RedHat: Critical: dhcp security update
Summary
The Dynamic Host Configuration Protocol (DHCP) is a protocol 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.
The Mandriva Linux Engineering Team discovered a stack-based buffer
overflow flaw in the ISC DHCP client. If the DHCP client were to receive a
malicious DHCP response, it could crash or execute arbitrary code with the
permissions of the client (root). (CVE-2009-0692)
An insecure temporary file use flaw was discovered in the DHCP daemon's
init script ("/etc/init.d/dhcpd"). A local attacker could use this flaw to
overwrite an arbitrary file with the output of the "dhcpd -t" command via
a symbolic link attack, if a system administrator executed the DHCP init
script with the "configtest", "restart", or "reload" option.
(CVE-2009-1893)
Users of DHCP should upgrade to these updated packages, which contain
backported patches to correct these issues.
Summary
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
References
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0692 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-1893 http://www.redhat.com/security/updates/classification/#critical
Package List
Red Hat Enterprise Linux AS version 3:
Source:
i386:
dhclient-3.0.1-10.2_EL3.i386.rpm
dhcp-3.0.1-10.2_EL3.i386.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.i386.rpm
dhcp-devel-3.0.1-10.2_EL3.i386.rpm
ia64:
dhclient-3.0.1-10.2_EL3.ia64.rpm
dhcp-3.0.1-10.2_EL3.ia64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.ia64.rpm
dhcp-devel-3.0.1-10.2_EL3.ia64.rpm
ppc:
dhclient-3.0.1-10.2_EL3.ppc.rpm
dhcp-3.0.1-10.2_EL3.ppc.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.ppc.rpm
dhcp-devel-3.0.1-10.2_EL3.ppc.rpm
s390:
dhclient-3.0.1-10.2_EL3.s390.rpm
dhcp-3.0.1-10.2_EL3.s390.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.s390.rpm
dhcp-devel-3.0.1-10.2_EL3.s390.rpm
s390x:
dhclient-3.0.1-10.2_EL3.s390x.rpm
dhcp-3.0.1-10.2_EL3.s390x.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.s390x.rpm
dhcp-devel-3.0.1-10.2_EL3.s390x.rpm
x86_64:
dhclient-3.0.1-10.2_EL3.x86_64.rpm
dhcp-3.0.1-10.2_EL3.x86_64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.x86_64.rpm
dhcp-devel-3.0.1-10.2_EL3.x86_64.rpm
Red Hat Desktop version 3:
Source:
i386:
dhclient-3.0.1-10.2_EL3.i386.rpm
dhcp-3.0.1-10.2_EL3.i386.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.i386.rpm
dhcp-devel-3.0.1-10.2_EL3.i386.rpm
x86_64:
dhclient-3.0.1-10.2_EL3.x86_64.rpm
dhcp-3.0.1-10.2_EL3.x86_64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.x86_64.rpm
dhcp-devel-3.0.1-10.2_EL3.x86_64.rpm
Red Hat Enterprise Linux ES version 3:
Source:
i386:
dhclient-3.0.1-10.2_EL3.i386.rpm
dhcp-3.0.1-10.2_EL3.i386.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.i386.rpm
dhcp-devel-3.0.1-10.2_EL3.i386.rpm
ia64:
dhclient-3.0.1-10.2_EL3.ia64.rpm
dhcp-3.0.1-10.2_EL3.ia64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.ia64.rpm
dhcp-devel-3.0.1-10.2_EL3.ia64.rpm
x86_64:
dhclient-3.0.1-10.2_EL3.x86_64.rpm
dhcp-3.0.1-10.2_EL3.x86_64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.x86_64.rpm
dhcp-devel-3.0.1-10.2_EL3.x86_64.rpm
Red Hat Enterprise Linux WS version 3:
Source:
i386:
dhclient-3.0.1-10.2_EL3.i386.rpm
dhcp-3.0.1-10.2_EL3.i386.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.i386.rpm
dhcp-devel-3.0.1-10.2_EL3.i386.rpm
ia64:
dhclient-3.0.1-10.2_EL3.ia64.rpm
dhcp-3.0.1-10.2_EL3.ia64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.ia64.rpm
dhcp-devel-3.0.1-10.2_EL3.ia64.rpm
x86_64:
dhclient-3.0.1-10.2_EL3.x86_64.rpm
dhcp-3.0.1-10.2_EL3.x86_64.rpm
dhcp-debuginfo-3.0.1-10.2_EL3.x86_64.rpm
dhcp-devel-3.0.1-10.2_EL3.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://www.redhat.com/security/team/key/#package
Topic
Updated dhcp packages that fix two security issues are now available forRed Hat Enterprise Linux 3.This update has been rated as having critical security impact by the RedHat Security Response Team.
Topic
Relevant Releases Architectures
Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64
Red Hat Desktop version 3 - i386, x86_64
Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64
Bugs Fixed
507717 - CVE-2009-0692 dhclient: stack overflow leads to arbitrary code execution as root
510024 - CVE-2009-1893 dhcp: insecure temporary file use in the dhcpd init script