CVE-2020-25843 : Security Advisory and Response

NHIServiSignAdapter by CHANGING Inc. on Windows is affected by a heap overflow vulnerability due to improper path length verification, allowing remote attackers to execute code without privilege.

Understanding CVE-2020-25843

NHIServiSignAdapter on Windows is susceptible to a heap overflow issue, potentially leading to unauthorized code execution.

What is CVE-2020-25843?

NHIServiSignAdapter fails to validate the length of digital credential file paths, creating a heap overflow vulnerability that can be exploited by remote attackers to run code without privileges.

The Impact of CVE-2020-25843

CVSS Base Score: 8.1 (High)
Attack Vector: Network
Attack Complexity: High
Privileges Required: None
Confidentiality, Integrity, and Availability Impact: High

Technical Details of CVE-2020-25843

NHIServiSignAdapter's vulnerability specifics and affected systems.

Vulnerability Description

The vulnerability stems from the failure to verify the length of digital credential file paths, leading to a heap overflow loophole.

Affected Systems and Versions

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

Exploitation Mechanism

Attackers can exploit the heap overflow vulnerability to execute code remotely without requiring any special privileges.

Mitigation and Prevention

Steps to address and prevent the CVE-2020-25843 vulnerability.

Immediate Steps to Take

Update NHIServiSignAdapter to version 1.0.20.1109

Long-Term Security Practices

Regularly monitor and update software to patch vulnerabilities
Implement network security measures to prevent unauthorized access
Conduct security audits and assessments periodically

Patching and Updates

Apply vendor-provided patches promptly to mitigate the risk of exploitation