RedHat: RHSA-2018-0469:01 Important: 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 dhcp packages provide a relay agent and ISC DHCP service
required to enable and administer DHCP on a network.
Security Fix(es):
* dhcp: Buffer overflow in dhclient possibly allowing code execution
triggered by malicious server (CVE-2018-5732)
* dhcp: Reference count overflow in dhcpd allows denial of service
(CVE-2018-5733)
For more details about the security issue(s), including the impact, a CVSS
score, and other related information, refer to the CVE page(s) listed in
the References section.
Red Hat would like to thank ISC for reporting these issues. Upstream
acknowledges Felix Wilhelm (Google) as the original reporter of these
issues.
Summary
Solution
For details on how to apply this update, which includes the changes
described in this advisory, refer to:
https://access.redhat.com/articles/11258
References
https://access.redhat.com/security/cve/CVE-2018-5732 https://access.redhat.com/security/cve/CVE-2018-5733 https://access.redhat.com/security/updates/classification/#important https://kb.isc.org/docs/aa-01565 https://kb.isc.org/docs/aa-01567
Package List
Red Hat Enterprise Linux Desktop (v. 6):
Source:
dhcp-4.1.1-53.P1.el6_9.3.src.rpm
i386:
dhclient-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
x86_64:
dhclient-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386:
dhcp-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
x86_64:
dhcp-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
dhcp-4.1.1-53.P1.el6_9.3.src.rpm
x86_64:
dhclient-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64:
dhcp-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
dhcp-4.1.1-53.P1.el6_9.3.src.rpm
i386:
dhclient-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
ppc64:
dhclient-4.1.1-53.P1.el6_9.3.ppc64.rpm
dhcp-4.1.1-53.P1.el6_9.3.ppc64.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.ppc64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.ppc64.rpm
s390x:
dhclient-4.1.1-53.P1.el6_9.3.s390x.rpm
dhcp-4.1.1-53.P1.el6_9.3.s390x.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.s390x.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.s390x.rpm
x86_64:
dhclient-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux Server Optional (v. 6):
i386:
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
ppc64:
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.ppc.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.ppc64.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.ppc.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.ppc64.rpm
s390x:
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.s390.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.s390x.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.s390.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.s390x.rpm
x86_64:
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
dhcp-4.1.1-53.P1.el6_9.3.src.rpm
i386:
dhclient-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
x86_64:
dhclient-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-common-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
Red Hat Enterprise Linux Workstation Optional (v. 6):
i386:
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
x86_64:
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-debuginfo-4.1.1-53.P1.el6_9.3.x86_64.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.i686.rpm
dhcp-devel-4.1.1-53.P1.el6_9.3.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/
Topic
An update for dhcp is now available for Red Hat Enterprise Linux 6.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.
Topic
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
Bugs Fixed
1549960 - CVE-2018-5732 dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
1549961 - CVE-2018-5733 dhcp: Reference count overflow in dhcpd allows denial of service