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[RedHat] Schwachstellen in Fetchmail vor Version 6.3.11 - RHSA-2009:1427-01
- To: win-sec-ssc-l_AT_lists.lrz-muenchen.de
- Subject: [RedHat] Schwachstellen in Fetchmail vor Version 6.3.11 - RHSA-2009:1427-01
- From: WiN Site Security Contacts <win-sec-ssc_AT_lists.dfn-cert.de>
- Date: Wed, 9 Sep 2009 16:15:41 +0200 (CEST)
- Reply-to: win-sec_AT_cert.dfn.de
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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
CVE-2007-4565 - Denial of Service Schwachstelle in Fetchmail
Die Fetchmail Komponente zum Versenden von Warnnachrichten beinhaltet
eine Schwachstelle. Wird eine per E-Mail versandte Warnung von dem
SMTP-Server, an den Fetchmail die Nachricht weiterleitet, nicht
angenommen, kommt es zu einer NULL-Pointer Dereferenzierung.
Konsequenz ist ein Absturz von Fetchmail. Ein Angreifer, der die
Kontrolle ueber den SMTP Server besitzt, kann diese Schwachstelle
ausnutzen um einen Absturz von Fetchmail auszuloesen.
CVE-2008-2711 - Denial of Service Schwachstelle in fetchmail beim
Anzeigen von Mail-Headern
Aufgrund eines Programmierfehlers greift fetchmail beim Anzeigen von
Mail-Headern mit mehr als 2048 Bytes Laenge im Verbose Mode ("-v -v")
auf nicht initialisierte Speicherbereiche zu. Angreifer koennen diese
Schwachstelle ueber das Netz dazu ausnutzen, den fetchmail Prozess zum
Absturz zu bringen (Denial of Service), indem sie eine entsprechend
aufgebaute Mail an eine Adresse senden, fuer die fetchmail Mail
abholt.
CVE-2009-2666 - Fehler bei der Auswertung von Zertifikaten mit NULL
Bytes in Fetchmail
Fetchmail akzeptiert ASCII NULL Zeichen im Domainnamen des CN-Felds
eines Zertifikats. Die Schwachstelle ist analog zu CVE-2009-2408, so
dass auch hier Angreifer Man-in-the-Middle Angriffe durchfuehren und an
vertrauliche Daten des Benutzers gelangen koennen.
Betroffen sind die folgenden Software Pakete und Plattformen:
Paket fetchmail
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x,
x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x,
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 WS version 4 - i386, ia64, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.
Hersteller Advisory:
https://rhn.redhat.com/errata/RHSA-2009-1427.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,
Detlev O. Matthies
- --
Detlev O. Matthies, M.Sc. (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: fetchmail security update
Advisory ID: RHSA-2009:1427-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-1427.html
Issue date: 2009-09-08
CVE Names: CVE-2007-4565 CVE-2008-2711 CVE-2009-2666
=====================================================================
1. Summary:
An updated fetchmail package that fixes multiple security issues is now
available for Red Hat Enterprise Linux 3, 4, and 5.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, 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 WS version 4 - i386, ia64, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
3. Description:
Fetchmail is a remote mail retrieval and forwarding utility intended for
use over on-demand TCP/IP links, such as SLIP and PPP connections.
It was discovered that fetchmail is affected by the previously published
"null prefix attack", caused by incorrect handling of NULL characters in
X.509 certificates. If an attacker is able to get a carefully-crafted
certificate signed by a trusted Certificate Authority, the attacker could
use the certificate during a man-in-the-middle attack and potentially
confuse fetchmail into accepting it by mistake. (CVE-2009-2666)
A flaw was found in the way fetchmail handles rejections from a remote SMTP
server when sending warning mail to the postmaster. If fetchmail sent a
warning mail to the postmaster of an SMTP server and that SMTP server
rejected it, fetchmail could crash. (CVE-2007-4565)
A flaw was found in fetchmail. When fetchmail is run in double verbose
mode ("-v -v"), it could crash upon receiving certain, malformed mail
messages with long headers. A remote attacker could use this flaw to cause
a denial of service if fetchmail was also running in daemon mode ("-d").
(CVE-2008-2711)
Note: when using SSL-enabled services, it is recommended that the fetchmail
"--sslcertck" option be used to enforce strict SSL certificate checking.
All fetchmail users should upgrade to this updated package, which contains
backported patches to correct these issues. If fetchmail is running in
daemon mode, it must be restarted for this update to take effect (use the
"fetchmail --quit" command to stop the fetchmail process).
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/):
260601 - CVE-2007-4565 Fetchmail NULL pointer dereference
451758 - CVE-2008-2711 fetchmail: Crash in large log messages in verbose mode
515804 - CVE-2009-2666 fetchmail: SSL null terminator bypass
6. Package List:
Red Hat Enterprise Linux AS version 3:
Source:
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/fetchmail-6.2.0-3.el3.5.src.rpm
i386:
fetchmail-6.2.0-3.el3.5.i386.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.i386.rpm
ia64:
fetchmail-6.2.0-3.el3.5.ia64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.ia64.rpm
ppc:
fetchmail-6.2.0-3.el3.5.ppc.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.ppc.rpm
s390:
fetchmail-6.2.0-3.el3.5.s390.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.s390.rpm
s390x:
fetchmail-6.2.0-3.el3.5.s390x.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.s390x.rpm
x86_64:
fetchmail-6.2.0-3.el3.5.x86_64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.x86_64.rpm
Red Hat Desktop version 3:
Source:
ftp://updates.redhat.com/enterprise/3desktop/en/os/SRPMS/fetchmail-6.2.0-3.el3.5.src.rpm
i386:
fetchmail-6.2.0-3.el3.5.i386.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.i386.rpm
x86_64:
fetchmail-6.2.0-3.el3.5.x86_64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.x86_64.rpm
Red Hat Enterprise Linux ES version 3:
Source:
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/fetchmail-6.2.0-3.el3.5.src.rpm
i386:
fetchmail-6.2.0-3.el3.5.i386.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.i386.rpm
ia64:
fetchmail-6.2.0-3.el3.5.ia64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.ia64.rpm
x86_64:
fetchmail-6.2.0-3.el3.5.x86_64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.x86_64.rpm
Red Hat Enterprise Linux WS version 3:
Source:
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/fetchmail-6.2.0-3.el3.5.src.rpm
i386:
fetchmail-6.2.0-3.el3.5.i386.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.i386.rpm
ia64:
fetchmail-6.2.0-3.el3.5.ia64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.ia64.rpm
x86_64:
fetchmail-6.2.0-3.el3.5.x86_64.rpm
fetchmail-debuginfo-6.2.0-3.el3.5.x86_64.rpm
Red Hat Enterprise Linux AS version 4:
Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/fetchmail-6.2.5-6.0.1.el4_8.1.src.rpm
i386:
fetchmail-6.2.5-6.0.1.el4_8.1.i386.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.i386.rpm
ia64:
fetchmail-6.2.5-6.0.1.el4_8.1.ia64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.ia64.rpm
ppc:
fetchmail-6.2.5-6.0.1.el4_8.1.ppc.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.ppc.rpm
s390:
fetchmail-6.2.5-6.0.1.el4_8.1.s390.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.s390.rpm
s390x:
fetchmail-6.2.5-6.0.1.el4_8.1.s390x.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.s390x.rpm
x86_64:
fetchmail-6.2.5-6.0.1.el4_8.1.x86_64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/fetchmail-6.2.5-6.0.1.el4_8.1.src.rpm
i386:
fetchmail-6.2.5-6.0.1.el4_8.1.i386.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.i386.rpm
x86_64:
fetchmail-6.2.5-6.0.1.el4_8.1.x86_64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/fetchmail-6.2.5-6.0.1.el4_8.1.src.rpm
i386:
fetchmail-6.2.5-6.0.1.el4_8.1.i386.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.i386.rpm
ia64:
fetchmail-6.2.5-6.0.1.el4_8.1.ia64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.ia64.rpm
x86_64:
fetchmail-6.2.5-6.0.1.el4_8.1.x86_64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/fetchmail-6.2.5-6.0.1.el4_8.1.src.rpm
i386:
fetchmail-6.2.5-6.0.1.el4_8.1.i386.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.i386.rpm
ia64:
fetchmail-6.2.5-6.0.1.el4_8.1.ia64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.ia64.rpm
x86_64:
fetchmail-6.2.5-6.0.1.el4_8.1.x86_64.rpm
fetchmail-debuginfo-6.2.5-6.0.1.el4_8.1.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/fetchmail-6.3.6-1.1.el5_3.1.src.rpm
i386:
fetchmail-6.3.6-1.1.el5_3.1.i386.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.i386.rpm
x86_64:
fetchmail-6.3.6-1.1.el5_3.1.x86_64.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/fetchmail-6.3.6-1.1.el5_3.1.src.rpm
i386:
fetchmail-6.3.6-1.1.el5_3.1.i386.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.i386.rpm
ia64:
fetchmail-6.3.6-1.1.el5_3.1.ia64.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.ia64.rpm
ppc:
fetchmail-6.3.6-1.1.el5_3.1.ppc.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.ppc.rpm
s390x:
fetchmail-6.3.6-1.1.el5_3.1.s390x.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.s390x.rpm
x86_64:
fetchmail-6.3.6-1.1.el5_3.1.x86_64.rpm
fetchmail-debuginfo-6.3.6-1.1.el5_3.1.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://www.redhat.com/security/team/key/#package
7. References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4565
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2711
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2666
http://www.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is <secalert_AT_redhat.com>. More contact
details at https://www.redhat.com/security/team/contact/
Copyright 2009 Red Hat, Inc.
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