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 |
References
- bugzilla.redhat.com bugzilla.redhat.com
- FEDORA-2021-62a5062b2d lists.fedoraproject.org
- FEDORA-2021-9433bedebd lists.fedoraproject.org
- FEDORA-2021-5cd2571751 lists.fedoraproject.org
- GLSA-202105-20 security.gentoo.org
- www.oracle.com www.oracle.com
Timeline
- Published
- Last modified
Other CVEs of dnsmasq
The 10 CVEs of dnsmasq →
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CVE-2020-25686
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CVE-2020-25681
A flaw was found in dnsmasq before version 2.83
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