VDB-117876 · CVE-2018-1111 · RHSA-2018:1454

Red Hat Enterprise Linux 6/7 DHCP Package command injection

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.4	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as critical has been found in Red Hat Enterprise Linux 6/7. Affected by this vulnerability is an unknown functionality of the component DHCP Package. The manipulation results in command injection. This vulnerability is identified as CVE-2018-1111. The attack can be executed remotely. Additionally, an exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, was found in Red Hat Enterprise Linux 6/7 (Operating System). Affected is an unknown part of the component DHCP Package. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 05/16/2018. The weakness was released 05/17/2018 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is traded as CVE-2018-1111 since 12/04/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available. The MITRE ATT&CK project declares the attack technique as T1202.

The exploit is shared for download at exploit-db.com. It is declared as highly functional. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 109827 (Oracle Linux 6 : dhcp (ELSA-2018-1454)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351258 (Amazon Linux Security Advisory for dhcp: ALAS-2018-1024).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability. Attack attempts may be identified with Snort ID 46847.

The vulnerability is also documented in the databases at Exploit-DB (44652), Tenable (109827) and SecurityFocus (BID 104195†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Red Hat

Name

Enterprise Linux

Version

License

commercial

Website

Vendor: https://www.redhat.com/

CPE 2.3info

CPE 2.2info

Video

Open Video | Show More Videos

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Command injection
CWE: CWE-77 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Highly functional
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 109827
Nessus Name: Oracle Linux 6 : dhcp (ELSA-2018-1454)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 861004
OpenVAS Name: Fedora Update for dhcp FEDORA-2018-5392896132
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: redhat_dhcp_client_networkmanager
Saint Name: Red Hat DHCP client NetworkManager integration script command injection

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: rhel_dhcp_client_command_injection.rb
MetaSploit Name: DHCP Client Command Injection (DynoRoot)
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Snort ID: 46847
Snort Message: OS-LINUX Red Hat NetworkManager DHCP client command injection attempt
Snort Class: 🔍

Suricata ID: 2025765
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

12/04/2017 🔍
05/15/2018 +162 days 🔍
05/16/2018 +1 days 🔍
05/16/2018 +0 days 🔍
05/17/2018 +0 days 🔍
05/17/2018 +0 days 🔍
05/17/2018 +0 days 🔍
12/01/2024 +2390 days 🔍