Synopsis

Critical: dhcp security update

Type/Severity

Security Advisory: Critical

Topic

An update for dhcp is now available for Red Hat Enterprise Linux 6.4 Advanced Update Support.

Red Hat Product Security has rated this update as having a security impact of Critical. 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):

• A command injection flaw was found in the NetworkManager integration script included in the DHCP client packages in Red Hat Enterprise Linux. A malicious DHCP server, or an attacker on the local network able to spoof DHCP responses, could use this flaw to execute arbitrary commands with root privileges on systems using NetworkManager and configured to obtain network configuration using the DHCP protocol. (CVE-2018-1111)
  

Red Hat would like to thank Felix Wilhelm (Google Security Team) for reporting this issue.

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

• Red Hat Enterprise Linux Server - AUS 6.4 x86_64

Fixes

• BZ - 1567974 - CVE-2018-1111 dhcp: Command injection vulnerability in the DHCP client NetworkManager integration script

CVEs

• CVE-2018-1111

References

• https://access.redhat.com/security/updates/classification/#critical
• https://access.redhat.com/security/vulnerabilities/3442151

Red Hat Enterprise Linux Server - AUS 6.4

SRPM
dhcp-4.1.1-34.P1.el6_4.2.src.rpm	SHA-256: 78e431ca3a5d5bdf17adb2f0f02aff5781ad0a0aebe8b9fae9dfffb9757a5803
x86_64
dhclient-4.1.1-34.P1.el6_4.2.x86_64.rpm	SHA-256: e0e98c78cd1406f790bc5615afab0edb825d257eb7f53a336cbf97bc80e95119
dhcp-4.1.1-34.P1.el6_4.2.x86_64.rpm	SHA-256: a707f2f90755c69958c2afbd45b3d71384370315ffaef64ce1ef4f0a71355bc6
dhcp-common-4.1.1-34.P1.el6_4.2.x86_64.rpm	SHA-256: 74976ef7117cf93fba91f9501669bb7e7ae01850d9db4468b53ce1a7d33ec68a
dhcp-debuginfo-4.1.1-34.P1.el6_4.2.i686.rpm	SHA-256: 76aab799ac28b89f17ca8fd9d1d3ef6d160a786a6f8b15cfc3d7cd74d39fe51c
dhcp-debuginfo-4.1.1-34.P1.el6_4.2.x86_64.rpm	SHA-256: 7dabdc9376cfe7851f48393d8931c4372ddd2e20e358b702fc559eb644206192
dhcp-debuginfo-4.1.1-34.P1.el6_4.2.x86_64.rpm	SHA-256: 7dabdc9376cfe7851f48393d8931c4372ddd2e20e358b702fc559eb644206192
dhcp-devel-4.1.1-34.P1.el6_4.2.i686.rpm	SHA-256: bef4dac7b34afd4f592d87b81559817273ba4be70e360bf8c6c5a948f005c177
dhcp-devel-4.1.1-34.P1.el6_4.2.x86_64.rpm	SHA-256: f369e36d6415f2b10b26a4b17aa9564f33f20e3fe265c6b2820e78242ad57da5