CVE-2021-3448

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-3448
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-3448.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-3448
Downstream
Related
Published
2021-04-08T23:15:12Z
Modified
2025-08-09T19:01:28Z
Severity
  • 4.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages