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I. Basic Information for CVE-2021-37698
Vulnerability Information

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Vulnerability Title
Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer
Source: NVD (National Vulnerability Database)
Vulnerability Description
Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions 2.5.0 through 2.13.0, ElasticsearchWriter, GelfWriter, InfluxdbWriter and Influxdb2Writer do not verify the server's certificate despite a certificate authority being specified. Icinga 2 instances which connect to any of the mentioned time series databases (TSDBs) using TLS over a spoofable infrastructure should immediately upgrade to version 2.13.1, 2.12.6, or 2.11.11 to patch the issue. Such instances should also change the credentials (if any) used by the TSDB writer feature to authenticate against the TSDB. There are no workarounds aside from upgrading.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Icinga 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Icinga是德国Icinga公司的一套可扩展的服务器、网络资源监控系统。 Icinga 存在信任管理问题漏洞,该漏洞源于应用的实例通过可欺骗的基础设施使用TLS连接到任何提到的时间序列数据库。
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
Icingaicinga2 >= 2.5.0, <= 2.13.0 -
II. Public POCs for CVE-2021-37698
#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 10005 chars
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III. Intelligence Information for CVE-2021-37698
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IV. Related Vulnerabilities
V. Comments for CVE-2021-37698

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