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CVE-2020-8623— A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c

Quick assessment

Affected
ISC BIND9
Exploitation
High exploitation probability; assess promptly
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。 BIND 9.10.0至9.11.21, 9.12.0至9.16.5, 9.17.0至9.17.3，9.10.5-S1至9.11.21-S1存在安全漏洞，攻击者可以构造一个特殊的查询数据包触发异常。

CVSS 7.5 · High EPSS 6.40% · P93

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-8623

Vulnerability Information
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Vulnerability Title
A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11.c
Source: CVE Program / CVE List V5
Vulnerability Description
In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/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。 BIND 9.10.0至9.11.21, 9.12.0至9.16.5, 9.17.0至9.17.3，9.10.5-S1至9.11.21-S1存在安全漏洞，攻击者可以构造一个特殊的查询数据包触发异常。
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 BIND9 9.10.0 ~ unspecified -

II. Public POCs for CVE-2020-8623

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III. Intelligence Information for CVE-2020-8623

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Vendor Advisories for CVE-2020-8623 (4)

Mailing List Discussions for CVE-2020-8623 (5)

Other References for CVE-2020-8623 (2)

Same Patch Batch · ISC · 2020-08-21 · 5 CVEs total

CVE-2020-8620 7.5 HIGH Internet Systems Consortium BIND server 安全漏洞
CVE-2020-8621 7.5 HIGH Attempting QNAME minimization after forwarding can lead to an assertion failure in resolve
CVE-2020-8622 6.5 MEDIUM A truncated TSIG response can lead to an assertion failure
CVE-2020-8624 4.3 MEDIUM update-policy rules of type "subdomain" are enforced incorrectly

IV. Related Vulnerabilities

Same product: BIND9
Same vendor: ISC

V. Comments for CVE-2020-8623

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