[RedHat] Mehrere Schwachstellen im Pidgin Instant Messenger vor Version 2.6.6

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Liebe Kolleginnen und Kollegen,

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

CVE-2010-0423 – Denial of Service Schwachstelle in Pidgin

Der Instant Messenger Pidgin enthaelt eine Schwachstelle bei der
Anzeige von Nachrichten und Multi-User Chats. Werden von einem
Chat-Teilnehmer grosse Mengen von Smileys, wie beispielsweise ‘:-)’,
‘:-(‘ oder ‘:-D’ in eine Nachricht eingebaut, so kann es beim Parsen
dieser Emoticons zu einer sehr hohen Prozessorauslastung kommen. Ein
entfernter Angreifer kann diese Schwachstelle ausnutzen, um einen
Denial of Service Angriff auf das Programm zu starten.

CVE-2010-0277 – Schwachstelle im MSN-Plugin fuer Pidgin

Aufgrund einer Schwachstelle in der Unterstuezung fuer das MSN-Messenger
Protokoll im Pidgin Instant-Messenger kann ein entfernter Angreifer
einen Absturz der Anwendung ausloesen. Grund hierfuer ist ein Fehler
aller enthaltenen Parametern in SLP-Paketen.

CVE-2010-0420 – Fehlerhafte Ueberpruefung von Benutzerdaten ermoeglicht
Denial of Service Angriffe

Pidgin ueberprueft Benutzernamen nicht darauf, ob sich nicht zulaessige
Zeichen darin befinden. Betritt ein Benutzer, dessen Benutzername ein
‘Linebreak’-Zeichen enthaelt, einen Multi-User-Chat, so wird der
Benutzer unter zwei Namen im Chat angemeldet. Dies hat zur Folge, dass
der IM-Client ‘Finch’, eine Konsolen-Anwendung, durch den nicht
zulaessigen Namen zum Absturz gebracht werden (Denial of Service).

Betroffen sind die folgenden Software Pakete und Plattformen:

Paket pidgin

RHEL Desktop Workstation (v. 5 client) – i386, x86_64
RHEL Optional Productivity Applications (v. 5 server) – i386, x86_64
Red Hat Enterprise Linux AS version 4 – i386, ia64, ppc, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) – 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 WS version 4 – i386, ia64, x86_64

Vom Hersteller werden ueberarbeitete Pakete zur Verfuegung gestellt.

Hersteller Advisory:
https://rhn.redhat.com/errata/RHSA-2010-0115.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,
Michael Groening, DFN-CERT
– —

Michael Groening (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: pidgin security update
Advisory ID: RHSA-2010:0115-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0115.html
Issue date: 2010-02-18
CVE Names: CVE-2010-0277 CVE-2010-0420 CVE-2010-0423
=====================================================================

1. Summary:

Updated pidgin packages that fix three security issues are now available
for Red Hat Enterprise Linux 4 and 5.

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

2. Relevant releases/architectures:

3. Description:

Pidgin is an instant messaging program which can log in to multiple
accounts on multiple instant messaging networks simultaneously.

An input sanitization flaw was found in the way Pidgin’s MSN protocol
implementation handled MSNSLP invitations. A remote attacker could send a
specially-crafted INVITE request that would cause a denial of service
(memory corruption and Pidgin crash). (CVE-2010-0277)

A denial of service flaw was found in Finch’s XMPP chat implementation,
when using multi-user chat. If a Finch user in a multi-user chat session
were to change their nickname to contain the HTML “br” element, it would
cause Finch to crash. (CVE-2010-0420)

Red Hat would like to thank Sadrul Habib Chowdhury of the Pidgin project
for responsibly reporting the CVE-2010-0420 issue.

A denial of service flaw was found in the way Pidgin processed emoticon
images. A remote attacker could flood the victim with emoticon images
during mutual communication, leading to excessive CPU use. (CVE-2010-0423)

These packages upgrade Pidgin to version 2.6.6. Refer to the Pidgin release
notes for a full list of changes: http://developer.pidgin.im/wiki/ChangeLog

All Pidgin users are advised to upgrade to these updated packages, which
correct these issues. Pidgin must be restarted for this update to take
effect.

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
http://kbase.redhat.com/faq/docs/DOC-11259

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

554335 – CVE-2010-0277 pidgin MSN protocol plugin memory corruption
565786 – CVE-2010-0420 pidgin: Finch XMPP MUC Crash
565792 – CVE-2010-0423 pidgin: Smiley Denial of Service

6. Package List:

Red Hat Enterprise Linux AS version 4:

Source:
ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/pidgin-2.6.6-1.el4.src.rpm

i386:
finch-2.6.6-1.el4.i386.rpm
finch-devel-2.6.6-1.el4.i386.rpm
libpurple-2.6.6-1.el4.i386.rpm
libpurple-devel-2.6.6-1.el4.i386.rpm
libpurple-perl-2.6.6-1.el4.i386.rpm
libpurple-tcl-2.6.6-1.el4.i386.rpm
pidgin-2.6.6-1.el4.i386.rpm
pidgin-debuginfo-2.6.6-1.el4.i386.rpm
pidgin-devel-2.6.6-1.el4.i386.rpm
pidgin-perl-2.6.6-1.el4.i386.rpm

ia64:
finch-2.6.6-1.el4.ia64.rpm
finch-devel-2.6.6-1.el4.ia64.rpm
libpurple-2.6.6-1.el4.ia64.rpm
libpurple-devel-2.6.6-1.el4.ia64.rpm
libpurple-perl-2.6.6-1.el4.ia64.rpm
libpurple-tcl-2.6.6-1.el4.ia64.rpm
pidgin-2.6.6-1.el4.ia64.rpm
pidgin-debuginfo-2.6.6-1.el4.ia64.rpm
pidgin-devel-2.6.6-1.el4.ia64.rpm
pidgin-perl-2.6.6-1.el4.ia64.rpm

ppc:
finch-2.6.6-1.el4.ppc.rpm
finch-devel-2.6.6-1.el4.ppc.rpm
libpurple-2.6.6-1.el4.ppc.rpm
libpurple-devel-2.6.6-1.el4.ppc.rpm
libpurple-perl-2.6.6-1.el4.ppc.rpm
libpurple-tcl-2.6.6-1.el4.ppc.rpm
pidgin-2.6.6-1.el4.ppc.rpm
pidgin-debuginfo-2.6.6-1.el4.ppc.rpm
pidgin-devel-2.6.6-1.el4.ppc.rpm
pidgin-perl-2.6.6-1.el4.ppc.rpm

x86_64:
finch-2.6.6-1.el4.x86_64.rpm
finch-devel-2.6.6-1.el4.x86_64.rpm
libpurple-2.6.6-1.el4.x86_64.rpm
libpurple-devel-2.6.6-1.el4.x86_64.rpm
libpurple-perl-2.6.6-1.el4.x86_64.rpm
libpurple-tcl-2.6.6-1.el4.x86_64.rpm
pidgin-2.6.6-1.el4.x86_64.rpm
pidgin-debuginfo-2.6.6-1.el4.x86_64.rpm
pidgin-devel-2.6.6-1.el4.x86_64.rpm
pidgin-perl-2.6.6-1.el4.x86_64.rpm

Red Hat Enterprise Linux Desktop version 4:

Source:
ftp://updates.redhat.com/enterprise/4Desktop/en/os/SRPMS/pidgin-2.6.6-1.el4.src.rpm

Red Hat Enterprise Linux ES version 4:

Source:
ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/pidgin-2.6.6-1.el4.src.rpm

Red Hat Enterprise Linux WS version 4:

Source:
ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/pidgin-2.6.6-1.el4.src.rpm

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/pidgin-2.6.6-1.el5.src.rpm

i386:
finch-2.6.6-1.el5.i386.rpm
libpurple-2.6.6-1.el5.i386.rpm
libpurple-perl-2.6.6-1.el5.i386.rpm
libpurple-tcl-2.6.6-1.el5.i386.rpm
pidgin-2.6.6-1.el5.i386.rpm
pidgin-debuginfo-2.6.6-1.el5.i386.rpm
pidgin-perl-2.6.6-1.el5.i386.rpm

x86_64:
finch-2.6.6-1.el5.i386.rpm
finch-2.6.6-1.el5.x86_64.rpm
libpurple-2.6.6-1.el5.i386.rpm
libpurple-2.6.6-1.el5.x86_64.rpm
libpurple-perl-2.6.6-1.el5.x86_64.rpm
libpurple-tcl-2.6.6-1.el5.x86_64.rpm
pidgin-2.6.6-1.el5.i386.rpm
pidgin-2.6.6-1.el5.x86_64.rpm
pidgin-debuginfo-2.6.6-1.el5.i386.rpm
pidgin-debuginfo-2.6.6-1.el5.x86_64.rpm
pidgin-perl-2.6.6-1.el5.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/pidgin-2.6.6-1.el5.src.rpm

i386:
finch-devel-2.6.6-1.el5.i386.rpm
libpurple-devel-2.6.6-1.el5.i386.rpm
pidgin-debuginfo-2.6.6-1.el5.i386.rpm
pidgin-devel-2.6.6-1.el5.i386.rpm

x86_64:
finch-devel-2.6.6-1.el5.i386.rpm
finch-devel-2.6.6-1.el5.x86_64.rpm
libpurple-devel-2.6.6-1.el5.i386.rpm
libpurple-devel-2.6.6-1.el5.x86_64.rpm
pidgin-debuginfo-2.6.6-1.el5.i386.rpm
pidgin-debuginfo-2.6.6-1.el5.x86_64.rpm
pidgin-devel-2.6.6-1.el5.i386.rpm
pidgin-devel-2.6.6-1.el5.x86_64.rpm

RHEL Optional Productivity Applications (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/pidgin-2.6.6-1.el5.src.rpm

i386:
finch-2.6.6-1.el5.i386.rpm
finch-devel-2.6.6-1.el5.i386.rpm
libpurple-2.6.6-1.el5.i386.rpm
libpurple-devel-2.6.6-1.el5.i386.rpm
libpurple-perl-2.6.6-1.el5.i386.rpm
libpurple-tcl-2.6.6-1.el5.i386.rpm
pidgin-2.6.6-1.el5.i386.rpm
pidgin-debuginfo-2.6.6-1.el5.i386.rpm
pidgin-devel-2.6.6-1.el5.i386.rpm
pidgin-perl-2.6.6-1.el5.i386.rpm

x86_64:
finch-2.6.6-1.el5.i386.rpm
finch-2.6.6-1.el5.x86_64.rpm
finch-devel-2.6.6-1.el5.i386.rpm
finch-devel-2.6.6-1.el5.x86_64.rpm
libpurple-2.6.6-1.el5.i386.rpm
libpurple-2.6.6-1.el5.x86_64.rpm
libpurple-devel-2.6.6-1.el5.i386.rpm
libpurple-devel-2.6.6-1.el5.x86_64.rpm
libpurple-perl-2.6.6-1.el5.x86_64.rpm
libpurple-tcl-2.6.6-1.el5.x86_64.rpm
pidgin-2.6.6-1.el5.i386.rpm
pidgin-2.6.6-1.el5.x86_64.rpm
pidgin-debuginfo-2.6.6-1.el5.i386.rpm
pidgin-debuginfo-2.6.6-1.el5.x86_64.rpm
pidgin-devel-2.6.6-1.el5.i386.rpm
pidgin-devel-2.6.6-1.el5.x86_64.rpm
pidgin-perl-2.6.6-1.el5.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:

https://www.redhat.com/security/data/cve/CVE-2010-0277.html
https://www.redhat.com/security/data/cve/CVE-2010-0420.html
https://www.redhat.com/security/data/cve/CVE-2010-0423.html
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] Mehrere Schwachstellen im Pidgin Instant Messenger vor Version 2.6.6 - RHSA-2010:0115-01

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[RedHat] Mehrere Schwachstellen im Pidgin Instant Messenger vor Version 2.6.6 – RHSA-2010:0115-01

[RedHat] Mehrere Schwachstellen im Pidgin Instant Messenger vor Version 2.6.6 - RHSA-2010:0115-01