 - RHSA-2009:1528-01