CVE-2021-3448

Name
CVE-2021-3448
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.
NVD Severity
low
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
Exploit https://bugzilla.redhat.com/show_bug.cgi?id=1939368
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GHURNEHHUBSW45KMIZ4FNBCSUPWPGV5V/
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FHG7GWSQWKF7JXIMLOGJBKZWBB4VIAJ7/
Third Party Advisory https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CVTJUOFFFHINLKWAOC2ZSC5MOPD4SJ24/
Third Party Advisory https://security.gentoo.org/glsa/202105-20
Patch https://www.oracle.com/security-alerts/cpujan2022.html

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:thekelleys:dnsmasq:*:*:*:*:*:*:*:* dnsmasq >= None < 2.85

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
dnsmasq 3.12-main 2.85-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
dnsmasq 3.11-main 2.85-r0 Natanael Copa <ncopa@alpinelinux.org> fixed
dnsmasq 3.10-main 2.85-r0 Natanael Copa <ncopa@alpinelinux.org> fixed