CVE-2017-15105 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

http://www.securityfocus.com/bid/102817 https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html https://unbound.net/downloads/CVE-2017-15105.txt https://usn.ubuntu.com/3673-1/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3