CVE Database›CVE-2024-33655

CVE-2024-33655

unbound: DNSBomb vulnerability

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Severity

Low

Red Hat Product Security

3.7

CVSS 3.1

Review impact separately from score.

Published · May 9, 2024

Updated · May 19, 2026

Description

A DNSBomb flaw was found in the unbound package. The DNSBomb attack works by sending low-rate spoofed queries for a malicious zone to Unbound. By controlling the delay of the malicious authoritative answers, Unbound slowly accumulates pending answers for the spoofed addresses. When the authoritative answers become available to Unbound at the same time, Unbound starts serving all the accumulated queries. This results in large-sized, concentrated response bursts to the spoofed addresses.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CWE-400 · Uncontrolled Resource Consumption