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centosCentOS ProjectCESA-2010:0528
HistoryJul 14, 2010 - 10:38 p.m.

avahi security update

2010-07-1422:38:14
CentOS Project
lists.centos.org
45

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.033 Low

EPSS

Percentile

91.0%

CentOS Errata and Security Advisory CESA-2010:0528

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 corrupted checksums. An attacker on the
local network could use this flaw to cause avahi-daemon on a target system
to exit unexpectedly via specially-crafted mDNS packets. (CVE-2010-2244)

A flaw was found in the way avahi-daemon processed incoming unicast mDNS
messages. If the mDNS reflector were enabled on a system, an attacker on
the local network could send a specially-crafted unicast mDNS message to
that system, resulting in its avahi-daemon flooding the network with a
multicast packet storm, and consuming a large amount of CPU. Note: The mDNS
reflector is disabled by default. (CVE-2009-0758)

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

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2010-July/078939.html
https://lists.centos.org/pipermail/centos-announce/2010-July/078940.html

Affected packages:
avahi
avahi-compat-howl
avahi-compat-howl-devel
avahi-compat-libdns_sd
avahi-compat-libdns_sd-devel
avahi-devel
avahi-glib
avahi-glib-devel
avahi-qt3
avahi-qt3-devel
avahi-tools

Upstream details at:
https://access.redhat.com/errata/RHSA-2010:0528

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:N/I:N/A:C

0.033 Low

EPSS

Percentile

91.0%

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