Issued:

2018-01-25

Updated:

2018-01-25

RHSA-2018:0158 - Moderate: dhcp security update

Synopsis

Moderate: dhcp security update

Type/Severity

Security Advisory Moderate

Topic

An update for dhcp is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

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. The dhcp packages provide a relay agent and ISC DHCP service required to enable and administer DHCP on a network.

Security Fix(es):

• It was found that the DHCP daemon did not properly clean up closed OMAPI connections in certain cases. A remote attacker able to connect to the OMAPI port could use this flaw to exhaust file descriptors in the DHCP daemon, leading to a denial of service in the OMAPI functionality. (CVE-2017-3144)

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

Affected Products

Updated Packages

• dhcp-common-4.2.5-58.el7_4.1.ppc64.rpm
• dhcp-4.2.5-58.el7_4.1.s390x.rpm
• dhcp-common-4.2.5-58.el7_4.1.aarch64.rpm
• dhclient-4.2.5-58.el7_4.1.ppc64.rpm
• dhcp-devel-4.2.5-58.el7_4.1.i686.rpm
• dhcp-4.2.5-58.el7_4.1.ppc64.rpm
• dhcp-common-4.2.5-58.el7_4.1.ppc64le.rpm
• dhcp-devel-4.2.5-58.el7_4.1.ppc64le.rpm
• dhcp-libs-4.2.5-58.el7_4.1.ppc.rpm
• dhcp-libs-4.2.5-58.el7_4.1.s390.rpm
• dhclient-4.2.5-58.el7_4.1.aarch64.rpm
• dhcp-libs-4.2.5-58.el7_4.1.ppc64le.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.s390x.rpm
• dhcp-devel-4.2.5-58.el7_4.1.x86_64.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.ppc64le.rpm
• dhcp-devel-4.2.5-58.el7_4.1.aarch64.rpm
• dhcp-libs-4.2.5-58.el7_4.1.i686.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.x86_64.rpm
• dhcp-devel-4.2.5-58.el7_4.1.s390.rpm
• dhcp-devel-4.2.5-58.el7_4.1.ppc.rpm
• dhcp-4.2.5-58.el7_4.1.aarch64.rpm
• dhcp-libs-4.2.5-58.el7_4.1.x86_64.rpm
• dhcp-libs-4.2.5-58.el7_4.1.aarch64.rpm
• dhcp-common-4.2.5-58.el7_4.1.s390x.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.i686.rpm
• dhclient-4.2.5-58.el7_4.1.ppc64le.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.ppc.rpm
• dhclient-4.2.5-58.el7_4.1.s390x.rpm
• dhcp-devel-4.2.5-58.el7_4.1.s390x.rpm
• dhclient-4.2.5-58.el7_4.1.x86_64.rpm
• dhcp-common-4.2.5-58.el7_4.1.x86_64.rpm
• dhcp-4.2.5-58.el7_4.1.src.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.s390.rpm
• dhcp-4.2.5-58.el7_4.1.ppc64le.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.ppc64.rpm
• dhcp-4.2.5-58.el7_4.1.x86_64.rpm
• dhcp-libs-4.2.5-58.el7_4.1.ppc64.rpm
• dhcp-debuginfo-4.2.5-58.el7_4.1.aarch64.rpm
• dhcp-libs-4.2.5-58.el7_4.1.s390x.rpm
• dhcp-devel-4.2.5-58.el7_4.1.ppc64.rpm

Fixes

• This content is not included.BZ - 1522918

CVEs

• CVE-2017-3144

References

• https://access.redhat.com/security/updates/classification/#moderate
• Content from kb.isc.org is not included.Content from kb.isc.org is not included.https://kb.isc.org/article/AA-01541

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.