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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
CVE-2011-1720 – Schwachstelle in Postfix
In Postfix vor Version 2.5.13, 2.6.10, 2.7.4 und 2.8.3 besteht ein
Fehler bei der Behandlung von SASL-Authentifizierungsanfragen. Postfix
erzeugt einen SASL-Handle fuer jede SMTP-Sitzung, welcher bis zum
Beenden der Verbindung verwendet wird. Bei einer fehlgeschlagenen
Authentifizierung wird fehlerhafter Weise kein neues Handle erzeugt.
Falls zwei unterschiedliche Authentifizierungsmechanismen (bspw.
CRAM-MD5 u. OTP) angefragt werden, kann ein Heap-Overflow auftreten. Ein
entfernter Angreifer kann dies ausnutzen, um den Postfix-Prozess zu
beenden und ggf. Code auszufuehren.
Betroffen sind die folgenden Software Pakete und Plattformen:
Paket postfix
Red Hat Enterprise Linux (v. 5 server) – i386, ia64, ppc, s390x,
x86_64
Red Hat Enterprise Linux AS version 4 – i386, ia64, ppc, s390, s390x,
x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux Desktop (v. 6) – i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) – i386, x86_64
Red Hat Enterprise Linux Desktop version 4 – i386, x86_64
Red Hat Enterprise Linux ES version 4 – i386, ia64, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) – x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) – x86_64
Red Hat Enterprise Linux Server (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) – i386, ppc64, s390x,
x86_64
Red Hat Enterprise Linux WS version 4 – i386, ia64, x86_64
Red Hat Enterprise Linux Workstation (v. 6) – i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) – i386, x86_64
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
(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,
Matthias Braeck
– —
Matthias Braeck (Incident Response Team)
DFN-CERT Services GmbH, https://www.dfn-cert.de, Phone +49 40 808077-590
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: postfix security update
Advisory ID: RHSA-2011:0843-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-0843.html
Issue date: 2011-05-31
CVE Names: CVE-2011-1720
=====================================================================
1. Summary:
Updated postfix packages that fix one security issue are now available for
Red Hat Enterprise Linux 4, 5, and 6.
The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.
2. Relevant releases/architectures:
Red Hat Enterprise Linux (v. 5 server) – i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux AS version 4 – i386, ia64, ppc, s390, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – i386, x86_64
Red Hat Enterprise Linux Desktop (v. 6) – i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) – i386, x86_64
Red Hat Enterprise Linux Desktop version 4 – i386, x86_64
Red Hat Enterprise Linux ES version 4 – i386, ia64, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) – x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) – x86_64
Red Hat Enterprise Linux Server (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) – i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux WS version 4 – i386, ia64, x86_64
Red Hat Enterprise Linux Workstation (v. 6) – i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) – i386, x86_64
3. Description:
Postfix is a Mail Transport Agent (MTA), supporting LDAP, SMTP AUTH (SASL),
and TLS.
A heap-based buffer over-read flaw was found in the way Postfix performed
SASL handlers management for SMTP sessions, when Cyrus SASL authentication
was enabled. A remote attacker could use this flaw to cause the Postfix
smtpd server to crash via a specially-crafted SASL authentication request.
The smtpd process was automatically restarted by the postfix master process
after the time configured with service_throttle_time elapsed.
(CVE-2011-1720)
Note: Cyrus SASL authentication for Postfix is not enabled by default.
Red Hat would like to thank the CERT/CC for reporting this issue. Upstream
acknowledges Thomas Jarosch of Intra2net AG as the original reporter.
Users of Postfix are advised to upgrade to these updated packages, which
contain a backported patch to resolve this issue. After installing this
update, the postfix service will be restarted automatically.
4. Solution:
Before applying this update, make sure all previously-released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
699035 – CVE-2011-1720 postfix (smtpd): Crash due to improper management of SASL handlers for SMTP sessions
6. Package List:
Red Hat Enterprise Linux AS version 4:
Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/postfix-2.2.10-1.5.el4.src.rpm
i386:
postfix-2.2.10-1.5.el4.i386.rpm
postfix-debuginfo-2.2.10-1.5.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
ia64:
postfix-2.2.10-1.5.el4.ia64.rpm
postfix-debuginfo-2.2.10-1.5.el4.ia64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.ia64.rpm
ppc:
postfix-2.2.10-1.5.el4.ppc.rpm
postfix-debuginfo-2.2.10-1.5.el4.ppc.rpm
postfix-pflogsumm-2.2.10-1.5.el4.ppc.rpm
s390:
postfix-2.2.10-1.5.el4.s390.rpm
postfix-debuginfo-2.2.10-1.5.el4.s390.rpm
postfix-pflogsumm-2.2.10-1.5.el4.s390.rpm
s390x:
postfix-2.2.10-1.5.el4.s390x.rpm
postfix-debuginfo-2.2.10-1.5.el4.s390x.rpm
postfix-pflogsumm-2.2.10-1.5.el4.s390x.rpm
x86_64:
postfix-2.2.10-1.5.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/postfix-2.2.10-1.5.el4.src.rpm
i386:
postfix-2.2.10-1.5.el4.i386.rpm
postfix-debuginfo-2.2.10-1.5.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
x86_64:
postfix-2.2.10-1.5.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/postfix-2.2.10-1.5.el4.src.rpm
i386:
postfix-2.2.10-1.5.el4.i386.rpm
postfix-debuginfo-2.2.10-1.5.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
ia64:
postfix-2.2.10-1.5.el4.ia64.rpm
postfix-debuginfo-2.2.10-1.5.el4.ia64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.ia64.rpm
x86_64:
postfix-2.2.10-1.5.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/postfix-2.2.10-1.5.el4.src.rpm
i386:
postfix-2.2.10-1.5.el4.i386.rpm
postfix-debuginfo-2.2.10-1.5.el4.i386.rpm
postfix-pflogsumm-2.2.10-1.5.el4.i386.rpm
ia64:
postfix-2.2.10-1.5.el4.ia64.rpm
postfix-debuginfo-2.2.10-1.5.el4.ia64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.ia64.rpm
x86_64:
postfix-2.2.10-1.5.el4.x86_64.rpm
postfix-debuginfo-2.2.10-1.5.el4.x86_64.rpm
postfix-pflogsumm-2.2.10-1.5.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/postfix-2.3.3-2.3.el5_6.src.rpm
i386:
postfix-2.3.3-2.3.el5_6.i386.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.i386.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.i386.rpm
x86_64:
postfix-2.3.3-2.3.el5_6.x86_64.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.x86_64.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/postfix-2.3.3-2.3.el5_6.src.rpm
i386:
postfix-2.3.3-2.3.el5_6.i386.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.i386.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.i386.rpm
ia64:
postfix-2.3.3-2.3.el5_6.ia64.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.ia64.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.ia64.rpm
ppc:
postfix-2.3.3-2.3.el5_6.ppc.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.ppc.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.ppc.rpm
s390x:
postfix-2.3.3-2.3.el5_6.s390x.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.s390x.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.s390x.rpm
x86_64:
postfix-2.3.3-2.3.el5_6.x86_64.rpm
postfix-debuginfo-2.3.3-2.3.el5_6.x86_64.rpm
postfix-pflogsumm-2.3.3-2.3.el5_6.x86_64.rpm
Red Hat Enterprise Linux Desktop (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
i386:
postfix-2.6.6-2.2.el6_1.i686.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.i686.rpm
x86_64:
postfix-2.6.6-2.2.el6_1.x86_64.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
i386:
postfix-debuginfo-2.6.6-2.2.el6_1.i686.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.i686.rpm
x86_64:
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
x86_64:
postfix-2.6.6-2.2.el6_1.x86_64.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
x86_64:
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
i386:
postfix-2.6.6-2.2.el6_1.i686.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.i686.rpm
ppc64:
postfix-2.6.6-2.2.el6_1.ppc64.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.ppc64.rpm
s390x:
postfix-2.6.6-2.2.el6_1.s390x.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.s390x.rpm
x86_64:
postfix-2.6.6-2.2.el6_1.x86_64.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
i386:
postfix-debuginfo-2.6.6-2.2.el6_1.i686.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.i686.rpm
ppc64:
postfix-debuginfo-2.6.6-2.2.el6_1.ppc64.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.ppc64.rpm
s390x:
postfix-debuginfo-2.6.6-2.2.el6_1.s390x.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.s390x.rpm
x86_64:
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
i386:
postfix-2.6.6-2.2.el6_1.i686.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.i686.rpm
x86_64:
postfix-2.6.6-2.2.el6_1.x86_64.rpm
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation-6.1.z/en/os/SRPMS/postfix-2.6.6-2.2.el6_1.src.rpm
i386:
postfix-debuginfo-2.6.6-2.2.el6_1.i686.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.i686.rpm
x86_64:
postfix-debuginfo-2.6.6-2.2.el6_1.x86_64.rpm
postfix-perl-scripts-2.6.6-2.2.el6_1.x86_64.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://access.redhat.com/security/team/key/#package
7. References:
https://www.redhat.com/security/data/cve/CVE-2011-1720.html
https://access.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2011 Red Hat, Inc.
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