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Fencer Intel
high 7.5

CVE-2018-1111 in the critical feed json

DHCP packages in Red Hat Enterprise Linux 6 and 7, Fedora 28, and earlier are vulnerable to a command injection flaw in the NetworkManager…

published 2018-05-17 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-11756

cvss
7.5
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
97.9%
EPSS 97.9% chance of exploitation in 30 days, percentile 99.9%
public exploits
3
Metasploit, Exploit-DB

Summary

DHCP packages in Red Hat Enterprise Linux 6 and 7, Fedora 28, and earlier are vulnerable to a command injection flaw in the NetworkManager integration script included in the DHCP client. 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.

Patch / fix

  • rhvm-appliance RHEL 7 2:4.2-20180504.0.el7
  • redhat-virtualization-host RHEL 7 4.2-20180508.0.el7_5
  • imgbased RHEL 7 1.0.16-0.1.el7ev
  • ovirt-node-ng RHEL 7 4.2.0-0.20170814.0.el7
  • python-imgbased RHEL 7 1.0.16-0.1.el7ev
  • ovirt-node-ng-nodectl RHEL 7 4.2.0-0.20170814.0.el7
  • redhat-release-virtualization-host RHEL 7 4.2-3.0.el7
  • redhat-virtualization-host-image-update RHEL 7 4.2-20180508.0.el7_5

red hat advisories RHSA-2018:1525RHSA-2018:1524RHSA-2018:1461RHSA-2018:1460RHSA-2018:1459RHSA-2018:1457

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2018-1111 updated cvss 7.5

dhcp: Command injection vulnerability in the DHCP client NetworkManager integration script

  • Red Hat Enterprise Linux Client (v. 7) dhcp 4.2.5-68.el7_5.1, dhclient 4.2.5-68.el7_5.1, dhcp-libs 4.2.5-68.el7_5.1, dhcp-common 4.2.5-68.el7_5.1 Red Hat Enterprise Linux Client Optional (v. 7) dhcp 4.2.5-68.el7_5.1 Red Hat Enterprise Linux ComputeNode (v. 7) dhcp 4.2.5-68.el7_5.1, dhclient 4.2.5-68.el7_5.1, dhcp-libs 4.2.5-68.el7_5.1, dhcp-common 4.2.5-68.el7_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1453
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.3) dhcp 4.2.5-47.el7_3.1, dhclient 4.2.5-47.el7_3.1, dhcp-libs 4.2.5-47.el7_3.1, dhcp-common 4.2.5-47.el7_3.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1456
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.4) dhcp 4.2.5-58.el7_4.4, dhclient 4.2.5-58.el7_4.4, dhcp-libs 4.2.5-58.el7_4.4, dhcp-common 4.2.5-58.el7_4.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1455
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) dhcp 4.2.5-68.el7_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1453
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.3) dhcp 4.2.5-47.el7_3.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1456
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.4) dhcp 4.2.5-58.el7_4.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1455
  • Red Hat Enterprise Linux Desktop (v. 6) dhcp 4.1.1-53.P1.el6_9.4, dhclient 4.1.1-53.P1.el6_9.4, dhcp-common 4.1.1-53.P1.el6_9.4 Red Hat Enterprise Linux Desktop Optional (v. 6) dhcp 4.1.1-53.P1.el6_9.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1454
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) dhcp 4.2.5-68.el7_5.1, dhclient 4.2.5-68.el7_5.1, dhcp-libs 4.2.5-68.el7_5.1, dhcp-common 4.2.5-68.el7_5.1 Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) dhcp-devel 4.2.5-68.el7_5.1, dhcp-debuginfo 4.2.5-68.el7_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1453
show 26 more
  • Red Hat Enterprise Linux HPC Node (v. 6) dhcp 4.1.1-53.P1.el6_9.4, dhclient 4.1.1-53.P1.el6_9.4, dhcp-common 4.1.1-53.P1.el6_9.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1454
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.7) dhcp 4.1.1-49.P1.el6_7.1, dhclient 4.1.1-49.P1.el6_7.1, dhcp-common 4.1.1-49.P1.el6_7.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1458
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) dhcp 4.1.1-53.P1.el6_9.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1454
  • Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) dhcp 4.1.1-49.P1.el6_7.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1458
  • Red Hat Enterprise Linux Server (v. 6) dhcp 4.1.1-53.P1.el6_9.4, dhclient 4.1.1-53.P1.el6_9.4, dhcp-common 4.1.1-53.P1.el6_9.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1454
  • Red Hat Enterprise Linux Server (v. 7) dhcp 4.2.5-68.el7_5.1, dhclient 4.2.5-68.el7_5.1, dhcp-libs 4.2.5-68.el7_5.1, dhcp-common 4.2.5-68.el7_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1453
  • Red Hat Enterprise Linux Server AUS (v. 6.4) dhcp 4.1.1-34.P1.el6_4.2, dhclient 4.1.1-34.P1.el6_4.2, dhcp-common 4.1.1-34.P1.el6_4.2
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1461
  • Red Hat Enterprise Linux Server AUS (v. 6.5) dhcp 4.1.1-38.P1.el6_5.1, dhclient 4.1.1-38.P1.el6_5.1, dhcp-common 4.1.1-38.P1.el6_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1460
  • Red Hat Enterprise Linux Server AUS (v. 6.6) dhcp 4.1.1-43.P1.el6_6.2, dhclient 4.1.1-43.P1.el6_6.2, dhcp-common 4.1.1-43.P1.el6_6.2
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1459
  • Red Hat Enterprise Linux Server AUS (v. 7.2) dhcp 4.2.5-42.el7_2.1, dhclient 4.2.5-42.el7_2.1, dhcp-libs 4.2.5-42.el7_2.1, dhcp-common 4.2.5-42.el7_2.1 Red Hat Enterprise Linux Server E4S (v. 7.2) dhcp 4.2.5-42.el7_2.1, dhclient 4.2.5-42.el7_2.1, dhcp-libs 4.2.5-42.el7_2.1, dhcp-common 4.2.5-42.el7_2.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1457
  • Red Hat Enterprise Linux Server EUS (v. 6.7) dhcp 4.1.1-49.P1.el6_7.1, dhclient 4.1.1-49.P1.el6_7.1, dhcp-common 4.1.1-49.P1.el6_7.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1458
  • Red Hat Enterprise Linux Server EUS (v. 7.3) dhcp 4.2.5-47.el7_3.1, dhclient 4.2.5-47.el7_3.1, dhcp-libs 4.2.5-47.el7_3.1, dhcp-common 4.2.5-47.el7_3.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1456
  • Red Hat Enterprise Linux Server EUS (v. 7.4) dhcp 4.2.5-58.el7_4.4, dhclient 4.2.5-58.el7_4.4, dhcp-libs 4.2.5-58.el7_4.4, dhcp-common 4.2.5-58.el7_4.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1455
  • Red Hat Enterprise Linux Server Optional (v. 6) dhcp-devel 4.1.1-53.P1.el6_9.4, dhcp-debuginfo 4.1.1-53.P1.el6_9.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1454
  • Red Hat Enterprise Linux Server Optional (v. 7) dhcp-devel 4.2.5-68.el7_5.1, dhcp-debuginfo 4.2.5-68.el7_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1453
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.4) dhcp 4.1.1-34.P1.el6_4.2
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1461
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.5) dhcp 4.1.1-38.P1.el6_5.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1460
  • Red Hat Enterprise Linux Server Optional AUS (v. 6.6) dhcp-devel 4.1.1-43.P1.el6_6.2, dhcp-debuginfo 4.1.1-43.P1.el6_6.2
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1459
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) dhcp-devel 4.2.5-42.el7_2.1, dhcp-debuginfo 4.2.5-42.el7_2.1 Red Hat Enterprise Linux Server Optional E4S (v. 7.2) dhcp-devel 4.2.5-42.el7_2.1, dhcp-debuginfo 4.2.5-42.el7_2.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1457
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.7) dhcp-devel 4.1.1-49.P1.el6_7.1, dhcp-debuginfo 4.1.1-49.P1.el6_7.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1458
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.3) dhcp-devel 4.2.5-47.el7_3.1, dhcp-debuginfo 4.2.5-47.el7_3.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1456
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.4) dhcp-devel 4.2.5-58.el7_4.4, dhcp-debuginfo 4.2.5-58.el7_4.4
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1455
  • Red Hat Enterprise Linux Server Optional TUS (v. 6.6) dhcp-devel 4.1.1-43.P1.el6_6.2, dhcp-debuginfo 4.1.1-43.P1.el6_6.2
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1459
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.2) dhcp-devel 4.2.5-42.el7_2.1, dhcp-debuginfo 4.2.5-42.el7_2.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1457
  • Red Hat Enterprise Linux Server TUS (v. 6.6) dhcp 4.1.1-43.P1.el6_6.2, dhclient 4.1.1-43.P1.el6_6.2, dhcp-common 4.1.1-43.P1.el6_6.2
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1459
  • Red Hat Enterprise Linux Server TUS (v. 7.2) dhcp 4.2.5-42.el7_2.1, dhclient 4.2.5-42.el7_2.1, dhcp-libs 4.2.5-42.el7_2.1, dhcp-common 4.2.5-42.el7_2.1
    fixed: vendor fix “Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.” RHSA-2018:1457

7 more fixed, 2 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/unix/dhcp/rhel_dhcp_client_command_injection)
  2. Published

Exploit prediction

97.86% chance of exploitation in the next 30 days, higher than 99.9% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
CNA 3.0 7.5 CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.0 7.5 CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.9 AV:A/AC:M/Au:N/C:C/I:C/A:C

Affected products

  • Red Hat dhcp
  • Fedora dhcp

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.