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Vulnerability Details : CVE-2022-21698

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.
Publish Date : 2022-02-15 Last Update Date : 2022-12-09
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- CVSS Scores & Vulnerability Types

CVSS Score
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 400

- Related OVAL Definitions

Title Definition Id Class Family
RHSA-2022:1762: container-tools:rhel8 security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20221762 unix
RHSA-2022:7519: grafana security, bug fix, and enhancement update (Moderate) oval:com.redhat.rhsa:def:20227519 unix
RHSA-2022:7529: container-tools:3.0 security update (Moderate) oval:com.redhat.rhsa:def:20227529 unix
RHSA-2022:8057: grafana security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20228057 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2022-21698

# Product Type Vendor Product Version Update Edition Language
1 Application Fedoraproject Extra Packages For Enterprise Linux 7.0 * * * Version Details Vulnerabilities
2 Application Fedoraproject Extra Packages For Enterprise Linux 8.0 * * * Version Details Vulnerabilities
3 OS Fedoraproject Fedora 34 * * * Version Details Vulnerabilities
4 OS Fedoraproject Fedora 35 * * * Version Details Vulnerabilities
5 OS Fedoraproject Fedora 36 * * * Version Details Vulnerabilities
6 OS Fedoraproject Fedora 37 * * * Version Details Vulnerabilities
7 Application Prometheus Client Golang * * * * Version Details Vulnerabilities
8 Application Rdo Project RDO - * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Fedoraproject Extra Packages For Enterprise Linux 2
Fedoraproject Fedora 4
Prometheus Client Golang 1
Rdo Project RDO 1

- References For CVE-2022-21698[email protected]/message/FY3N7H6VSDZM37B4SKM2PFFCUWU7QYWN/
FEDORA FEDORA-2022-5f253807ce[email protected]/message/2IK53GWZ475OQ6ENABKMJMTOBZG6LXUR/
FEDORA FEDORA-2022-396c568c5e[email protected]/message/MH6ALXEQXIFQRQFNJ5Y2MJ5DFPIX76VN/
FEDORA FEDORA-2022-92ef43c439[email protected]/message/DLUJZV3HBP56ADXU6QH2V7RNYUPMVBXQ/
FEDORA FEDORA-2022-5e637f6cc6[email protected]/message/7V7I72LSQ3IET3QJR6QPAVGJZ4CBDLN5/
FEDORA FEDORA-2022-a7d438b30b[email protected]/message/4KDETHL5XCT6RZN2BBNOCEXRZ2W3SFU3/
FEDORA FEDORA-2022-2067702f06[email protected]/message/J5WPM42UR6XIBQNQPNQHM32X7S4LJTRX/
FEDORA FEDORA-2022-c87047f163[email protected]/message/ZY2SLWOQR4ZURQ7UBRZ7JIX6H6F5JHJR/
FEDORA FEDORA-2022-fae3ecee19[email protected]/message/HLAQRRGNSO5MYCPAXGPH2OCSHOGHSQMQ/
FEDORA FEDORA-2022-83405f9d5b CONFIRM[email protected]/message/KBMVIQFKQDSSTHVVJWJ4QH6TW3JVB7XZ/
FEDORA FEDORA-2022-e244ad73d6[email protected]/message/AK7CJBCGERCRXYUR2EWDSSDVAQMTAZGX/
FEDORA FEDORA-2022-eda0e65b01[email protected]
FEDORA FEDORA-2022-741325e9a0[email protected]/message/ZKORFJTRRDJCWBTJPISKKCVMMMJBIRLG/
FEDORA FEDORA-2022-6c4cb64314[email protected]/message/RN7JGC2LVHPEGSJYODFUV5FEKPBVG4D7/
FEDORA FEDORA-2022-739c7a0058[email protected]/message/SASRKYHT5ZFSVMJUQUG3UAEQRJYGJKAR/
FEDORA FEDORA-2022-6043a7b938[email protected]/message/2PFW6Q2LXXWTFRTMTRN4ZGADFRQPKJ3D/
FEDORA FEDORA-2022-9dd03cab55[email protected]/message/5OGNAFVXSMTTT2UPH6CS3IH6L3KM42Q7/
FEDORA FEDORA-2022-13ad572b5a[email protected]/message/36GUEPA5TPSC57DZTPYPBL6T7UPQ2FRH/
FEDORA FEDORA-2022-c5383675d9

- Metasploit Modules Related To CVE-2022-21698

There are not any metasploit modules related to this CVE entry (Please visit for more information)

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