CVE-2022-30699

Name
CVE-2022-30699
Description
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
CONFIRM https://www.nlnetlabs.nl/downloads/unbound/CVE-2022-30698_CVE-2022-30699.txt

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:* unbound >= None < 1.16.2

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
unbound 3.16-main 1.15.0-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.15-main 1.13.2-r2 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.14-main 1.13.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
unbound 3.13-main 1.13.2-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable