CVE-2018-1111

Impact:
Critical
Public Date:
2018-05-15
CWE:
CWE-77
Bugzilla:
1567974: CVE-2018-1111 dhcp: Command injection vulnerability in the DHCP client NetworkManager integration script
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.

Find out more about CVE-2018-1111 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

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 this flaw to execute arbitrary commands with root privileges on systems using NetworkManager and configured to obtain network configuration using the DHCP protocol.

Red Hat Enterprise Virtualization 4.1 includes the vulnerable components, but the default configuration is not impacted because NetworkManager is turned off in the Management Appliance, and not used in conjunction with DHCP in the Hypervisor. Customers can still obtain the updated packages from Red Hat Enterprise Linux channels using yum update, or upgrade to Red Hat Enterprise Virtualization 4.2, which includes the fixed packages.

Red Hat Enterprise Virtualization 3.6 is not vulnerable as it does not use DHCP.

CVSS v3 metrics

CVSS3 Base Score 7.5
CVSS3 Base Metrics CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Adjacent Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux Advanced Update Support 6.4 (dhcp) RHSA-2018:1461 2018-05-15
Red Hat Enterprise Linux Extended Update Support 7.3 (dhcp) RHSA-2018:1456 2018-05-15
Red Hat Enterprise Linux Advanced Update Support 6.6 (dhcp) RHSA-2018:1459 2018-05-15
Red Hat Enterprise Linux 6 (dhcp) RHSA-2018:1454 2018-05-15
Red Hat Enterprise Linux Extended Update Support 6.7 (dhcp) RHSA-2018:1458 2018-05-15
Red Hat Enterprise Linux Advanced Update Support 7.2 (dhcp) RHSA-2018:1457 2018-05-15
Red Hat Enterprise Linux Server TUS (v. 6.6) (dhcp) RHSA-2018:1459 2018-05-15
Red Hat Enterprise Linux 7 (dhcp) RHSA-2018:1453 2018-05-15
Red Hat Enterprise Linux Extended Update Support 7.4 (dhcp) RHSA-2018:1455 2018-05-15
Red Hat Enterprise Linux Server Update Services for SAP Solutions 7.2 (dhcp) RHSA-2018:1457 2018-05-15
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (rhvm-appliance) RHSA-2018:1525 2018-05-15
Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts RHSA-2018:1524 2018-05-15
Red Hat Enterprise Linux Advanced Update Support 6.5 (dhcp) RHSA-2018:1460 2018-05-15
Red Hat Enterprise Linux Server TUS (v. 7.2) (dhcp) RHSA-2018:1457 2018-05-15

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 5 dhcp Not affected

Acknowledgements

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

Mitigation

Please access https://access.redhat.com/security/vulnerabilities/3442151 for information on how to mitigate this issue.

External References

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