CVE-2017-15105 : A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized

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.

Published 2018-01-23 16:29:00

Updated 2019-10-09 23:24:13

Source Red Hat, Inc.

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2017-15105

Debian » Debian Linux » Version: 7.0
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
Matching versions
Debian » Debian Linux » Version: 8.0
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 14.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 16.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 18.04 LTS Edition
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
Matching versions
Canonical » Ubuntu Linux » Version: 17.10
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
Matching versions
Nlnetlabs » Unbound
Versions before (<) 1.6.8
cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2017-15105

Top countries where our scanners detected CVE-2017-15105

Top open port discovered on systems with this issue 53

IPs affected by CVE-2017-15105 14,735

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2017-15105!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2017-15105

EPSS FAQ

0.38%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 73 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2017-15105

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
5.3	MEDIUM	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N	3.9	1.4	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: Low Availability: None

CWE ids for CVE-2017-15105

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: nvd@nist.gov (Primary)
CWE-358 Improperly Implemented Security Check for Standard

The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

Assigned by: secalert@redhat.com (Secondary)

References for CVE-2017-15105

https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html

[SECURITY] [DLA 1264-1] unbound security update
Mailing List;Third Party Advisory
https://usn.ubuntu.com/3673-1/

USN-3673-1: Unbound vulnerability | Ubuntu security notices
Third Party Advisory
http://www.securityfocus.com/bid/102817

Unbound CVE-2017-15105 Security Bypass Vulnerability
Third Party Advisory;VDB Entry
https://unbound.net/downloads/CVE-2017-15105.txt

Patch;Vendor Advisory
https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html

[SECURITY] [DLA 1676-1] unbound security update
Mailing List;Third Party Advisory