CVE-2022-21698

 

Published at: - 15-02-2022 05:15

Last modified: - 04-07-2022 06:15

Total changes: - 12

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://github.com/prometheus/client_golang/pull/962
• https://github.com/prometheus/client_golang/releases/tag/v1.11.1
• https://github.com/prometheus/client_golang/security/advisories/GHSA-cg3q-j54f-5p7p
• https://github.com/prometheus/client_golang/pull/987
• FEDORA-2022-5f253807ce-Mailing List, Third Party Advisory
• FEDORA-2022-6c4cb64314-Mailing List, Third Party Advisory
• FEDORA-2022-6043a7b938-Mailing List, Third Party Advisory
• FEDORA-2022-eda0e65b01-Mailing List, Third Party Advisory
• FEDORA-2022-e244ad73d6-Mailing List, Third Party Advisory
• FEDORA-2022-a7d438b30b-Mailing List, Third Party Advisory
• FEDORA-2022-83405f9d5b-Mailing List, Third Party Advisory
• FEDORA-2022-9dd03cab55-Mailing List, Third Party Advisory
• FEDORA-2022-c87047f163-Mailing List, Third Party Advisory
• FEDORA-2022-2067702f06-Mailing List, Third Party Advisory
• FEDORA-2022-c5383675d9-Mailing List, Third Party Advisory
• FEDORA-2022-5e637f6cc6-Mailing List, Third Party Advisory
• FEDORA-2022-396c568c5e-
• FEDORA-2022-92ef43c439-
• FEDORA-2022-fae3ecee19-

 

Keywords

NVD

 

CVE-2022-21698

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures