CVEs-PoC/2021/CVE-2021-3448.md

CVE-2021-3448

Description

A flaw was found in dnsmasq in versions before 2.85. When configured to use a specific server for a given network interface, dnsmasq uses a fixed port while forwarding queries. An attacker on the network, able to find the outgoing port used by dnsmasq, only needs to guess the random transmission ID to forge a reply and get it accepted by dnsmasq. This flaw makes a DNS Cache Poisoning attack much easier. The highest threat from this vulnerability is to data integrity.

POC

Reference

• https://www.oracle.com/security-alerts/cpujan2022.html

Github

• https://github.com/criminalip/CIP-NSE-Script