CVE-2020-17408 : Security Advisory and Response

This vulnerability allows remote attackers to disclose sensitive information on affected installations of NEC ExpressCluster 4.1 due to an XXE flaw in the clpwebmc executable.

Understanding CVE-2020-17408

This CVE involves a vulnerability in NEC ExpressCluster 4.1 that enables attackers to access sensitive data without authentication.

What is CVE-2020-17408?

The vulnerability in NEC ExpressCluster 4.1 allows remote attackers to reveal confidential information by exploiting an XXE flaw in the clpwebmc executable.

The Impact of CVE-2020-17408

The vulnerability has a CVSS base score of 7.5, indicating a high severity level with a significant impact on confidentiality.

Technical Details of CVE-2020-17408

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw arises from improper restriction of XML External Entity (XXE) references, allowing attackers to craft a document that triggers the XML parser to access a URI and embed its contents back into the XML document.

Affected Systems and Versions

Product: ExpressCluster
Vendor: NEC
Version: 4.1

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality Impact: High
Integrity Impact: None
Availability Impact: None

Mitigation and Prevention

Protecting systems from CVE-2020-17408 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor patches promptly
Implement network segmentation to limit exposure
Monitor and restrict external access to vulnerable components

Long-Term Security Practices

Regularly update and patch software
Conduct security assessments and audits
Educate users on secure practices

Patching and Updates

Refer to vendor advisories for patching instructions
Stay informed about security updates and best practices