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Red Hat Enterprise Linux 5: RHSA-2011:0436-01 Moderate: Avahi mDNS Threat

red hat
Calendar Grey April 12, 2011
Dist Redhat Esm H88
Essential security patch available for avahi on CentOS addressing mDNS handling vulnerability. Update immediately!
Updated avahi packages that fix one security issue are now available for Red Hat Enterprise Linux 5

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 https://access.redhat.com/kb/docs/DOC-11259

Summary

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.

Topics%20covered

Topics Covered

security advisory update red hat moderate severity network service avahi mDNS flaw

References

https://access.redhat.com/security/cve/CVE-2011-1002 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: avahi-0.6.16-10.el5_6.i386.rpm avahi-compat-howl-0.6.16-10.el5_6.i386.rpm avahi-compat-libdns_sd-0.6.16-10.el5_6.i386.rpm avahi-debuginfo-0.6.16-10.el5_6.i386.rpm avahi-glib-0.6.16-10.el5_6.i386.rpm avahi-qt3-0.6.16-10.el5_6.i386.rpm avahi-tools-0.6.16-10.el5_6.i386.rpm
x86_64: avahi-0.6.16-10.el5_6.i386.rpm avahi-0.6.16-10.el5_6.x86_64.rpm avahi-compat-howl-0.6.16-10.el5_6.i386.rpm avahi-compat-howl-0.6.16-10.el5_6.x86_64.rpm avahi-compat-libdns_sd-0.6.16-10.el5_6.i386.rpm avahi-compat-libdns_sd-0.6.16-10.el5_6.x86_64.rpm avahi-debuginfo-0.6.16-10.el5_6.i386.rpm avahi-debuginfo-0.6.16-10.el5_6.x86_64.rpm avahi-glib-0.6.16-10.el5_6.i386.rpm avahi-glib-0.6.16-10.el5_6.x86_64.rpm avahi-qt3-0.6.16-10.el5_6.i386.rpm avahi-qt3-0.6.16-10.el5_6.x86_64.rpm avahi-tools-0.6.16-10.el5_6.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source:
i386: avahi-compat-howl-devel-0.6.16-10.el5_6.i386.rpm avahi-compat-libdns_sd-devel-0.6.16-10.el5_6.i386.rpm avahi-debuginfo-0.6.16-10.el5_6.i386.rpm avahi-devel-0.6.16-10.el5_6.i386.rpm avahi-glib-devel-0.6.16-10.el5_6.i386.rpm avahi-qt3-devel-0.6.16-10.el5_6.i386.rpm
x86_64: avahi-compat-howl-devel-0.6.16-10.el5_6.i386.rpm avahi-compat-howl-devel-0.6.16-10.el5_6.x86_64.rpm

Read the Full Advisory


Advisory ID: RHSA-2011:0436-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0436.html
Issue date: 2011-04-12

Topic

Updated avahi packages that fix one security issue are now available forRed Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory update red hat moderate severity network service avahi mDNS flaw

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

667187 - CVE-2011-1002 avahi: daemon infinite loop triggered by an empty UDP packet (CVE-2010-2244 fix regression)

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