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CVE-2019-6476— An error in QNAME minimization code can cause BIND to exit with an assertion failure

Quick assessment

Affected
ISC BIND 9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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 9.14.0版本至9.14.6版本和9.15.0版本至9.15.4版本中存在安全漏洞。攻击者可利用该漏洞造成named退出。

CVSS 5.9 · Medium EPSS 2.91% · P87

Possible ATT&CK Techniques 1 AI

T1440
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I. Basic Information for CVE-2019-6476

Vulnerability Information
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Vulnerability Title
An error in QNAME minimization code can cause BIND to exit with an assertion failure
Source: CVE Program / CVE List V5
Vulnerability Description
A defect in code added to support QNAME minimization can cause named to exit with an assertion failure if a forwarder returns a referral rather than resolving the query. This affects BIND versions 9.14.0 up to 9.14.6, and 9.15.0 up to 9.15.4.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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 9.14.0版本至9.14.6版本和9.15.0版本至9.15.4版本中存在安全漏洞。攻击者可利用该漏洞造成named退出。
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 9.14.0 up to 9.14.6 -

II. Public POCs for CVE-2019-6476

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III. Intelligence Information for CVE-2019-6476

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Vendor Advisories for CVE-2019-6476 (2)

Other References for CVE-2019-6476 (1)

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2019-6476

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