VDB
ALPINE-CVE-2021-3448
ALPINE-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 3.1
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 |
|---|---|---|
| Alpine:v3.17 | dnsmasq | 0, 0, 0 |
| Alpine:v3.19 | dnsmasq | 0, 0, 0 |
| Alpine:v3.18 | dnsmasq | 0, 0, 0 |
| Alpine:v3.13 | dnsmasq | 2.61-r0, 2.60-r0, 2.59-r1 |
| Alpine:v3.16 | dnsmasq | 0, 0, 0 |
| Alpine:v3.15 | dnsmasq | 0, 0, 0 |
| Alpine:v3.22 | dnsmasq | 0, 0, 0 |
| Alpine:v3.21 | dnsmasq | 0, 0, 0 |
| Alpine:v3.14 | dnsmasq | 2.64-r0, 0, 2.46-r0 |
| Alpine:v3.10 | dnsmasq | 2.49-r0, 2.50-r0, 2.50-r1 |
| Alpine:v3.12 | dnsmasq | 2.66-r0, 2.70-r0, 2.69-r0 |
| Alpine:v3.11 | dnsmasq | 2.83-r0, 2.68-r0, 2.76-r2 |
| Alpine:v3.23 | dnsmasq | 0, 0, 0 |
| Alpine:v3.20 | dnsmasq | 0, 0, 0 |
Timeline
- Apr 8, 2021 CVE Published
- Dec 3, 2025 CVE Updated
- Apr 30, 2026 Distribution Patch