Rapid7 Vulnerability & Exploit Database

RHSA-2011:0436: avahi security update

Back to Search

RHSA-2011:0436: avahi security update

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Published
02/22/2011
Created
07/25/2018
Added
04/19/2011
Modified
07/04/2017

Description

Avahi is an implementation of the DNS Service Discovery and Multicast DNSspecifications for Zero Configuration Networking. It facilitates servicediscovery on a local network. Avahi and Avahi-aware applications allow youto plug your computer into a network and, with no configuration, view otherpeople to chat with, view printers to print to, and find shared files onother computers.A flaw was found in the way the Avahi daemon (avahi-daemon) processedMulticast DNS (mDNS) packets with an empty payload. An attacker on thelocal network could use this flaw to cause avahi-daemon on a target systemto enter an infinite loop via an empty mDNS UDP packet. (CVE-2011-1002)All users are advised to upgrade to these updated packages, which containa backported patch to correct this issue. After installing the update,avahi-daemon will be restarted automatically.

Solution(s)

  • redhat-upgrade-avahi
  • redhat-upgrade-avahi-compat-howl
  • redhat-upgrade-avahi-compat-howl-devel
  • redhat-upgrade-avahi-compat-libdns_sd
  • redhat-upgrade-avahi-compat-libdns_sd-devel
  • redhat-upgrade-avahi-devel
  • redhat-upgrade-avahi-glib
  • redhat-upgrade-avahi-glib-devel
  • redhat-upgrade-avahi-qt3
  • redhat-upgrade-avahi-qt3-devel
  • redhat-upgrade-avahi-tools

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;