CVE-2018-1111
HIGHCVE-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. O3 Security detects and blocks CVE-2018-1111 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
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.…
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
fedorafedoraprojectenterprise linuxredhatenterprise linux desktopredhatenterprise linux serverredhatenterprise linux workstationredhatenterprise virtualizationredhatResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
DynoRoot DHCP Client - Command Injection
by Kevin Kirsche · May 18, 2018
DHCP Client - Command Injection 'DynoRoot' (Metasploit)
by Metasploit · Jun 13, 2018
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every fedoraproject fedora deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for remote code execution at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
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.
Mitigate without a patch
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2018-1111 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2018-1111. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2018-1111 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2018-1111 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.