[RHSA-2013:0504-02] Low: dhcp security and bug fix update

[news 28]

-----BEGIN PGP SIGNED MESSAGE-----

Hash: SHA1

 

=====================================================================

Red Hat Security Advisory

 

Synopsis: Low: dhcp security and bug fix update

Advisory ID: RHSA-2013:0504-02

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0504.html

Issue date: 2013-02-21

CVE Names: CVE-2012-3955

=====================================================================

 

1. Summary:

 

Updated dhcp packages that fix one security issue and two bugs are now

available for Red Hat Enterprise Linux 6.

 

The Red Hat Security Response Team has rated this update as having low

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:

 

Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64

Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

 

3. Description:

 

The dhcp packages provide the Dynamic Host Configuration Protocol (DHCP)

that allows individual devices on an IP network to get their own network

configuration information, including an IP address, a subnet mask, and a

broadcast address.

 

A flaw was found in the way the dhcpd daemon handled the expiration time of

IPv6 leases. If dhcpd's configuration was changed to reduce the default

IPv6 lease time, lease renewal requests for previously assigned leases

could cause dhcpd to crash. (CVE-2012-3955)

 

This update also fixes the following bugs:

 

* Prior to this update, the DHCP server discovered only the first IP

address of a network interface if the network interface had more than one

configured IP address. As a consequence, the DHCP server failed to

restart if the server was configured to serve only a subnet of the

following IP addresses. This update modifies network interface addresses

discovery code to find all addresses of a network interface. The DHCP

server can also serve subnets of other addresses. (BZ#803540)

 

* Prior to this update, the dhclient rewrote the /etc/resolv.conf file

with backup data after it was stopped even when the PEERDNS flag was set

to "no" before shut down if the configuration file was changed while the

dhclient ran with PEERDNS=yes. This update removes the backing up and

restoring functions for this configuration file from the dhclient-script.

Now, the dhclient no longer rewrites the /etc/resolv.conf file when

stopped. (BZ#824622)

 

All users of DHCP are advised to upgrade to these updated packages, which

fix these issues. After installing this update, all DHCP servers 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/knowledge/articles/11258

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

803540 - DHCP server fails to start if the subnet is not the primary subnet for a device

824622 - dhclient-script should honor PEERDNS on quit

856766 - CVE-2012-3955 dhcp: reduced expiration time of an IPv6 lease may cause dhcpd to crash

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

i386:

dhclient-4.1.1-34.P1.el6.i686.rpm

dhcp-common-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

 

x86_64:

dhclient-4.1.1-34.P1.el6.x86_64.rpm

dhcp-common-4.1.1-34.P1.el6.x86_64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

i386:

dhcp-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

 

x86_64:

dhcp-4.1.1-34.P1.el6.x86_64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

x86_64:

dhclient-4.1.1-34.P1.el6.x86_64.rpm

dhcp-common-4.1.1-34.P1.el6.x86_64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

x86_64:

dhcp-4.1.1-34.P1.el6.x86_64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

i386:

dhclient-4.1.1-34.P1.el6.i686.rpm

dhcp-4.1.1-34.P1.el6.i686.rpm

dhcp-common-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

 

ppc64:

dhclient-4.1.1-34.P1.el6.ppc64.rpm

dhcp-4.1.1-34.P1.el6.ppc64.rpm

dhcp-common-4.1.1-34.P1.el6.ppc64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.ppc64.rpm

 

s390x:

dhclient-4.1.1-34.P1.el6.s390x.rpm

dhcp-4.1.1-34.P1.el6.s390x.rpm

dhcp-common-4.1.1-34.P1.el6.s390x.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.s390x.rpm

 

x86_64:

dhclient-4.1.1-34.P1.el6.x86_64.rpm

dhcp-4.1.1-34.P1.el6.x86_64.rpm

dhcp-common-4.1.1-34.P1.el6.x86_64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

i386:

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

 

ppc64:

dhcp-debuginfo-4.1.1-34.P1.el6.ppc.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.ppc64.rpm

dhcp-devel-4.1.1-34.P1.el6.ppc.rpm

dhcp-devel-4.1.1-34.P1.el6.ppc64.rpm

 

s390x:

dhcp-debuginfo-4.1.1-34.P1.el6.s390.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.s390x.rpm

dhcp-devel-4.1.1-34.P1.el6.s390.rpm

dhcp-devel-4.1.1-34.P1.el6.s390x.rpm

 

x86_64:

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

i386:

dhclient-4.1.1-34.P1.el6.i686.rpm

dhcp-4.1.1-34.P1.el6.i686.rpm

dhcp-common-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

 

x86_64:

dhclient-4.1.1-34.P1.el6.x86_64.rpm

dhcp-4.1.1-34.P1.el6.x86_64.rpm

dhcp-common-4.1.1-34.P1.el6.x86_64.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/dhcp-4.1.1-34.P1.el6.src.rpm

 

i386:

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

 

x86_64:

dhcp-debuginfo-4.1.1-34.P1.el6.i686.rpm

dhcp-debuginfo-4.1.1-34.P1.el6.x86_64.rpm

dhcp-devel-4.1.1-34.P1.el6.i686.rpm

dhcp-devel-4.1.1-34.P1.el6.x86_64.rpm

 

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

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2012-3955.html

https://access.redhat.com/security/updates/classification/#low

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2013 Red Hat, Inc.

-----BEGIN PGP SIGNATURE-----

Version: GnuPG v1.4.4 (GNU/Linux)

 

iD8DBQFRJb+eXlSAg2UNWIIRAhG8AJwOy8FdPNqEBszeImlxyXqcDbeSFwCfejGR

eoxa7u+oUCxlUHM/rRLVnbU=

=FqlR

-----END PGP SIGNATURE-----

 

 

--