vulnerability
Gentoo Linux: CVE-2021-3448: Dnsmasq: DNS cache poisoning
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:N/AC:M/Au:N/C:N/I:P/A:N) | 2021-04-08 | 2021-05-28 | 2021-05-28 |
Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
2021-04-08
Added
2021-05-28
Modified
2021-05-28
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.
Solution
gentoo-linux-upgrade-net-dns-dnsmasq
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