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Red Hat Security Advisory
Synopsis: Moderate: avahi security update
Advisory ID: RHSA-2009:0013-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2009-0013.html
Issue date: 2009-01-12
CVE Names: CVE-2008-5081
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1. Summary:
Updated avahi packages that fix a security issue are now available for Red
Hat Enterprise Linux 5.
This update has been rated as having moderate security impact by the Red
Hat Security Response Team.
2. Relevant releases/architectures:
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
3. Description:
Avahi is an implementation of the DNS Service Discovery and Multicast DNS
specifications for Zeroconf 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, see printers to print to, and find shared files on other computers.
Hugo Dias discovered a denial of service flaw in avahi-daemon. A remote
attacker on the same local area network (LAN) could send a
specially-crafted mDNS (Multicast DNS) packet that would cause avahi-daemon
to exit unexpectedly due to a failed assertion check. (CVE-2008-5081)
All users are advised to upgrade to these updated packages, which contain a
backported patch which resolves this issue. After installing the update,
avahi-daemon will be restarted automatically.
4. Solution:
Before applying this update, make sure that all previously-released
errata relevant to your system have been applied.
This update is available via Red Hat Network. Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
475964 - CVE-2008-5081 avahi: avahi-daemon DoS (application abort) via packet with source port 0
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details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package
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07-13-2010, 05:54 PM
Moderate: avahi security update
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Red Hat Security Advisory
Synopsis: Moderate: avahi security update
Advisory ID: RHSA-2010:0528-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2010-0528.html
Issue date: 2010-07-13
CVE Names: CVE-2009-0758 CVE-2010-2244
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1. Summary:
Updated avahi packages that fix two security issues are now available for
Red Hat Enterprise Linux 5.
The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.
2. 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
3. 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 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.
4. 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
http://kbase.redhat.com/faq/docs/DOC-11259
5. Bugs fixed (http://bugzilla.redhat.com/):
488314 - CVE-2009-0758 avahi: remote DoS via legacy unicast mDNS queries
607293 - CVE-2010-2244 avahi: assertion failure after receiving a packet with corrupted checksum
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package
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04-12-2011, 06:24 PM
Moderate: avahi security update
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Red Hat Security Advisory
Synopsis: Moderate: avahi security update
Advisory ID: RHSA-2011:0436-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-0436.html
Issue date: 2011-04-12
CVE Names: CVE-2011-1002
================================================== ===================
1. Summary:
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.
2. 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
3. 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.
4. 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
5. Bugs fixed (http://bugzilla.redhat.com/):
667187 - CVE-2011-1002 avahi: daemon infinite loop triggered by an empty UDP packet (CVE-2010-2244 fix regression)
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package
Moderate: avahi security update
