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CVE-2019-6469— BIND Supported Preview Edition can exit with an assertion failure if ECS is in use

Quick assessment

Affected
ISC BIND 9 Supported Preview Edition
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 Supported Preview Edition版本中的EDNS Client Subnet功能存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。

AI Predicted 5.3 Difficulty: Moderate EPSS 1.96% · P80
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I. Basic Information for CVE-2019-6469

Vulnerability Information
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Vulnerability Title
BIND Supported Preview Edition can exit with an assertion failure if ECS is in use
Source: CVE Program / CVE List V5
Vulnerability Description
An error in the EDNS Client Subnet (ECS) feature for recursive resolvers can cause BIND to exit with an assertion failure when processing a response that has malformed RRSIGs. Versions affected: BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition.
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 输入验证错误漏洞
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 Supported Preview Edition版本中的EDNS Client Subnet功能存在安全漏洞。攻击者可利用该漏洞造成拒绝服务。
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 Supported Preview Edition BIND 9.10.5-S1 -> 9.11.6-S1 of BIND 9 Supported Preview Edition. -

II. Public POCs for CVE-2019-6469

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III. Intelligence Information for CVE-2019-6469

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Vendor Advisories for CVE-2019-6469 (1)

Other References for CVE-2019-6469 (1)

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

CVE-2019-6471 A race condition when discarding malformed packets can cause BIND to exit with an assertio
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-2019-6467 An error in the nxdomain redirect feature can cause BIND to exit with an INSIST assertion
CVE-2019-6468 BIND Supported Preview Edition can exit with an assertion failure if nxdomain-redirect is

IV. Related Vulnerabilities

Same product: BIND 9 Supported Preview Edition
Same vendor: ISC

V. Comments for CVE-2019-6469

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