CVE-2017-15105
unbound: Improper validation of wildcard synthesized NSEC records
Severity
ModerateRed Hat Product Security
CVSS 3.0
Review impact separately from score.
Published · January 19, 2018
Updated · November 22, 2025
Description
A flaw was found in the way unbound 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.
Statement
This issue affects the versions of unbound as shipped with Red Hat Enterprise Linux 7. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.0 · 5.4CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:L/A:L
CWE-358 · Improperly Implemented Security Check for Standard