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Centos Linux: CVE-2021-3448: Moderate: dnsmasq security and bug fix update (CESA-2021:4153)

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Centos Linux: CVE-2021-3448: Moderate: dnsmasq security and bug fix update (CESA-2021:4153)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
04/08/2021
Created
11/11/2021
Added
11/10/2021
Modified
11/10/2021

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.

Solution(s)

  • centos-upgrade-dnsmasq
  • centos-upgrade-dnsmasq-debuginfo
  • centos-upgrade-dnsmasq-debugsource
  • centos-upgrade-dnsmasq-utils
  • centos-upgrade-dnsmasq-utils-debuginfo

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