CVE-2019-6475
A flaw in mirror zone validity checking can allow zone data to be spoofed
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.
INFO
Published Date :
Oct. 17, 2019, 8:15 p.m.
Last Modified :
Nov. 21, 2024, 4:46 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Upgrade to ISC BIND version 9.14.7 or 9.15.5, or later.
- Update the affected packages.
Public PoC/Exploit Available at Github
CVE-2019-6475 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-6475.
| URL | 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&%3Butm_medium=RSS | |
| 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&%3Butm_medium=RSS |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-6475 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-6475
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
bind9.14 mirror
Makefile Shell C Roff HTML C++ XSLT Perl Python Batchfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-6475 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-6475 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://kb.isc.org/docs/cve-2019-6475 Added Reference https://security.netapp.com/advisory/ntap-20191024-0004/ Added Reference https://support.f5.com/csp/article/K42238532?utm_source=f5support&%3Butm_medium=RSS -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Internet Systems Consortium (ISC) https://support.f5.com/csp/article/K42238532?utm_source=f5support&%3Butm_medium=RSS [No types assigned] Removed Reference Internet Systems Consortium (ISC) https://support.f5.com/csp/article/K42238532?utm_source=f5support&utm_medium=RSS -
CWE Remap by [email protected]
Aug. 24, 2020
Action Type Old Value New Value Changed CWE CWE-20 CWE-345 -
CVE Modified by [email protected]
Nov. 19, 2019
Action Type Old Value New Value Added Reference https://support.f5.com/csp/article/K42238532?utm_source=f5support&utm_medium=RSS [No Types Assigned] -
Initial Analysis by [email protected]
Oct. 24, 2019
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Changed Reference Type https://kb.isc.org/docs/cve-2019-6475 No Types Assigned https://kb.isc.org/docs/cve-2019-6475 Vendor Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20191024-0004/ No Types Assigned https://security.netapp.com/advisory/ntap-20191024-0004/ Third Party Advisory Added CWE NIST CWE-20 Added CPE Configuration OR *cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* versions from (including) 9.14.0 up to (including) 9.14.6 *cpe:2.3:a:isc:bind:*:*:*:*:*:*:*:* versions from (including) 9.15.0 up to (including) 9.15.4 -
CVE Modified by [email protected]
Oct. 24, 2019
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20191024-0004/ [No Types Assigned]
Vulnerability Scoring Details
Base CVSS Score: 7.5
Base CVSS Score: 5
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.66 }} -0.62%
score
0.68802
percentile