CVE-2017-15105

MEDIUMEPSS 84th pctl

5.3

CVSS v3

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.

CWE-358 CWE-20Improper Input Validation

How to fix

Remediation Available

unboundDebian

Fixed in:1.7.1-1CVE-2017-15105

libunbound2Ubuntu

Fixed in:1.4.22-1ubuntu4.14.04.3USN-3673-1

Fixed in:1.5.8-1ubuntu1.1USN-3673-1

Fixed in:1.6.7-1ubuntu2.1USN-3673-1

unboundUbuntu

Fixed in:1.4.22-1ubuntu4.14.04.3USN-3673-1

Fixed in:1.5.8-1ubuntu1.1USN-3673-1

Fixed in:1.6.7-1ubuntu2.1USN-3673-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityLow

AvailabilityNone

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

Exploit Intelligence

2.63%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Patch1

unbound.net

Third-Party Advisory4

Related Vulnerabilities

Other CWE-358 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2018-1270	Critical	9.8	77%	-	Fix
CVE-2018-1275	Critical	9.8	58%	-	Fix
CVE-2024-7965	High	8.8	18%	KEV	Fix
CVE-2017-15663	High	7.5	13%	-	-
CVE-2016-10229	Critical	9.8	13%	-	Fix
CVE-2024-2174	High	8.8	13%	-	Fix

Common questions

How do I fix CVE-2017-15105?

Published advisories record a fix for 3 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2017-15105 being actively exploited?

Not that we know of. CVE-2017-15105 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.6% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

How severe is CVE-2017-15105?

CVE-2017-15105 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2017-15105 affect?

Published advisories record a fix for unbound (Debian), libunbound2 (Ubuntu), unbound (Ubuntu). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.