FICHE CVE

CVE-2021-3448

Publiée le 2021-04-08 · Dernière modification le 2026-06-17

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.

CVSS 3.14.0 MOYENNE

Type de faiblesse

CWE-358