VULNERABILITY INTELLIGENCE

CVE-2009-3602

CVSS score7.5 HIGH
EPSS probability2.98%
CISA KEVNot currently listed
Published2009-10-13
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:P/A:P

Description

Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.

Primary references