Vulnerability · Published Jun 9, 2023 · Assigned by Google
CVE-2023-32732Denial-of-Service in gRPC
Medium 5.3
In plain English
A medium-severity security flaw in gRPC from Google. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
gRPC contains a vulnerability whereby a client can cause a termination of connection between a HTTP2 proxy and a gRPC server: a base64 encoding error for `-bin` suffixed headers will result in a disconnection by the gRPC server, but is typically allowed by HTTP2 proxies. We recommend upgrading beyond the commit in https://github.com/grpc/grpc/pull/32309 https://www.google.com/url
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | grpc | no fix listed | DEBIAN-CVE-2023-32732 |
| Debian:13 | grpc | no fix listed | DEBIAN-CVE-2023-32732 |
| Debian:14 | grpc | no fix listed | DEBIAN-CVE-2023-32732 |
| Maven | io.grpc:grpc-protobuf | 1.53.1 | GHSA-9hxf-ppjv-w6rq |
| Maven | io.grpc:grpc-protobuf | 1.54.2 | GHSA-9hxf-ppjv-w6rq |
| PyPI | grpcio | 1.53.1 | GHSA-9hxf-ppjv-w6rq |
| PyPI | grpcio | 1.53.1, 1.54.2 | PYSEC-2026-1426 |
| PyPI | grpcio | 1.54.2 | GHSA-9hxf-ppjv-w6rq |
| RubyGems | grpc | 1.53.1 | GHSA-9hxf-ppjv-w6rq |
| RubyGems | grpc | 1.54.2 | GHSA-9hxf-ppjv-w6rq |
| Ubuntu:22.04:LTS | grpc | no fix listed | UBUNTU-CVE-2023-32732 |
| Ubuntu:24.04:LTS | grpc | no fix listed | UBUNTU-CVE-2023-32732 |
| Ubuntu:25.10 | grpc | no fix listed | UBUNTU-CVE-2023-32732 |
| Ubuntu:26.04:LTS | grpc | no fix listed | UBUNTU-CVE-2023-32732 |
| Ubuntu:26.10 | grpc | no fix listed | UBUNTU-CVE-2023-32732 |
Affected products (as reported)
Weakness: CWE-440 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L