A flaw was found in dnsmasq in versions prior to 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.
| Vulnerable Product | Search on Vulmon | Subscribe to Product |
|---|---|---|
thekelleys dnsmasq |
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redhat enterprise linux 8.0 |
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fedoraproject fedora 32 |
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fedoraproject fedora 33 |
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fedoraproject fedora 34 |
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oracle communications cloud native core network function cloud native environment 1.9.0 |
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