Rapid7 Vulnerability & Exploit Database

ISC BIND: A flaw in mirror zone validity checking can allow zone data to be spoofed (CVE-2019-6475)

Free InsightVM Trial No Credit Card Necessary
Watch Demo See how it all works
Back to Search

ISC BIND: A flaw in mirror zone validity checking can allow zone data to be spoofed (CVE-2019-6475)

Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
10/17/2019
Created
10/22/2019
Added
10/21/2019
Modified
03/28/2023

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.

Solution(s)

  • upgrade-isc-bind-latest

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;