CVE-2020-25842 : Vulnerability Insights and Analysis

NHIServiSignAdapter by CHANGING Inc. on Windows is vulnerable to arbitrary file access due to a flaw in file path verification.

Understanding CVE-2020-25842

This CVE involves a critical vulnerability in NHIServiSignAdapter that allows remote attackers to access arbitrary files without privilege.

What is CVE-2020-25842?

The encryption function of NHIServiSignAdapter fails to verify user-input file paths, enabling remote attackers to access arbitrary files on the system.

The Impact of CVE-2020-25842

CVSS Base Score: 7.5 (High Severity)
Confidentiality Impact: High
Attack Vector: Network
Attack Complexity: Low
This vulnerability poses a significant risk to the confidentiality of sensitive information stored on affected systems.

Technical Details of CVE-2020-25842

NHIServiSignAdapter version 1.0.20.0218 on Windows is susceptible to arbitrary file access due to inadequate file path validation.

Vulnerability Description

The flaw in NHIServiSignAdapter allows attackers to access arbitrary files without requiring any special privileges, compromising the confidentiality of sensitive data.

Affected Systems and Versions

Affected Platform: Windows
Affected Product: NHIServiSignAdapter
Vulnerable Version: 1.0.20.0218

Exploitation Mechanism

Attackers can exploit this vulnerability remotely over the network without the need for user interaction, making it a severe threat to data confidentiality.

Mitigation and Prevention

To address CVE-2020-25842, immediate actions and long-term security practices are crucial.

Immediate Steps to Take

Update NHIServiSignAdapter to version 1.0.20.1109 to mitigate the vulnerability.

Long-Term Security Practices

Implement strict input validation mechanisms to prevent similar file access vulnerabilities.
Regularly monitor and audit file access permissions to detect unauthorized activities.

Patching and Updates

Regularly apply security patches and updates to ensure the system is protected against known vulnerabilities.