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CVE-2021-3448

nvd nist
Published: Apr 8, 2021Modified: Dec 3, 2025

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4.0
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Exploitability: 2.2 / Impact: 1.4
Source: NVD

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.

Affected (6)

Show all products
Thekelleys: Dnsmasq · Redhat: Enterprise Linux · Fedoraproject: Fedora · Oracle: Communications Cloud Native Core Network Function Cloud Native Environment
Thekelleys
1 product
Dnsmasq
Redhat
1 product
Enterprise Linux
Fedoraproject
1 product
Fedora
Oracle
1 product
Communications Cloud Native Core Network Function Cloud Native Environment
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Dnsmasq
Before 2.85
Configuration B
1 vulnerable
Vulnerable SoftwareAffected Versions
Enterprise Linux
Version 8.0
Configuration C
3 vulnerable
Vulnerable SoftwareAffected Versions
Fedoraproject
Fedora
Version 32
Fedora
Version 33
Fedora
Version 34
Configuration D
1 vulnerable
Vulnerable SoftwareAffected Versions
Communications Cloud Native Core Network Function Cloud Native Environment
Version 1.9.0

Related CWEs

CWE-358
Improperly Implemented Security Check for Standard
The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

References (12)

Source: secalert@redhat.com
ExploitIssue TrackingPatchThird Party Advisory
Source: secalert@redhat.com
Source: secalert@redhat.com
Source: secalert@redhat.com
Source: secalert@redhat.com
Third Party Advisory
Source: secalert@redhat.com
PatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
ExploitIssue TrackingPatchThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchThird Party Advisory

Timeline

No history available yet.