CVE-2020-25928 : Security Advisory and Response

InterNiche NicheStack TCP/IP 4.0.1 DNS Feature Vulnerability

Understanding CVE-2020-25928

This CVE involves a vulnerability in the DNS feature of InterNiche NicheStack TCP/IP 4.0.1 that can lead to remote code execution.

What is CVE-2020-25928?

The vulnerability is due to a lack of proper validation in the DNS response processing functions, allowing for potential buffer overflow attacks.

The Impact of CVE-2020-25928

The vulnerability may result in information leakage, denial-of-service, or remote code execution, depending on the attacker's context.

Technical Details of CVE-2020-25928

The technical aspects of this CVE are as follows:

Vulnerability Description

The vulnerability is a buffer overflow issue in the DNS response processing functions.
Specific functions affected include dns_upcall(), getoffset(), and dnc_set_answer().

Affected Systems and Versions

Product: InterNiche NicheStack TCP/IP 4.0.1
Version: Not applicable

Exploitation Mechanism

Attack vector: Specific DNS response packet
Lack of validation on the "response data length" field allows for out-of-bounds read/write operations.

Mitigation and Prevention

Steps to address and prevent exploitation of CVE-2020-25928:

Immediate Steps to Take

Apply vendor patches or updates if available.
Implement network segmentation to limit exposure.
Monitor DNS traffic for anomalies.

Long-Term Security Practices

Regularly update and patch all software components.
Conduct security assessments and penetration testing.
Educate users on phishing and social engineering tactics.

Patching and Updates

Check for security advisories from the vendor.
Apply patches promptly to mitigate the vulnerability.