Issued:

2011-04-12

Updated:

2011-04-12

RHSA-2011:0436 - Moderate: avahi security update

Synopsis

Moderate: avahi security update

Type/Severity

Security Advisory Moderate

Topic

Updated avahi packages that fix one security issue are now available for Red Hat Enterprise Linux 5.

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.

Description

Avahi is an implementation of the DNS Service Discovery and Multicast DNS specifications for Zero Configuration 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, view printers to print to, and find shared files on other computers.

A flaw was found in the way the Avahi daemon (avahi-daemon) processed Multicast DNS (mDNS) packets with an empty payload. An attacker on the local network could use this flaw to cause avahi-daemon on a target system to enter an infinite loop via an empty mDNS UDP packet. (CVE-2011-1002)

All users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, avahi-daemon will be restarted automatically.

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 This content is not included.https://access.redhat.com/kb/docs/DOC-11259

Affected Products

Updated Packages

• avahi-glib-0.6.16-10.el5_6.i386.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.s390x.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.i386.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.ia64.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.x86_64.rpm
• avahi-qt3-0.6.16-10.el5_6.s390.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.s390x.rpm
• avahi-0.6.16-10.el5_6.i386.rpm
• avahi-glib-devel-0.6.16-10.el5_6.ppc64.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.s390x.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.ppc64.rpm
• avahi-compat-howl-0.6.16-10.el5_6.s390.rpm
• avahi-glib-devel-0.6.16-10.el5_6.i386.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.s390.rpm
• avahi-0.6.16-10.el5_6.src.rpm
• avahi-glib-0.6.16-10.el5_6.s390x.rpm
• avahi-devel-0.6.16-10.el5_6.ppc64.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.ia64.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.s390x.rpm
• avahi-qt3-0.6.16-10.el5_6.i386.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.ppc64.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.ia64.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.i386.rpm
• avahi-glib-devel-0.6.16-10.el5_6.s390.rpm
• avahi-compat-howl-0.6.16-10.el5_6.ia64.rpm
• avahi-devel-0.6.16-10.el5_6.ia64.rpm
• avahi-tools-0.6.16-10.el5_6.s390x.rpm
• avahi-devel-0.6.16-10.el5_6.i386.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.x86_64.rpm
• avahi-glib-0.6.16-10.el5_6.ppc64.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.i386.rpm
• avahi-devel-0.6.16-10.el5_6.s390x.rpm
• avahi-glib-0.6.16-10.el5_6.s390.rpm
• avahi-0.6.16-10.el5_6.x86_64.rpm
• avahi-0.6.16-10.el5_6.s390.rpm
• avahi-compat-howl-0.6.16-10.el5_6.ppc.rpm
• avahi-qt3-0.6.16-10.el5_6.ppc64.rpm
• avahi-devel-0.6.16-10.el5_6.s390.rpm
• avahi-compat-howl-0.6.16-10.el5_6.i386.rpm
• avahi-glib-devel-0.6.16-10.el5_6.ia64.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.ppc64.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.s390.rpm
• avahi-glib-0.6.16-10.el5_6.ia64.rpm
• avahi-0.6.16-10.el5_6.ppc.rpm
• avahi-glib-devel-0.6.16-10.el5_6.ppc.rpm
• avahi-tools-0.6.16-10.el5_6.ppc.rpm
• avahi-compat-howl-0.6.16-10.el5_6.s390x.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.ppc.rpm
• avahi-0.6.16-10.el5_6.ia64.rpm
• avahi-qt3-0.6.16-10.el5_6.ia64.rpm
• avahi-tools-0.6.16-10.el5_6.i386.rpm
• avahi-compat-howl-0.6.16-10.el5_6.x86_64.rpm
• avahi-glib-devel-0.6.16-10.el5_6.x86_64.rpm
• avahi-compat-howl-0.6.16-10.el5_6.ppc64.rpm
• avahi-qt3-0.6.16-10.el5_6.x86_64.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.x86_64.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.x86_64.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.s390.rpm
• avahi-glib-0.6.16-10.el5_6.x86_64.rpm
• avahi-devel-0.6.16-10.el5_6.ppc.rpm
• avahi-0.6.16-10.el5_6.s390x.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.ia64.rpm
• avahi-0.6.16-10.el5_6.ppc64.rpm
• avahi-glib-0.6.16-10.el5_6.ppc.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.ppc.rpm
• avahi-qt3-devel-0.6.16-10.el5_6.s390.rpm
• avahi-compat-libdns_sd-0.6.16-10.el5_6.ppc.rpm
• avahi-tools-0.6.16-10.el5_6.ia64.rpm
• avahi-tools-0.6.16-10.el5_6.x86_64.rpm
• avahi-qt3-0.6.16-10.el5_6.ppc.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.i386.rpm
• avahi-compat-howl-devel-0.6.16-10.el5_6.ppc64.rpm
• avahi-devel-0.6.16-10.el5_6.x86_64.rpm
• avahi-glib-devel-0.6.16-10.el5_6.s390x.rpm
• avahi-qt3-0.6.16-10.el5_6.s390x.rpm
• avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.ppc.rpm

Fixes

• This content is not included.BZ - 667187

CVEs

• CVE-2011-1002

References

• https://access.redhat.com/security/updates/classification/#moderate

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.