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  5. CVE-2023-47108

CVE-2023-47108: otelgrpc DoS vulnerability due to unbound cardinality metrics

November 12, 2023 (updated October 28, 2025)

The grpc Unary Server Interceptor opentelemetry-go-contrib/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go UnaryServerInterceptor returns a grpc.UnaryServerInterceptor suitable for use in a grpc.NewServer call that has unbound cardinality. It leads to the server’s potential memory exhaustion when many malicious requests are sent.

References

  • github.com/advisories/GHSA-8pgv-569h-w5rw
  • github.com/open-telemetry/opentelemetry-go-contrib
  • github.com/open-telemetry/opentelemetry-go-contrib/blob/9d4eb7e7706038b07d33f83f76afbe13f53d171d/instrumentation/google.golang.org/grpc/otelgrpc/interceptor.go
  • github.com/open-telemetry/opentelemetry-go-contrib/blob/instrumentation/google.golang.org/grpc/otelgrpc/v0.45.0/instrumentation/google.golang.org/grpc/otelgrpc/config.go
  • github.com/open-telemetry/opentelemetry-go-contrib/commit/04c5dcbb5b35f14b4e6793b245919c72addbc7d0
  • github.com/open-telemetry/opentelemetry-go-contrib/commit/b44dfc9092b157625a5815cb437583cee663333b
  • github.com/open-telemetry/opentelemetry-go-contrib/pull/4322
  • github.com/open-telemetry/opentelemetry-go-contrib/security/advisories/GHSA-8pgv-569h-w5rw
  • nvd.nist.gov/vuln/detail/CVE-2023-47108
  • pkg.go.dev/go.opentelemetry.io/otel/metric/noop

Code Behaviors & Features

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Affected versions

All versions starting from 0.37.0 before 0.46.0

Fixed versions

  • 0.46.0

Solution

Upgrade to version 0.46.0 or above.

Impact 7.5 HIGH

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

Learn more about CVSS

Weakness

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

Source file

go/go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc/CVE-2023-47108.yml

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