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Liebe Kolleginnen und Kollegen,
soeben erreichte uns nachfolgendes RedHat Security Advisory. Wir geben
diese Informationen unveraendert an Sie weiter.
CVE-2010-2949 – Null-Pointer Dereferenzierung im Quagga bgpd Daemon.
Der Quagga bgpd Daemon parst Pfadinformationen fuer Autonome Systeme
fehlerhaft, was zu einer Null-Pointer Dereferenzierung fuehren kann. Ein
Angreifer, der BGP-Pakete mit speziell praeparierten AS-Path Requests an
eine betroffene Quagga Installation schickt, kann auf diese Weise einen
Denial of Service Angriff durchfuehren.
CVE-2010-2948 – Schwachstelle in Quagga
Quagga enthaelt eine Schwachstelle bei der Verarbeitung von
Route-Refresh Nachrichten durch den bgpd Daemon. Wird von einem BGP-Peer
eine Route-Refresh Nachricht mit einem speziell praeparierten Outbound
Route Filtering Eintrag an eine betroffene Quagga-Installation
verschickt, so kann dies zu einem Absturz, oder im schlimmsten Fall, zum
Ausfuehren beliebiger Befehle mit den Rechten des Programmes fuehren.
Betroffen sind die folgenden Software Pakete und Plattformen:
Paket quagga
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 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,
Detlev O. Matthies
– —
Detlev O. Matthies, M.Sc. (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: quagga security update
Advisory ID: RHSA-2010:0945-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0945.html
Issue date: 2010-12-06
CVE Names: CVE-2010-2948 CVE-2010-2949
=====================================================================
1. Summary:
Updated quagga packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
2. Relevant releases/architectures:
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 Workstation (v. 6) – i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) – i386, x86_64
3. Description:
Quagga is a TCP/IP based routing software suite. The Quagga bgpd daemon
implements the BGP (Border Gateway Protocol) routing protocol.
A stack-based buffer overflow flaw was found in the way the Quagga bgpd
daemon processed certain BGP Route Refresh (RR) messages. A configured BGP
peer could send a specially-crafted BGP message, causing bgpd on a target
system to crash or, possibly, execute arbitrary code with the privileges of
the user running bgpd. (CVE-2010-2948)
Note: On Red Hat Enterprise Linux 6 it is not possible to exploit
CVE-2010-2948 to run arbitrary code as the overflow is blocked by
FORTIFY_SOURCE.
A NULL pointer dereference flaw was found in the way the Quagga bgpd daemon
parsed the paths of autonomous systems (AS). A configured BGP peer could
crash bgpd on a target system via a specially-crafted BGP message.
(CVE-2010-2949)
Users of quagga should upgrade to these updated packages, which contain
backported patches to correct these issues. After installing the updated
packages, the bgpd daemon must be restarted for the 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/):
626783 – CVE-2010-2948 Quagga (bgpd): Stack buffer overflow by processing certain Route-Refresh messages
626795 – CVE-2010-2949 Quagga (bgpd): DoS (crash) while processing certain BGP update AS path messages
6. Package List:
Red Hat Enterprise Linux Server (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/quagga-0.99.15-5.el6_0.1.src.rpm
i386:
quagga-0.99.15-5.el6_0.1.i686.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.i686.rpm
ppc64:
quagga-0.99.15-5.el6_0.1.ppc64.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.ppc64.rpm
s390x:
quagga-0.99.15-5.el6_0.1.s390x.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.s390x.rpm
x86_64:
quagga-0.99.15-5.el6_0.1.x86_64.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/quagga-0.99.15-5.el6_0.1.src.rpm
i386:
quagga-contrib-0.99.15-5.el6_0.1.i686.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.i686.rpm
quagga-devel-0.99.15-5.el6_0.1.i686.rpm
ppc64:
quagga-contrib-0.99.15-5.el6_0.1.ppc64.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.ppc.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.ppc64.rpm
quagga-devel-0.99.15-5.el6_0.1.ppc.rpm
quagga-devel-0.99.15-5.el6_0.1.ppc64.rpm
s390x:
quagga-contrib-0.99.15-5.el6_0.1.s390x.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.s390.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.s390x.rpm
quagga-devel-0.99.15-5.el6_0.1.s390.rpm
quagga-devel-0.99.15-5.el6_0.1.s390x.rpm
x86_64:
quagga-contrib-0.99.15-5.el6_0.1.x86_64.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.i686.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.x86_64.rpm
quagga-devel-0.99.15-5.el6_0.1.i686.rpm
quagga-devel-0.99.15-5.el6_0.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/quagga-0.99.15-5.el6_0.1.src.rpm
i386:
quagga-0.99.15-5.el6_0.1.i686.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.i686.rpm
x86_64:
quagga-0.99.15-5.el6_0.1.x86_64.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/quagga-0.99.15-5.el6_0.1.src.rpm
i386:
quagga-contrib-0.99.15-5.el6_0.1.i686.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.i686.rpm
quagga-devel-0.99.15-5.el6_0.1.i686.rpm
x86_64:
quagga-contrib-0.99.15-5.el6_0.1.x86_64.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.i686.rpm
quagga-debuginfo-0.99.15-5.el6_0.1.x86_64.rpm
quagga-devel-0.99.15-5.el6_0.1.i686.rpm
quagga-devel-0.99.15-5.el6_0.1.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-2010-2948.html
https://www.redhat.com/security/data/cve/CVE-2010-2949.html
http://www.redhat.com/security/updates/classification/#moderate
8. Contact:
The Red Hat security contact is
details at https://www.redhat.com/security/team/contact/
Copyright 2010 Red Hat, Inc.
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