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===================================================================== Red Hat Security Advisory
Synopsis: Important: dhcp security update Advisory ID: RHSA-2011:0428-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-0428.html Issue date: 2011-04-08 CVE Names: CVE-2011-0997 =====================================================================
1. Summary:
Updated dhcp packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6.
The Red Hat Security Response Team has rated this update as having important 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 AS version 4 - i386, ia64, ppc, s390, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64 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 Desktop version 4 - i386, x86_64 Red Hat Enterprise Linux ES version 4 - i386, ia64, 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 WS version 4 - i386, ia64, 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 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.
It was discovered that the DHCP client daemon, dhclient, did not sufficiently sanitize certain options provided in DHCP server replies, such as the client hostname. A malicious DHCP server could send such an option with a specially-crafted value to a DHCP client. If this option's value was saved on the client system, and then later insecurely evaluated by a process that assumes the option is trusted, it could lead to arbitrary code execution with the privileges of that process. (CVE-2011-0997)
Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting this issue.
All dhclient users should upgrade to these updated packages, which contain a backported patch to correct this issue.
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/):
689832 - CVE-2011-0997 dhclient: insufficient sanitization of certain DHCP response values
6. Package List:
Red Hat Enterprise Linux AS version 4:
Source: ftp://updates.redhat.com/enterprise/4AS/en/os/SRPMS/dhcp-3.0.1-67.el4.src.rpm
i386: dhclient-3.0.1-67.el4.i386.rpm dhcp-3.0.1-67.el4.i386.rpm dhcp-debuginfo-3.0.1-67.el4.i386.rpm dhcp-devel-3.0.1-67.el4.i386.rpm
ia64: dhclient-3.0.1-67.el4.ia64.rpm dhcp-3.0.1-67.el4.ia64.rpm dhcp-debuginfo-3.0.1-67.el4.ia64.rpm dhcp-devel-3.0.1-67.el4.ia64.rpm
ppc: dhclient-3.0.1-67.el4.ppc.rpm dhcp-3.0.1-67.el4.ppc.rpm dhcp-debuginfo-3.0.1-67.el4.ppc.rpm dhcp-devel-3.0.1-67.el4.ppc.rpm
s390: dhclient-3.0.1-67.el4.s390.rpm dhcp-3.0.1-67.el4.s390.rpm dhcp-debuginfo-3.0.1-67.el4.s390.rpm dhcp-devel-3.0.1-67.el4.s390.rpm
s390x: dhclient-3.0.1-67.el4.s390x.rpm dhcp-3.0.1-67.el4.s390x.rpm dhcp-debuginfo-3.0.1-67.el4.s390x.rpm dhcp-devel-3.0.1-67.el4.s390x.rpm
x86_64: dhclient-3.0.1-67.el4.x86_64.rpm dhcp-3.0.1-67.el4.x86_64.rpm dhcp-debuginfo-3.0.1-67.el4.x86_64.rpm dhcp-devel-3.0.1-67.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source: dhcp-3.0.1-67.el4.src.rpm
i386: dhclient-3.0.1-67.el4.i386.rpm dhcp-3.0.1-67.el4.i386.rpm dhcp-debuginfo-3.0.1-67.el4.i386.rpm dhcp-devel-3.0.1-67.el4.i386.rpm
x86_64: dhclient-3.0.1-67.el4.x86_64.rpm dhcp-3.0.1-67.el4.x86_64.rpm dhcp-debuginfo-3.0.1-67.el4.x86_64.rpm dhcp-devel-3.0.1-67.el4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source: ftp://updates.redhat.com/enterprise/4ES/en/os/SRPMS/dhcp-3.0.1-67.el4.src.rpm
i386: dhclient-3.0.1-67.el4.i386.rpm dhcp-3.0.1-67.el4.i386.rpm dhcp-debuginfo-3.0.1-67.el4.i386.rpm dhcp-devel-3.0.1-67.el4.i386.rpm
ia64: dhclient-3.0.1-67.el4.ia64.rpm dhcp-3.0.1-67.el4.ia64.rpm dhcp-debuginfo-3.0.1-67.el4.ia64.rpm dhcp-devel-3.0.1-67.el4.ia64.rpm
x86_64: dhclient-3.0.1-67.el4.x86_64.rpm dhcp-3.0.1-67.el4.x86_64.rpm dhcp-debuginfo-3.0.1-67.el4.x86_64.rpm dhcp-devel-3.0.1-67.el4.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
Source: ftp://updates.redhat.com/enterprise/4WS/en/os/SRPMS/dhcp-3.0.1-67.el4.src.rpm
i386: dhclient-3.0.1-67.el4.i386.rpm dhcp-3.0.1-67.el4.i386.rpm dhcp-debuginfo-3.0.1-67.el4.i386.rpm dhcp-devel-3.0.1-67.el4.i386.rpm
ia64: dhclient-3.0.1-67.el4.ia64.rpm dhcp-3.0.1-67.el4.ia64.rpm dhcp-debuginfo-3.0.1-67.el4.ia64.rpm dhcp-devel-3.0.1-67.el4.ia64.rpm
x86_64: dhclient-3.0.1-67.el4.x86_64.rpm dhcp-3.0.1-67.el4.x86_64.rpm dhcp-debuginfo-3.0.1-67.el4.x86_64.rpm dhcp-devel-3.0.1-67.el4.x86_64.rpm
Red Hat Enterprise Linux Desktop (v. 5 client):
Source: dhcp-3.0.5-23.el5_6.4.src.rpm
i386: dhclient-3.0.5-23.el5_6.4.i386.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-3.0.5-23.el5_6.4.i386.rpm
x86_64: dhclient-3.0.5-23.el5_6.4.x86_64.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.i386.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.x86_64.rpm libdhcp4client-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-3.0.5-23.el5_6.4.x86_64.rpm
RHEL Desktop Workstation (v. 5 client):
Source: dhcp-3.0.5-23.el5_6.4.src.rpm
i386: dhcp-3.0.5-23.el5_6.4.i386.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.i386.rpm dhcp-devel-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.i386.rpm
x86_64: dhcp-3.0.5-23.el5_6.4.x86_64.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.i386.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.x86_64.rpm dhcp-devel-3.0.5-23.el5_6.4.i386.rpm dhcp-devel-3.0.5-23.el5_6.4.x86_64.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source: dhcp-3.0.5-23.el5_6.4.src.rpm
i386: dhclient-3.0.5-23.el5_6.4.i386.rpm dhcp-3.0.5-23.el5_6.4.i386.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.i386.rpm dhcp-devel-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.i386.rpm
ia64: dhclient-3.0.5-23.el5_6.4.ia64.rpm dhcp-3.0.5-23.el5_6.4.ia64.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.ia64.rpm dhcp-devel-3.0.5-23.el5_6.4.ia64.rpm libdhcp4client-3.0.5-23.el5_6.4.ia64.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.ia64.rpm
ppc: dhclient-3.0.5-23.el5_6.4.ppc.rpm dhcp-3.0.5-23.el5_6.4.ppc.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.ppc.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.ppc64.rpm dhcp-devel-3.0.5-23.el5_6.4.ppc.rpm dhcp-devel-3.0.5-23.el5_6.4.ppc64.rpm libdhcp4client-3.0.5-23.el5_6.4.ppc.rpm libdhcp4client-3.0.5-23.el5_6.4.ppc64.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.ppc.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.ppc64.rpm
s390x: dhclient-3.0.5-23.el5_6.4.s390x.rpm dhcp-3.0.5-23.el5_6.4.s390x.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.s390.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.s390x.rpm dhcp-devel-3.0.5-23.el5_6.4.s390.rpm dhcp-devel-3.0.5-23.el5_6.4.s390x.rpm libdhcp4client-3.0.5-23.el5_6.4.s390.rpm libdhcp4client-3.0.5-23.el5_6.4.s390x.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.s390.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.s390x.rpm
x86_64: dhclient-3.0.5-23.el5_6.4.x86_64.rpm dhcp-3.0.5-23.el5_6.4.x86_64.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.i386.rpm dhcp-debuginfo-3.0.5-23.el5_6.4.x86_64.rpm dhcp-devel-3.0.5-23.el5_6.4.i386.rpm dhcp-devel-3.0.5-23.el5_6.4.x86_64.rpm libdhcp4client-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-3.0.5-23.el5_6.4.x86_64.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.i386.rpm libdhcp4client-devel-3.0.5-23.el5_6.4.x86_64.rpm
Red Hat Enterprise Linux Desktop (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
i386: dhclient-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm
x86_64: dhclient-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
i386: dhcp-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm
x86_64: dhcp-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
x86_64: dhclient-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
x86_64: dhcp-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
i386: dhclient-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm
ppc64: dhclient-4.1.1-12.P1.el6_0.4.ppc64.rpm dhcp-4.1.1-12.P1.el6_0.4.ppc64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.ppc64.rpm
s390x: dhclient-4.1.1-12.P1.el6_0.4.s390x.rpm dhcp-4.1.1-12.P1.el6_0.4.s390x.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.s390x.rpm
x86_64: dhclient-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
i386: dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm
ppc64: dhcp-debuginfo-4.1.1-12.P1.el6_0.4.ppc.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.ppc64.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.ppc.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.ppc64.rpm
s390x: dhcp-debuginfo-4.1.1-12.P1.el6_0.4.s390.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.s390x.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.s390.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.s390x.rpm
x86_64: dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
i386: dhclient-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm
x86_64: dhclient-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
Source: dhcp-4.1.1-12.P1.el6_0.4.src.rpm
i386: dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm
x86_64: dhcp-debuginfo-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-debuginfo-4.1.1-12.P1.el6_0.4.x86_64.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.i686.rpm dhcp-devel-4.1.1-12.P1.el6_0.4.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-2011-0997.html https://access.redhat.com/security/updates/classification/#important
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/
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