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I. Basic Information for CVE-2021-25215
Vulnerability Information

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Vulnerability Title
An assertion check can fail while answering queries for DNAME records that require the DNAME to be processed to resolve itself
Source: NVD (National Vulnerability Database)
Vulnerability Description
In BIND 9.0.0 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a query for a record triggering the flaw described above, the named process will terminate due to a failed assertion check. The vulnerability affects all currently maintained BIND 9 branches (9.11, 9.11-S, 9.16, 9.16-S, 9.17) as well as all other versions of BIND 9.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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 存在安全漏洞,该漏洞源于回答DNAME的查询时,断言检查可能会失败 需要处理DNAME才能解决的记录。
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
VendorProductAffected VersionsCPESubscribe
ISCBIND9 Open Source Branches 9.0 through 9.11 9.0.0 through versions before 9.11.30 -
II. Public POCs for CVE-2021-25215
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III. Intelligence Information for CVE-2021-25215
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