CVE-2020-8621— Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c
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I. Basic Information for CVE-2020-8621
Vulnerability Information
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Vulnerability Title
Attempting QNAME minimization after forwarding can lead to an assertion failure in resolver.c
Source: NVD (National Vulnerability Database)
Vulnerability Description
In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.
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 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。 BIND 9.14.0至9.16.5, 9.17.0至9.17.3存在安全漏洞，攻击者可以构造一个特殊请求造成目标服务异常结束。
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
II. Public POCs for CVE-2020-8621
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- https://kb.isc.org/docs/cve-2020-8621x_refsource_CONFIRM
- https://security.netapp.com/advisory/ntap-20200827-0003/x_refsource_CONFIRM
- https://www.synology.com/security/advisory/Synology_SA_20_19x_refsource_CONFIRM
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlvendor-advisoryx_refsource_SUSE
- http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlvendor-advisoryx_refsource_SUSE
- https://nvd.nist.gov/vuln/detail/CVE-2020-8621
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-2020-8623 | 7.5 HIGH | A flaw in native PKCS#11 code can lead to a remotely triggerable assertion failure in pk11 |
| 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 |
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V. Comments for CVE-2020-8621
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