Improper input validation in Nlnet Labs Unbound
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.026 (84.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Nlnet Labs Unbound — versions before 1.6.8
- Nlnetlabs Unbound
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Debian Linux — versions 7.0, 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.securityfocus.com/bid/102817 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.debian.org/debian-lts-announce/2019/02/msg00022.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/01/msg00039.html (mailing-list, Mailing List, Third Party Advisory)
- unbound.net/downloads/CVE-2017-15105.txt (Patch, Vendor Advisory)
- usn.ubuntu.com/3673-1/ (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-15105?
- CVE-2017-15105 is a medium-severity vulnerability in Nlnet Labs Unbound, classified under CWE-358. CVSS score: 5.3/10. Published 2018-01-23.
- How severe is CVE-2017-15105?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2017-15105 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.