Vulnerability Details : CVE-2022-30699
NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.
Threat overview for CVE-2022-30699
Top countries where our scanners detected CVE-2022-30699
Top open port discovered on systems with this issue
53
IPs affected by CVE-2022-30699 11,724
Threat actors abusing to this issue?
Yes
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Exploit prediction scoring system (EPSS) score for CVE-2022-30699
0.12%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 45 %
Percentile, the proportion of vulnerabilities that are scored at or less