GHSA-rcjv-mgp8-qvmr

Source

https://github.com/advisories/GHSA-rcjv-mgp8-qvmr

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/10/GHSA-rcjv-mgp8-qvmr/GHSA-rcjv-mgp8-qvmr.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-rcjv-mgp8-qvmr

Aliases

Related

Published

2023-10-16T14:01:54Z

Modified

2024-10-22T05:28:47.723813Z

Severity

7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator

Summary

OpenTelemetry-Go Contrib vulnerable to denial of service in otelhttp due to unbound cardinality metrics

Details

Summary

This handler wrapper https://github.com/open-telemetry/opentelemetry-go-contrib/blob/5f7e6ad5a49b45df45f61a1deb29d7f1158032df/instrumentation/net/http/otelhttp/handler.go#L63-L65 out of the box adds labels

http.user_agent
http.method

that have unbound cardinality. It leads to the server's potential memory exhaustion when many malicious requests are sent to it.

Details

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.

PoC

Send many requests with long randomly generated HTTP methods or/and User agents (e.g. a million) and observe how memory consumption increases during it.

Impact

In order to be affected, the program has to configure a metrics pipeline, use otelhttp.NewHandler wrapper, and does not filter any unknown HTTP methods or User agents on the level of CDN, LB, previous middleware, etc.

Others

It is similar to already reported vulnerabilities - https://github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-5r5m-65gx-7vrh (open-telemetry/opentelemetry-go-contrib) - https://github.com/advisories/GHSA-cg3q-j54f-5p7p (prometheus/client_golang)

Workaround for affected versions

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.

The other possibility is to disable HTTP metrics instrumentation by passing otelhttp.WithMeterProvider option with noop.NewMeterProvider.

Solution provided by upgrading

In PR https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4277, released with package version 0.44.0, 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.

References

https://github.com/open-telemetry/opentelemetry-go-contrib/pull/4277
https://github.com/open-telemetry/opentelemetry-go-contrib/releases/tag/v1.19.0

Database specific

{
    "nvd_published_at": "2023-10-12T17:15:09Z",
    "cwe_ids": [
        "CWE-770"
    ],
    "severity": "HIGH",
    "github_reviewed": true,
    "github_reviewed_at": "2023-10-16T14:01:54Z"
}

References

Affected packages

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/github.com/emicklei/go-restful/otelrestful

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/github.com/gin-gonic/gin/otelgin

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/github.com/gorilla/mux/otelmux

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo/otelecho; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/github.com/labstack/echo/otelecho

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1/otelmacaron; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/gopkg.in/macaron.v1/otelmacaron

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0

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

Package

Name: go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace; View open source insights on deps.dev
Purl: pkg:golang/go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.44.0