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CVE-2022-21698— Uncontrolled Resource Consumption in promhttp

Quick assessment

Affected
prometheus client_golang
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.

Prometheus是一款使用Go语言编写的、用于记录使用HTTP拉模型构建的时间序列数据库中实时指标的开源软件。 prometheus client golang存在资源管理错误漏洞，该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。

CVSS 7.5 · High EPSS 5.99% · P93
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I. Basic Information for CVE-2022-21698

Vulnerability Information
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Vulnerability Title
Uncontrolled Resource Consumption in promhttp
Source: CVE Program / CVE List V5
Vulnerability Description
client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods.
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
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
prometheus client golang 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Prometheus是一款使用Go语言编写的、用于记录使用HTTP拉模型构建的时间序列数据库中实时指标的开源软件。 prometheus client golang存在资源管理错误漏洞，该漏洞源于网络系统或产品对系统资源（如内存、磁盘空间、文件等）的管理不当。
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
prometheus client_golang < 1.11.1 -

II. Public POCs for CVE-2022-21698

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III. Intelligence Information for CVE-2022-21698

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Patches & Fixes for CVE-2022-21698 (1)

Vendor Advisories for CVE-2022-21698 (1)

Mailing List Discussions for CVE-2022-21698 (17)

Other References for CVE-2022-21698 (1)

IV. Related Vulnerabilities

Same vendor: prometheus
Same weakness: CWE-400

V. Comments for CVE-2022-21698

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