VDB
DEBIAN-CVE-2021-3448
DEBIAN-CVE-2021-3448
PUBLISHED
CVSS 4 MEDIUM
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.
Risk Scores
CVSS v3.1
4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | dnsmasq | 0, 0, 0 |
| Debian:13 | dnsmasq | 0, 0, 0 |
| Debian:14 | dnsmasq | 0, 0, 0 |
| Debian:11 | dnsmasq | 0, 0, 0 |
Timeline
- Apr 8, 2021 CVE Published
- Apr 28, 2026 CVE Updated