CVE-2020-25844 : Exploit Details and Defense Strategies

NHIServiSignAdapter by CHANGING Inc. on Windows is affected by a stack overflow vulnerability due to unverified parameter length, allowing remote attackers to execute code without privilege.

Understanding CVE-2020-25844

NHIServiSignAdapter on Windows is susceptible to a stack overflow vulnerability, potentially leading to unauthorized code execution.

What is CVE-2020-25844?

The vulnerability in NHIServiSignAdapter arises from unchecked parameter length during digest generation, enabling a stack overflow exploit by remote threat actors.

The Impact of CVE-2020-25844

The vulnerability poses a high risk with a CVSS base score of 8.1, allowing attackers to execute code without requiring any privileges, compromising confidentiality, integrity, and availability.

Technical Details of CVE-2020-25844

NHIServiSignAdapter version 1.0.20.0218 on Windows is affected by a stack-based buffer overflow vulnerability.

Vulnerability Description

The flaw stems from the digest generation function's lack of parameter length verification, creating a stack overflow vulnerability that can be exploited remotely.

Affected Systems and Versions

Product: NHIServiSignAdapter
Vendor: CHANGING Inc.
Platform: Windows
Version: 1.0.20.0218

Exploitation Mechanism

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

Mitigation and Prevention

Immediate action is crucial to mitigate the risks posed by CVE-2020-25844.

Immediate Steps to Take

Update NHIServiSignAdapter to version 1.0.20.1109 to address the vulnerability.

Long-Term Security Practices

Regularly monitor for security updates and patches from the vendor.
Implement network security measures to prevent unauthorized access.
Conduct regular security assessments and audits to identify and address vulnerabilities effectively.

Patching and Updates

Apply security patches promptly to ensure the protection of systems and data.