4.0
Medium
CVE-2021-3448 A flaw was found in dnsmasq in versions before 2.85
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 products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| dnsmasq | Versions not published |
Other CVEs of dnsmasq
The 10 CVEs of dnsmasq →
CVE-2022-0934
A single-byte, non-arbitrary write/use-after-free flaw was found in dnsmasq
7.5
High
CVE-2020-14312
A flaw was found in the default configuration of dnsmasq, as shipped with Fedora versions prior to 31 and in all…
Not rated
CVE-2020-25686
A flaw was found in dnsmasq before version 2.83
Not rated
CVE-2020-25681
A flaw was found in dnsmasq before version 2.83
Not rated