RHEL 7 : dhcp (RHSA-2016:2590)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

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.

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) :

* A resource-consumption flaw was discovered in the DHCP server. dhcpd
did not restrict the number of open connections to OMAPI and failover
ports. A remote attacker able to establish TCP connections to one of
these ports could use this flaw to cause dhcpd to exit unexpectedly,
stop responding requests, or exhaust system sockets (denial of
service). (CVE-2016-2774)

Red Hat would like to thank ISC for reporting this issue.

Additional Changes :

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 7.3 Release Notes linked from the References section.

See also :

https://www.redhat.com/security/data/cve/CVE-2016-2774.html
http://www.nessus.org/u?e4086253
http://rhn.redhat.com/errata/RHSA-2016-2590.html

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.1
(CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C)
CVSS Temporal Score : 6.1
(CVSS2#E:F/RL:TF/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 94553 ()

Bugtraq ID:

CVE ID: CVE-2016-2774

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