CVE-2018-11053 : Security Advisory and Response

Dell EMC iDRAC Service Module has an improper file permission vulnerability that allows unauthorized write access to the hosts file, potentially leading to traffic redirection to malicious sites.

Understanding CVE-2018-11053

When the iDRAC Service Module is launched, it changes the default file permission of the host operating system's hosts file (/etc/hosts) to allow write access by anyone, posing a security risk.

What is CVE-2018-11053?

The vulnerability in Dell EMC iDRAC Service Module enables users or processes with limited privileges to tamper with the hosts file, redirecting traffic to untrusted websites hosting harmful content.

The Impact of CVE-2018-11053

CVSS Base Score: 6.6 (Medium Severity)
Attack Vector: Local
Attack Complexity: High
Availability Impact: High
Confidentiality Impact: Low
Integrity Impact: Low
Privileges Required: Low
User Interaction: Required
Scope: Changed

Technical Details of CVE-2018-11053

The technical aspects of the vulnerability in Dell EMC iDRAC Service Module.

Vulnerability Description

The iDRAC Service Module changes the hosts file permission, allowing unauthorized write access, potentially leading to traffic redirection.

Affected Systems and Versions

Affected Product: iDRAC Service Module
Vendor: Dell EMC
Affected Versions: 3.0.1, 3.0.2, 3.1.0, 3.2.0

Exploitation Mechanism

Unauthorized users or processes with limited privileges can exploit the vulnerability to modify the hosts file and redirect traffic.

Mitigation and Prevention

Steps to mitigate and prevent the vulnerability in Dell EMC iDRAC Service Module.

Immediate Steps to Take

Monitor and restrict access to the hosts file
Regularly review file permissions and access controls
Implement least privilege principles for user access

Long-Term Security Practices

Conduct regular security audits and vulnerability assessments
Keep systems and software up to date with security patches

Patching and Updates

Apply patches and updates provided by Dell EMC to address the improper file permission vulnerability.