vulnerability
CentOS Linux: CVE-2021-3448: Moderate: dnsmasq security and bug fix update (CESA-2021:4153)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:P/A:N) | Apr 8, 2021 | Nov 10, 2021 | May 25, 2023 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
Apr 8, 2021
Added
Nov 10, 2021
Modified
May 25, 2023
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.
Solutions
centos-upgrade-dnsmasqcentos-upgrade-dnsmasq-debuginfocentos-upgrade-dnsmasq-debugsourcecentos-upgrade-dnsmasq-utilscentos-upgrade-dnsmasq-utils-debuginfo
References
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