RHBA-2011:0034 - Bug Fix Advisory

Topic

Updated dhcpv6 packages that resolve several issues are now available for Red
Hat Enterprise Linux 5.

Description

The dhcpv6 packages implement the Dynamic Host Configuration Protocol (DHCP) for
Internet Protocol version 6 (IPv6) networks, in accordance with RFC 3315:
Dynamic Host Configuration Protocol for IPv6 (DHCPv6). DHCP is a protocol that
allows individual devices on an IP network to get their own network
configuration information. It consists of: dhcp6c(8), the DHCPv6 client daemon;
dhcp6s(8), the DHCPv6 server daemon; and dhcp6r(8), the DHCPv6 relay agent.

These updated packages provide fixes for the following bugs:

• previously, if the server sent a NotOnLink error in it's Reply message during

the Solicit/Advertise/Request/Reply process, the client restarted the process by
sending a Solicit message, but then ignored the Advertise message sent by the
server. With this update, the client doesn't ignore the subsequent Advertise
message and correctly sends Request message to server. (BZ #511323)

• previously, if the server received a Relay-Forward message in which the Relay

Message Option comes before the Interface-Id Option the server didn't correctly
parse the message and failed with an error. With this update, the server parses
the Relay-Forward message correctly. (BZ #512399)

• previously, when more than one 'range' statement was defined in the server's

configuration file (dhcp6s.conf), the server always sent NotOnLink status in the
Reply message. That forced clients to restart the DHCP server discovery process.
With this update, the setting of the status code in the Reply message is fixed.
(BZ #598439)

All users of dhcpv6 are advised to upgrade to these updated packages, which
resolve these issues.

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

Affected Products

• Red Hat Enterprise Linux Server 5 x86_64
• Red Hat Enterprise Linux Server 5 ia64
• Red Hat Enterprise Linux Server 5 i386
• Red Hat Enterprise Linux Workstation 5 x86_64
• Red Hat Enterprise Linux Workstation 5 i386
• Red Hat Enterprise Linux Desktop 5 x86_64
• Red Hat Enterprise Linux Desktop 5 i386
• Red Hat Enterprise Linux for IBM z Systems 5 s390x
• Red Hat Enterprise Linux for Power, big endian 5 ppc
• Red Hat Enterprise Linux Server from RHUI 5 x86_64
• Red Hat Enterprise Linux Server from RHUI 5 i386

Fixes

• BZ - 511323 - Problems handling NotOnLink error in REPLY
• BZ - 512399 - DHCPv6 does not handle RELAY-FORW messages correcly
• BZ - 598439 - Server sends NotOnLink status in Reply when more range statements configured

CVEs

(none)

References

(none)