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Category:   Application (Generic)  >   Avahi Vendors:   avahi.org
(Red Hat Issues Fix) Avahi Bug in Processing mDNS Packets Lets Remote Users Deny Service
SecurityTracker Alert ID:  1021554
SecurityTracker URL:  http://securitytracker.com/id/1021554
CVE Reference:   CVE-2008-5081   (Links to External Site)
Date:  Jan 12 2009
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 0.6.24
Description:   A vulnerability was reported in Avahi. A remote user can cause denial of service conditions.

A remote user can send a specially crafted mDNS packet to cause the target service to crash.

Hugo Dias reported this vulnerability.

Impact:   A remote user can cause the target service to crash.
Solution:   Red Hat has released a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2009-0013.html

Vendor URL:  avahi.org/ (Links to External Site)
Cause:   Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Dec 22 2008 Avahi Bug in Processing mDNS Packets Lets Remote Users Deny Service



 Source Message Contents

Subject:  [RHSA-2009:0013-01] Moderate: avahi security update


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

Synopsis:          Moderate: avahi security update
Advisory ID:       RHSA-2009:0013-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-0013.html
Issue date:        2009-01-12
CVE Names:         CVE-2008-5081 
=====================================================================

1. Summary:

Updated avahi packages that fix a security issue are now available for Red
Hat Enterprise Linux 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 Desktop (v. 5 client) - i386, 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:

Avahi is an implementation of the DNS Service Discovery and Multicast DNS
specifications for Zeroconf Networking. It facilitates service discovery on
a local network. Avahi and Avahi-aware applications allow you to plug your
computer into a network and, with no configuration, view other people to
chat with, see printers to print to, and find shared files on other computers.

Hugo Dias discovered a denial of service flaw in avahi-daemon. A remote
attacker on the same local area network (LAN) could send a
specially-crafted mDNS (Multicast DNS) packet that would cause avahi-daemon
to exit unexpectedly due to a failed assertion check. (CVE-2008-5081)

All users are advised to upgrade to these updated packages, which contain a
backported patch which resolves this issue. After installing the update,
avahi-daemon 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/):

475964 - CVE-2008-5081 avahi: avahi-daemon DoS (application abort) via packet with source port 0

6. Package List:

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/avahi-0.6.16-1.el5_2.1.src.rpm

i386:
avahi-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.i386.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-0.6.16-1.el5_2.1.i386.rpm
avahi-tools-0.6.16-1.el5_2.1.i386.rpm

x86_64:
avahi-0.6.16-1.el5_2.1.i386.rpm
avahi-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.x86_64.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.i386.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.x86_64.rpm
avahi-glib-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-0.6.16-1.el5_2.1.x86_64.rpm
avahi-qt3-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-0.6.16-1.el5_2.1.x86_64.rpm
avahi-tools-0.6.16-1.el5_2.1.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/avahi-0.6.16-1.el5_2.1.src.rpm

i386:
avahi-compat-howl-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.i386.rpm
avahi-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.i386.rpm

x86_64:
avahi-compat-howl-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.i386.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.x86_64.rpm
avahi-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/avahi-0.6.16-1.el5_2.1.src.rpm

i386:
avahi-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.i386.rpm
avahi-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-tools-0.6.16-1.el5_2.1.i386.rpm

ia64:
avahi-0.6.16-1.el5_2.1.ia64.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.ia64.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.ia64.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.ia64.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.ia64.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.ia64.rpm
avahi-devel-0.6.16-1.el5_2.1.ia64.rpm
avahi-glib-0.6.16-1.el5_2.1.ia64.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.ia64.rpm
avahi-qt3-0.6.16-1.el5_2.1.ia64.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.ia64.rpm
avahi-tools-0.6.16-1.el5_2.1.ia64.rpm

ppc:
avahi-0.6.16-1.el5_2.1.ppc.rpm
avahi-0.6.16-1.el5_2.1.ppc64.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.ppc.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.ppc64.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.ppc.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.ppc64.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.ppc.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.ppc64.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.ppc.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.ppc64.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.ppc.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.ppc64.rpm
avahi-devel-0.6.16-1.el5_2.1.ppc.rpm
avahi-devel-0.6.16-1.el5_2.1.ppc64.rpm
avahi-glib-0.6.16-1.el5_2.1.ppc.rpm
avahi-glib-0.6.16-1.el5_2.1.ppc64.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.ppc.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.ppc64.rpm
avahi-qt3-0.6.16-1.el5_2.1.ppc.rpm
avahi-qt3-0.6.16-1.el5_2.1.ppc64.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.ppc.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.ppc64.rpm
avahi-tools-0.6.16-1.el5_2.1.ppc.rpm

s390x:
avahi-0.6.16-1.el5_2.1.s390.rpm
avahi-0.6.16-1.el5_2.1.s390x.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.s390.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.s390x.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.s390.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.s390x.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.s390.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.s390x.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.s390.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.s390x.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.s390.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.s390x.rpm
avahi-devel-0.6.16-1.el5_2.1.s390.rpm
avahi-devel-0.6.16-1.el5_2.1.s390x.rpm
avahi-glib-0.6.16-1.el5_2.1.s390.rpm
avahi-glib-0.6.16-1.el5_2.1.s390x.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.s390.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.s390x.rpm
avahi-qt3-0.6.16-1.el5_2.1.s390.rpm
avahi-qt3-0.6.16-1.el5_2.1.s390x.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.s390.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.s390x.rpm
avahi-tools-0.6.16-1.el5_2.1.s390x.rpm

x86_64:
avahi-0.6.16-1.el5_2.1.i386.rpm
avahi-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-howl-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-0.6.16-1.el5_2.1.x86_64.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-compat-libdns_sd-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.i386.rpm
avahi-debuginfo-0.6.16-1.el5_2.1.x86_64.rpm
avahi-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-glib-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-0.6.16-1.el5_2.1.x86_64.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-glib-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-qt3-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-0.6.16-1.el5_2.1.x86_64.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.i386.rpm
avahi-qt3-devel-0.6.16-1.el5_2.1.x86_64.rpm
avahi-tools-0.6.16-1.el5_2.1.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-2008-5081
http://www.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2009 Red Hat, Inc.
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