Test ID:	1.3.6.1.4.1.25623.1.0.117320
Category:	General
Title:	Pi-hole Ad-Blocker FTL < 5.8 DNS Cache Poisoning Vulnerability
Summary:	The Pi-hole Ad-Blocker FTL component is prone to a DNS cache; poisoning vulnerability.
Description:	Summary: The Pi-hole Ad-Blocker FTL component is prone to a DNS cache poisoning vulnerability. Vulnerability Insight: The Pi-hole Ad-Blocker FTL component is using 'dnsmasq' which is affected by the following flaw: 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. Affected Software/OS: Pi-hole Ad-Blocker FTL version prior to 5.8. Solution: Update to version 5.8 or later. CVSS Score: 4.3 CVSS Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2021-3448 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CVTJUOFFFHINLKWAOC2ZSC5MOPD4SJ24/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GHURNEHHUBSW45KMIZ4FNBCSUPWPGV5V/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FHG7GWSQWKF7JXIMLOGJBKZWBB4VIAJ7/ https://security.gentoo.org/glsa/202105-20 https://bugzilla.redhat.com/show_bug.cgi?id=1939368
Copyright	Copyright (C) 2021 Greenbone Networks GmbH

This is only one of 99761 vulnerability tests in our test suite. Find out more about running a complete security audit. To run a free test of this vulnerability against your system, register below.