CVE-2023-45142 (GCVE-0-2023-45142)

Vulnerability from cvelistv5 – Published: 2023-10-12 16:33 – Updated: 2025-02-13 17:13
VLAI
Title
OpenTelemetry-Go Contrib has DoS vulnerability in otelhttp due to unbound cardinality metrics
Summary
OpenTelemetry-Go Contrib is a collection of third-party packages for OpenTelemetry-Go. A handler wrapper out of the box adds labels `http.user_agent` and `http.method` that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent to it. HTTP header User-Agent or HTTP method for requests can be easily set by an attacker to be random and long. The library internally uses `httpconv.ServerRequest` that records every value for HTTP `method` and `User-Agent`. In order to be affected, a program has to use the `otelhttp.NewHandler` wrapper and not filter any unknown HTTP methods or User agents on the level of CDN, LB, previous middleware, etc. Version 0.44.0 fixed this issue when the values collected for attribute `http.request.method` were changed to be restricted to a set of well-known values and other high cardinality attributes were removed. As a workaround to stop being affected, `otelhttp.WithFilter()` can be used, but it requires manual careful configuration to not log certain requests entirely. For convenience and safe usage of this library, it should by default mark with the label `unknown` non-standard HTTP methods and User agents to show that such requests were made but do not increase cardinality. In case someone wants to stay with the current behavior, library API should allow to enable it.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version CPE status
open-telemetry opentelemetry-go-contrib Affected: < 0.44.0
guessed Create a notification for this product.
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Como workaround para dejar de verse afectado, se puede utilizar `otelhttp.WithFilter()`, pero requiere una configuraci\u00f3n manual cuidadosa para no registrar ciertas solicitudes por completo. Para mayor comodidad y uso seguro de esta librer\u00eda, deber\u00eda marcar de forma predeterminada con la etiqueta \\\"unknown\\\" los m\u00e9todos HTTP no est\u00e1ndar y los agentes de usuario para mostrar que dichas solicitudes se realizaron pero no aumentan la cardinalidad. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-21T20:19:22+00:00",
      "cve": "CVE-2023-45142",
      "id": "CVE-2023-45142",
      "initial_release_date": "2023-10-12T00:00:00+00:00",
      "product_status:fixed": "1109",
      "product_status:known_affected": "135",
      "product_status:known_not_affected": "8200",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "opentelemetry: DoS vulnerability in otelhttp",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-45142.json",
      "version": "3"
    }
  }
}



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