CVE-2017-15105

moderate-risk
Published 2018-01-23

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.

Do I need to act?

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0.69% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Canonical Nlnetlabs

References (10)

Third Party Advisory http://www.securityfocus.com/bid/102817
Mailing List https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html
Patch https://unbound.net/downloads/CVE-2017-15105.txt
Third Party Advisory https://usn.ubuntu.com/3673-1/
Third Party Advisory http://www.securityfocus.com/bid/102817
Mailing List https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html
Patch https://unbound.net/downloads/CVE-2017-15105.txt
Third Party Advisory https://usn.ubuntu.com/3673-1/
37
/ 100
moderate-risk
Severity 21/34 · High
Exploitability 2/34 · Minimal
Exposure 14/34 · Moderate