Every CVE Search/ Get API key

CVE-2017-15105

A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An...

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
None

Exploit likelihood

3.16%Up 1.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 5.3

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.

Record
CVE-2017-15105
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness
CWE-358, CWE-20
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2017-15105
Weakness
CWE-358
Updated
2026-11-02
EUVDEUVD-2017-6570 No score

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.

Record
EUVD-2017-6570
Updated
2026-11-03
GitHub AdvisoriesGHSA-8hp4-8fgw-m69h 5.3

A flaw was found in the way unbound before 1.6.8 validated wildcard-synthesized NSEC records. An...

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.

Record
GHSA-8hp4-8fgw-m69h
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness
CWE-20
Updated
2026-11-02
OSV 5.3

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.

Record
CVE-2017-15105
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVDEBIAN-CVE-2017-15105 5.3

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.

Record
DEBIAN-CVE-2017-15105
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2017-15105 5.3

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.

Record
UBUNTU-CVE-2017-15105
CVSS 3.0
5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated
2026-11-02
OSVMGASA-2018-0091 No score

Updated unbound packages fix security vulnerability

Updated unbound packages to fix security vulnerability (CVE-2017-15105) in the processing of wildcard synthesized NSEC records. While synthesis of NSEC records is allowed by RFC4592, these synthesized owner names should not be used in the NSEC processing. This was, however, happenning in Unbound 1.6.7 and earlier versions.

Record
MGASA-2018-0091
Updated
2026-11-02
OSVopenSUSE-SU-2024:11005-1 No score

libunbound8-1.13.2-1.2 on GA media

These are all security issues fixed in the libunbound8-1.13.2-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11005-1
Updated
2026-11-02
OSVUSN-3673-1 No score

unbound vulnerability

Ralph Dolmans and Karst Koymans discovered that Unbound did not properly handle certain NSEC records. An attacker could use this to to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick Unbound into accepting a NODATA proof.

Record
USN-3673-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
unbound
Debian:12
 before 1.7.1-1
1.7.1-1
unbound
Debian:13
 before 1.7.1-1
1.7.1-1
unbound
Debian:14
 before 1.7.1-1
1.7.1-1
unbound
Debian:7
 before 1.4.17-3+deb7u3, plus listed versions
1.4.17-31.4.17-3+deb7u11.4.17-3+deb7u2
1.4.17-3+deb7u3
unbound
Debian:8
 before 1.4.22-3+deb8u4, plus listed versions
1.4.22-31.4.22-3+deb8u11.4.22-3+deb8u21.4.22-3+deb8u3
1.4.22-3+deb8u4
unbound
Mageia:6
 before 1.6.8-1.mga6
1.6.8-1.mga6
unbound
Ubuntu:14.04:LTS
 before 1.4.22-1ubuntu4.14.04.3, plus listed versions
1.4.20-11.4.21-11.4.21-1ubuntu11.4.21-1ubuntu21.4.22-1ubuntu1
Show 5 moreShow less
1.4.22-1ubuntu21.4.22-1ubuntu31.4.22-1ubuntu41.4.22-1ubuntu4.14.04.11.4.22-1ubuntu4.14.04.2
1.4.22-1ubuntu4.14.04.3
unbound
Ubuntu:16.04:LTS
 before 1.5.8-1ubuntu1.1, plus listed versions
1.4.22-1ubuntu61.5.7-1ubuntu11.5.7-1ubuntu21.5.8-1ubuntu1
1.5.8-1ubuntu1.1
unbound
Ubuntu:18.04:LTS
 before 1.6.7-1ubuntu2.1, plus listed versions
1.6.5-11.6.7-11.6.7-1build11.6.7-1ubuntu11.6.7-1ubuntu2
1.6.7-1ubuntu2.1
unbound
openSUSE:Tumbleweed
From an advisory covering 6 CVEs
 before 1.13.2-1.2
1.13.2-1.2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2017-15105 is a medium vulnerability (CVSS 5.3) in Nlnet Labs Unbound, published January 22, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.16%, the 88th percentile. Fixed in unbound 1.7.1-1.

References

Show 13 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open