Description
A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.
References (5)
Scores
CVSS v3
5.3
EPSS
0.0069
EPSS Percentile
71.8%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-358
CWE-20
Status
published
Products (7)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
17.10
canonical/ubuntu_linux
18.04
debian/debian_linux
7.0
debian/debian_linux
8.0
nlnetlabs/unbound
< 1.6.8
Published
Jan 23, 2018
Tracked Since
Feb 18, 2026