National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-6475 Detail

Current Description

Mirror zones are a BIND feature allowing recursive servers to pre-cache zone data provided by other servers. A mirror zone is similar to a zone of type secondary, except that its data is subject to DNSSEC validation before being used in answers, as if it had been looked up via traditional recursion, and when mirror zone data cannot be validated, BIND falls back to using traditional recursion instead of the mirror zone. However, an error in the validity checks for the incoming zone data can allow an on-path attacker to replace zone data that was validated with a configured trust anchor with forged data of the attacker's choosing. The mirror zone feature is most often used to serve a local copy of the root zone. If an attacker was able to insert themselves into the network path between a recursive server using a mirror zone and a root name server, this vulnerability could then be used to cause the recursive server to accept a copy of falsified root zone data. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 7.5 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Nist CVSS score does not match with CNA score
CNA:  Internet Systems Consortium (ISC)
Base Score: 5.9 MEDIUM
Vector:  CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://kb.isc.org/docs/cve-2019-6475 Vendor Advisory
https://security.netapp.com/advisory/ntap-20191024-0004/ Third Party Advisory
https://support.f5.com/csp/article/K42238532?utm_source=f5support&utm_medium=RSS

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.14.0
Up to (including)
9.14.6
 cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
9.15.0
Up to (including)
9.15.4


Change History

3 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-6475
NVD Published Date:
10/17/2019
NVD Last Modified:
11/19/2019