RHEL 6 : avahi (RHSA-2011:0779)

high Nessus Plugin ID 54600

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Synopsis

The remote Red Hat host is missing a security update for avahi.

Description

The remote Redhat Enterprise Linux 6 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2011:0779 advisory.

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)

This update also fixes the following bug:

* Previously, the avahi packages in Red Hat Enterprise Linux 6 were not compiled with standard RPM CFLAGS; therefore, the Stack Protector and Fortify Source protections were not enabled, and the debuginfo packages did not contain the information required for debugging. This update corrects this issue by using proper CFLAGS when compiling the packages. (BZ#629954, BZ#684276)

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

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the RHEL avahi package based on the guidance in RHSA-2011:0779.

Plugin Details

Severity: High

ID: 54600

File Name: redhat-RHSA-2011-0779.nasl

Version: 1.19

Type: local

Agent: unix

Family: Red Hat Local Security Checks

Published: 5/20/2011

Updated: 4/14/2025

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Azure, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.1

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS Score Source: CVE-2011-1002

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:redhat:enterprise_linux:avahi-libs, p-cpe:/a:redhat:enterprise_linux:avahi-compat-howl, p-cpe:/a:redhat:enterprise_linux:avahi-qt4-devel, p-cpe:/a:redhat:enterprise_linux:avahi-qt3, cpe:/o:redhat:enterprise_linux:6, p-cpe:/a:redhat:enterprise_linux:avahi-autoipd, p-cpe:/a:redhat:enterprise_linux:avahi-ui, p-cpe:/a:redhat:enterprise_linux:avahi-qt3-devel, p-cpe:/a:redhat:enterprise_linux:avahi-gobject, p-cpe:/a:redhat:enterprise_linux:avahi-qt4, p-cpe:/a:redhat:enterprise_linux:avahi-compat-howl-devel, p-cpe:/a:redhat:enterprise_linux:avahi-glib-devel, p-cpe:/a:redhat:enterprise_linux:avahi-gobject-devel, p-cpe:/a:redhat:enterprise_linux:avahi-ui-devel, p-cpe:/a:redhat:enterprise_linux:avahi-tools, p-cpe:/a:redhat:enterprise_linux:avahi, p-cpe:/a:redhat:enterprise_linux:avahi-devel, p-cpe:/a:redhat:enterprise_linux:avahi-compat-libdns_sd-devel, p-cpe:/a:redhat:enterprise_linux:avahi-glib, p-cpe:/a:redhat:enterprise_linux:avahi-dnsconfd, p-cpe:/a:redhat:enterprise_linux:avahi-compat-libdns_sd, p-cpe:/a:redhat:enterprise_linux:avahi-ui-tools

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/19/2011

Vulnerability Publication Date: 2/22/2011

Exploitable With

Core Impact

Reference Information

CVE: CVE-2011-1002

BID: 46446

CWE: 835

RHSA: 2011:0779

Detections

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