CVE-2023-45142

Aliases:GHSA-rcjv-mgp8-qvmrGO-2023-2113
Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 12 Oct 2023, 16:33
Last modified:13 Feb 2025, 17:13

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
1.16% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Oct 2023, 16:33
Published
Vulnerability first disclosed
13 Feb 2025, 17:13
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 1.16%• Percentile: 79%

Techniques & Countermeasures

  • CWE-770•Allocation of Resources Without Limits or Throttling

    The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Affected Systems

  • go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful•otelrestful

    < 0.44.0

  • go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin•otelgin

    < 0.44.0

  • go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux•otelmux

    < 0.44.0

  • go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo•otelecho

    < 0.44.0

  • go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1•otelmacaron

    < 0.44.0

  • go.opentelemetry.io/contrib/instrumentation/net/http•otelhttp

    < 0.44.0

  • go.opentelemetry.io/contrib/instrumentation/net/http/httptrace•otelhttptrace

    < 0.44.0

  • open-telemetry•opentelemetry-go-contrib

    < 0.44.0

  • opentelemetry•opentelemetry

    < 0.44.0

References (12)