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CVE-2019-6467— An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c

Quick assessment

Affected
ISC BIND 9
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 9.12.0版本至9.12.4版本和9.14.0版本（包括：9.13 development branch版本）中的nxdomain-redirect功能存在安全漏洞。攻击者可利用该漏洞造成BIND退出，导致拒绝服务。

AI Predicted 5.3 Difficulty: Trivial EPSS 5.46% · P93

Possible ATT&CK Techniques 1 AI

T1059.003 · Windows Command Shell
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I. Basic Information for CVE-2019-6467

Vulnerability Information
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Vulnerability Title
An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion failure in query.c
Source: CVE Program / CVE List V5
Vulnerability Description
A programming error in the nxdomain-redirect feature can cause an assertion failure in query.c if the alternate namespace used by nxdomain-redirect is a descendant of a zone that is served locally. The most likely scenario where this might occur is if the server, in addition to performing NXDOMAIN redirection for recursive clients, is also serving a local copy of the root zone or using mirroring to provide the root zone, although other configurations are also possible. Versions affected: BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 9.12.0版本至9.12.4版本和9.14.0版本（包括：9.13 development branch版本）中的nxdomain-redirect功能存在安全漏洞。攻击者可利用该漏洞造成BIND退出，导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ISC BIND 9 BIND 9.12.0-> 9.12.4, 9.14.0. Also affects all releases in the 9.13 development branch. -

II. Public POCs for CVE-2019-6467

# POC Description Source Link Shenlong Link
1 CVE-2019-6467 (BIND nxdomain-redirect) https://github.com/knqyf263/CVE-2019-6467 POC Details
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III. Intelligence Information for CVE-2019-6467

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Other References for CVE-2019-6467 (2)

Same Patch Batch · ISC · 2019-10-09 · 9 CVEs total

CVE-2018-5732 A specially constructed response from a malicious server can cause a buffer overflow in dh
CVE-2018-5743 Limiting simultaneous TCP clients was ineffective
CVE-2018-5744 A specially crafted packet can cause named to leak memory
CVE-2018-5745 An assertion failure can occur if a trust anchor rolls over to an unsupported key algorith
CVE-2019-6465 Zone transfer controls for writable DLZ zones were not effective
CVE-2019-6468 BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is
CVE-2019-6469 BIND Supported Preview Edition can exit with an assertion failure if ECS is in use
CVE-2019-6471 A race condition when discarding malformed packets can cause BIND to exit with an assertio

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2019-6467

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