Vulnerability Monitor

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CVE-2017-15105

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited integrity, for affected systems. Impacting 3 products from nlnetlabs, from debian, from canonical organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-01-23T16:29:00.273

Last Modified

2024-11-21T03:14:05.047

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-358
Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	nlnetlabs	unbound	< 1.6.8	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	debian	debian_linux	8.0	Yes
Operating System	canonical	ubuntu_linux	14.04	Yes
Operating System	canonical	ubuntu_linux	16.04	Yes
Operating System	canonical	ubuntu_linux	17.10	Yes
Operating System	canonical	ubuntu_linux	18.04	Yes

References

http://www.securityfocus.com/bid/102817 Third Party Advisory, VDB Entry ([email protected])
https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html Mailing List, Third Party Advisory ([email protected])
https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html Mailing List, Third Party Advisory ([email protected])
https://unbound.net/downloads/CVE-2017-15105.txt Patch, Vendor Advisory ([email protected])
https://usn.ubuntu.com/3673-1/ Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/102817 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://unbound.net/downloads/CVE-2017-15105.txt Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://usn.ubuntu.com/3673-1/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For nlnetlabs's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.