Vulnerability CVE-2017-15105
Published: 2018-01-23

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.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
Nlnetlabs -> Unbound 
Debian -> Debian linux 
Canonical -> Ubuntu linux 

 References:
http://www.securityfocus.com/bid/102817
https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html
https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html
https://unbound.net/downloads/CVE-2017-15105.txt
https://usn.ubuntu.com/3673-1/
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