CVE-2021-3448 Affecting dnsmasq-debuginfo package, versions <0:2.79-19.el8


Severity

Recommended
0.0
medium
0
10

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
2.28% (83rd percentile)

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  • Snyk IDSNYK-ROCKY8-DNSMASQDEBUGINFO-3284371
  • published3 Feb 2023
  • disclosed8 Apr 2021

Introduced: 8 Apr 2021

CVE-2021-3448  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 dnsmasq-debuginfo to version 0:2.79-19.el8 or higher.
This issue was patched in RLSA-2021:4153.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dnsmasq-debuginfo package and not the dnsmasq-debuginfo package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

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 Base Scores

version 3.1