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Advisories

Hickory-DNS 0.26.0 before 0.26.2 UDP Client Denial of Service via Spoofed Responses

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Severity
high
Date
Affecting

  • hickory-dns >= 0.26.0, < 0.26.2

CWE
  • CWE-696 Incorrect Behavior Order
CVSS
8.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
qifan-sailboat
Description
The hickory-net crate in Hickory DNS 0.26.0 before 0.26.2 stops listening and returns an error when a client UDP connection receives a datagram that cannot be parsed as a DNS message. Remote attackers who guess the query's source port, without knowing the transaction ID, can spoof malformed responses to abort client queries, causing denial of service.

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