CVE-2020-25927 : Vulnerability Insights and Analysis

InterNiche NicheStack TCP/IP 4.0.1's DNS feature is vulnerable to an Out-of-bounds Read issue, leading to a denial of service. The vulnerability lies in the DNS response processing function, allowing a specific DNS response packet to trigger the exploit.

Understanding CVE-2020-25927

This CVE details a critical vulnerability in InterNiche NicheStack TCP/IP 4.0.1 that can result in a denial of service attack.

What is CVE-2020-25927?

The DNS feature in InterNiche NicheStack TCP/IP 4.0.1 is susceptible to an Out-of-bounds Read vulnerability. This flaw can be exploited remotely, causing a denial of service. The specific component affected is the DNS response processing function called dns_upcall(). The attack vector involves a particular DNS response packet that can exploit the vulnerability by not verifying the number of queries/responses in the DNS packet header.

The Impact of CVE-2020-25927

The impact of this vulnerability is a denial of service, which can be triggered remotely by sending a crafted DNS response packet. This can disrupt the normal operation of the affected system.

Technical Details of CVE-2020-25927

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability arises from an Out-of-bounds Read issue in the DNS response processing function dns_upcall() of InterNiche NicheStack TCP/IP 4.0.1.

Affected Systems and Versions

Product: InterNiche NicheStack TCP/IP 4.0.1
Vendor: N/A
Version: N/A

Exploitation Mechanism

The vulnerability can be exploited by sending a specific DNS response packet that does not align the number of queries/responses specified in the DNS packet header with the actual query/response data in the packet.

Mitigation and Prevention

Protecting systems from CVE-2020-25927 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches provided by the vendor promptly.
Implement network segmentation to limit the impact of potential attacks.
Monitor DNS traffic for any suspicious activities.

Long-Term Security Practices

Regularly update and patch all software and firmware components.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate users and IT staff on best practices for network security.

Patching and Updates

Ensure that the affected InterNiche NicheStack TCP/IP 4.0.1 version is updated with the latest patches to mitigate the vulnerability.