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HIGH severity

CVE-2018-1111 — FEDORA

HIGH

CVE-2018-1111 is a high-severity (CVSS 7.5) CWE-77 vulnerability in fedoraproject fedora. 12 public exploit references exist, so weaponization risk is real. No vendor fix is recorded yet; mitigation options are listed below.

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.…

Published
Updated
Affected
7 products
Patched
See advisory
Exploits
12 known
Exploitation data as of Oct 28, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
97.9%probability of exploitation in next 30 days
Very High Risk0.00%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
85.3%90.2%95.1%100.0%89.2%97.9%Apr 26Jul 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2018-1111 by exploitation likelihood (EPSS) against impact (CVSS). In the shaded patch-first corner (EPSS 50%+, CVSS 7.0+).

Where this sits among everything scored

Of 397,508 CVEs with a current EPSS score, this one falls in the ≥ 90% band (highlighted). Counts from FIRST.org, log-scaled.

Description

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.

Affected Products

7 products · 22 configurations
OS
fedorafedoraproject
3 versions
262728
OS
enterprise linuxredhat
10 versions
6.06.46.56.66.77.07.27.37.47.5
OS
enterprise linux desktopredhat
2 versions
6.07.0
OS
enterprise linux serverredhat
2 versions
6.07.0
OS
enterprise linux workstationredhat
2 versions
6.07.0
Application
enterprise virtualizationredhat
2 versions
4.04.2
Exploits & PoCs
12

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

EDB-44652locallinux✓ Verified

DynoRoot DHCP Client - Command Injection

by Kevin Kirsche · May 18, 2018

Exploit-DB Source
EDB-44890remotelinux✓ Verified

DHCP Client - Command Injection 'DynoRoot' (Metasploit)

by Metasploit · Jun 13, 2018

Exploit-DB Source

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every fedoraproject fedora deployment and check each version against the affected-products list above.

  2. Remediation status

    No patch has shipped for CVE-2018-1111 yet — track the fedoraproject fedora advisory for a fixed release and apply the workarounds below in the meantime.

  3. Mitigate without a patch

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatCritical

Red Hat has been made aware of a vulnerability affecting the DHCP client packages as shipped with Red Hat Enterprise Linux 6 and 7. This vulnerability CVE-2018-1111 was rated as having a security impact of Critical. A malicious DHCP server, or an attacker on the local network able to spoof DHCP responses, could use…

Workaround published by Red Hat
Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.
Source: Red Hat security advisory for CVE-2018-1111 (CC BY 4.0)
ProductFixed inAdvisory
Red Hat Enterprise Linux 6dhcp-12:4.1.1-53.P1.el6_9.4RHSA-2018:1454
Red Hat Enterprise Linux 6.4 Advanced Update Supportdhcp-12:4.1.1-34.P1.el6_4.2RHSA-2018:1461
Red Hat Enterprise Linux 6.5 Advanced Update Supportdhcp-12:4.1.1-38.P1.el6_5.1RHSA-2018:1460
Red Hat Enterprise Linux 6.6 Advanced Update Supportdhcp-12:4.1.1-43.P1.el6_6.2RHSA-2018:1459
Red Hat Enterprise Linux 6.7 Extended Update Supportdhcp-12:4.1.1-49.P1.el6_7.1RHSA-2018:1458
Red Hat Enterprise Linux 7dhcp-12:4.2.5-68.el7_5.1RHSA-2018:1453
Red Hat Enterprise Linux 7.2 Advanced Update Supportdhcp-12:4.2.5-42.el7_2.1RHSA-2018:1457
Red Hat Enterprise Linux 7.3 Extended Update Supportdhcp-12:4.2.5-47.el7_3.1RHSA-2018:1456

Frequently Asked Questions

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.
O3 Security · Runtime Protection

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CVE-2018-1111: FEDORA (High 7.5)