Issued:
2018-05-15
Updated:
2018-05-15

RHSA-2018:1458 - Security Advisory

Synopsis

Critical: dhcp security update

Type/Severity

Security Advisory: Critical

Topic

An update for dhcp is now available for Red Hat Enterprise Linux 6.7 Extended 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 - Extended Update Support 6.7 x86_64
  • Red Hat Enterprise Linux Server - Extended Update Support 6.7 i386
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.7 s390x
  • Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.7 ppc64
  • Red Hat Enterprise Linux EUS Compute Node 6.7 x86_64

Fixes

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

CVEs

References

Red Hat Enterprise Linux Server - Extended Update Support 6.7

SRPM
dhcp-4.1.1-49.P1.el6_7.1.src.rpm SHA-256: 262b8d1e013f92d4b559ba2a86b282fa099672c5f1411f1b1fb9d25b834ec405
x86_64
dhclient-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: cea681fc26bdee70a25651d98c461d7f00ab0332d7173afb19bf3a4cba941363
dhcp-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: d01e215f22a61f924d4d46feb650c0a4df9ad1610c4d39e3373dc39bb811e4b2
dhcp-common-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: 19cf027b03b06f93bb3030e99b584766ee7109f8b584375c9c536797779e2268
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 5973fd1a385ccc62cb91177fcedaf78f0ece4f214d9d218d1cc994dbc61ac867
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: c5c9a759f28cd044f706750a851cecbdffa4430d4aaac70b5a460f3cff219b59
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: c5c9a759f28cd044f706750a851cecbdffa4430d4aaac70b5a460f3cff219b59
dhcp-devel-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: a47baeef95aa22e3ec3a0d997a8deb06b589cfdd8a348e2a497da54ffc410df0
dhcp-devel-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: 2c3e66de29fd04b55011b08873f6a5934d77fddf24ba2c1f33a38e8d80711812
i386
dhclient-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 3f897e24f90b5b58a1f3e0e764a19eae26f88c0e4e265ed09760614b2b6b3320
dhcp-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 93cff1bf20f880077b69781c8099c792421551fcedd07509f223de2edef6d2b7
dhcp-common-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 864e0c1721e3c0467a8eadeb619ddb84f5c8aebcdbb9d0350e75089d0803877b
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 5973fd1a385ccc62cb91177fcedaf78f0ece4f214d9d218d1cc994dbc61ac867
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 5973fd1a385ccc62cb91177fcedaf78f0ece4f214d9d218d1cc994dbc61ac867
dhcp-devel-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: a47baeef95aa22e3ec3a0d997a8deb06b589cfdd8a348e2a497da54ffc410df0

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 6.7

SRPM
dhcp-4.1.1-49.P1.el6_7.1.src.rpm SHA-256: 262b8d1e013f92d4b559ba2a86b282fa099672c5f1411f1b1fb9d25b834ec405
s390x
dhclient-4.1.1-49.P1.el6_7.1.s390x.rpm SHA-256: af20b0e05f1e1b2128ae3f40e643af0c91b010730bff978d5bd41b84af55bb19
dhcp-4.1.1-49.P1.el6_7.1.s390x.rpm SHA-256: 453b6136923d8345c07ab02ba07cfc757503d7378127111abacf6f9a76747d5b
dhcp-common-4.1.1-49.P1.el6_7.1.s390x.rpm SHA-256: f9ad8f010e302bedec133fce6076093e11da917d422ce3ed7e3969ff8b444f0d
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.s390.rpm SHA-256: 95a109d213fc2b2d81672eb956d51fad0623d810e1823879d923f38716f48b3a
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.s390x.rpm SHA-256: 1114b5dc9b5165086b3468686f5a6dfdce89b08bb89af73a69ee93203bb8ec9c
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.s390x.rpm SHA-256: 1114b5dc9b5165086b3468686f5a6dfdce89b08bb89af73a69ee93203bb8ec9c
dhcp-devel-4.1.1-49.P1.el6_7.1.s390.rpm SHA-256: 6f4ae0f2366db032afb2392230044b4331b4413bd781433bcec3f6bcffc6287c
dhcp-devel-4.1.1-49.P1.el6_7.1.s390x.rpm SHA-256: 3410a8f569277fcea572968ef93b35650732f2b5e5c7d446eaea60d507054834

Red Hat Enterprise Linux for Power, big endian - Extended Update Support 6.7

SRPM
dhcp-4.1.1-49.P1.el6_7.1.src.rpm SHA-256: 262b8d1e013f92d4b559ba2a86b282fa099672c5f1411f1b1fb9d25b834ec405
ppc64
dhclient-4.1.1-49.P1.el6_7.1.ppc64.rpm SHA-256: c29594618f368b646296403364c434926a1deb26c20169cf053ebacaaf984885
dhcp-4.1.1-49.P1.el6_7.1.ppc64.rpm SHA-256: 1ab9de533cd1a110711896b81d8aae4b6d674d49e61fca5e720e146a467ee60e
dhcp-common-4.1.1-49.P1.el6_7.1.ppc64.rpm SHA-256: cbc13c8db35200af3edd1e09bd072a73112d2f6bb15c7f7607432dbd1860e373
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.ppc.rpm SHA-256: 2674c41617f2546c50afeee0c2b63901794284838aa20f9101682dd637466a82
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.ppc64.rpm SHA-256: fd19c2ec96b665d56429609a432ed5c101dfa5a679745546c38df3a9add01d0b
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.ppc64.rpm SHA-256: fd19c2ec96b665d56429609a432ed5c101dfa5a679745546c38df3a9add01d0b
dhcp-devel-4.1.1-49.P1.el6_7.1.ppc.rpm SHA-256: 4e52e748a37812f50ea84b7682d8df9818e05b4ac80fc34217edcce4da38685a
dhcp-devel-4.1.1-49.P1.el6_7.1.ppc64.rpm SHA-256: 8c60b49e97e02cf549af2334cd1566a0bc1535d11384b35345ee41a65f5f08c3

Red Hat Enterprise Linux EUS Compute Node 6.7

SRPM
dhcp-4.1.1-49.P1.el6_7.1.src.rpm SHA-256: 262b8d1e013f92d4b559ba2a86b282fa099672c5f1411f1b1fb9d25b834ec405
x86_64
dhclient-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: cea681fc26bdee70a25651d98c461d7f00ab0332d7173afb19bf3a4cba941363
dhcp-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: d01e215f22a61f924d4d46feb650c0a4df9ad1610c4d39e3373dc39bb811e4b2
dhcp-common-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: 19cf027b03b06f93bb3030e99b584766ee7109f8b584375c9c536797779e2268
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: 5973fd1a385ccc62cb91177fcedaf78f0ece4f214d9d218d1cc994dbc61ac867
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: c5c9a759f28cd044f706750a851cecbdffa4430d4aaac70b5a460f3cff219b59
dhcp-debuginfo-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: c5c9a759f28cd044f706750a851cecbdffa4430d4aaac70b5a460f3cff219b59
dhcp-devel-4.1.1-49.P1.el6_7.1.i686.rpm SHA-256: a47baeef95aa22e3ec3a0d997a8deb06b589cfdd8a348e2a497da54ffc410df0
dhcp-devel-4.1.1-49.P1.el6_7.1.x86_64.rpm SHA-256: 2c3e66de29fd04b55011b08873f6a5934d77fddf24ba2c1f33a38e8d80711812

The Red Hat security contact is secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.