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CVE-2023-32731
Vulnerability in grpcio (CVE-2023-32731)
Summary
vulnerability in grpcio (CVE-2023-32731). Confidential information can be exposed externally. Mitigation: upgrade to `1.54.2` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2023-32731** has been found in grpcio.
Confidential information can be exposed externally. CVSS score: ?/10.
What to do: upgrade grpcio to **1.54.2** or later.
If unsure, ask your IT team or search "grpcio CVE-2023-32731" on the vendor's site.
CVE-2023-32731 (grpcio) — CWE-440 /
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `1.54.2` — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
❓ What is the problem
**A vulnerability** (CWE-440) exists in grpcio.
📍 Affected scope
grpcio — .
🔥 Severity
Severity: ?. Confidential information can be exposed externally
🔧 How to fix
Update to **1.54.2**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'grpcio' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'grpcio' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で `grpcio` を grep し、稼働しているサービス・バージョンを把握する。
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6Apply patch patch
Upgrade grpcio to 1.54.2ステージング環境で 1.54.2 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスと、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番では Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
PyPI
grpcio
[{"type":"ECOSYSTEM","events":[{"introduced":"1.54.0"},{"fixed":"1.54.2"}]}]
Maven
io.grpc:grpc-protobuf
[{"type":"ECOSYSTEM","events":[{"introduced":"1.54.0"},{"fixed":"1.54.2"}]}]
RubyGems
grpc
[{"type":"ECOSYSTEM","events":[{"introduced":"1.54.0"},{"fixed":"1.54.2"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2023-32731
- advisory https://github.com/advisories/GHSA-cfgp-2977-2fmm
- package https://pypi.org/project/grpcio
- web https://github.com/grpc/grpc/issues/33463
- web https://github.com/grpc/grpc/pull/32309
- web https://github.com/grpc/grpc/pull/33005
- web https://github.com/grpc/grpc/commit/29d8beee0ac2555773b2a2dda5601c74a95d6c10
- web https://github.com/grpc/grpc/commit/65a2a895afaf1d2072447b9baf246374b182a946
- web https://github.com/grpc/grpc/releases/tag/v1.53.1
- web https://github.com/grpc/grpc/releases/tag/v1.54.2
- web https://github.com/rubysec/ruby-advisory-db/blob/master/gems/grpc/CVE-2023-32731.yml