CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS
Percentile
81.7%
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.