[Dnsmasq-discuss] DHCP DOS caused by malformed dhcp discover packet

P, Sreelakshmi sreelakshmi.p at hpe.com
Mon Dec 10 09:40:05 GMT 2018


Hi All,

A malformed dhcp discover packet can cause dnsmasq to be unresponsive for a small amount of time.  If this was repeated over time an attacker could make the dhcp service unresponsive DOSing the box.

Does dnsmasq validate the incoming DHCP packet? We are using v2.78. Are there any fixes related to handling malformed DHCP packet?

Thanks!

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