CVE-2020-25926 Explained : Impact and Mitigation
Learn about CVE-2020-25926 affecting InterNiche NicheStack TCP/IP 4.0.1 DNS client due to insufficient entropy in DNS transaction ID, leading to DNS cache poisoning. Find mitigation steps and prevention measures.
InterNiche NicheStack TCP/IP 4.0.1 DNS client is vulnerable to DNS cache poisoning due to insufficient entropy in the DNS transaction ID.
Understanding CVE-2020-25926
The vulnerability in the DNS client of InterNiche NicheStack TCP/IP 4.0.1 can lead to DNS cache poisoning through a specific DNS response packet.
What is CVE-2020-25926?
The DNS client in InterNiche NicheStack TCP/IP 4.0.1 is affected by insufficient entropy in the DNS transaction ID, allowing for DNS cache poisoning remotely. The specific component impacted is dns_query_type().
The Impact of CVE-2020-25926
The vulnerability can result in DNS cache poisoning, a serious threat that can lead to unauthorized DNS entries and potential redirection of network traffic.
Technical Details of CVE-2020-25926
The technical aspects of the vulnerability provide insight into its nature and potential risks.
Vulnerability Description
The vulnerability arises from insufficient entropy in the DNS transaction ID within the InterNiche NicheStack TCP/IP 4.0.1 DNS client.
Affected Systems and Versions
- Product: InterNiche NicheStack TCP/IP 4.0.1
- Vendor: N/A
- Version: N/A
Exploitation Mechanism
The attack vector involves a specific DNS response packet that exploits the lack of entropy in the DNS transaction ID.
Mitigation and Prevention
Addressing and preventing the CVE-2020-25926 vulnerability is crucial for maintaining network security.
Immediate Steps to Take
- Implement DNS security best practices to mitigate cache poisoning risks.
- Monitor DNS traffic for any suspicious activities or unauthorized DNS entries.
- Consider implementing DNSSEC to enhance DNS security.
Long-Term Security Practices
- Regularly update and patch the InterNiche NicheStack TCP/IP software to address known vulnerabilities.
- Conduct regular security assessments and penetration testing to identify and remediate potential weaknesses.
Patching and Updates
- Stay informed about security advisories and updates from InterNiche regarding the NicheStack TCP/IP software.