CVE Database›CVE-2017-15105

CVE-2017-15105

unbound: Improper validation of wildcard synthesized NSEC records

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Severity

Moderate

Red Hat Product Security

5.4

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 · 5.4
CVSS: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