Vulnerability in russh (CVE-2023-48795)

Summary

vulnerability in russh (CVE-2023-48795). Data can be tampered with by attackers. Mitigation: upgrade to `0.40.2` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2023-48795** has been found in russh. Data can be tampered with by attackers. CVSS score: 5.9/10. What to do: upgrade russh to **0.40.2** or later. If unsure, ask your IT team or search "russh CVE-2023-48795" on the vendor's site.

CVE-2023-48795 (russh) — CWE-345 / CVSS v3 5.9 Attack vector: remote (network-reachable) / unauthenticated / no user interaction Patched: `0.40.2` — 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-345) exists in russh.

📍 Affected scope

russh — .

🔥 Severity

Severity: Medium (CVSS 5.9/10). Data can be tampered with by attackers

🔧 How to fix

Update to **0.40.2**.

🛡️ 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 'russh' .` 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

1
Identify exposure identify
```
grep -r 'russh' . | 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 `russh` を grep し、稼働しているサービス・バージョンを把握する。
6
Apply patch patch
```
Upgrade russh to 0.40.2
```
ステージング環境で 0.40.2 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。
7
Post-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

rust russh

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.40.2"}]}]

pip paramiko

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.4.0"}]}]

go golang.org/x/crypto

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.0-20231218163308-9d2ee975ef9f"}]}]

Vulnerability in russh (CVE-2023-48795)

Summary

AI summary snake-internal / snake-material-v2

Response Actions (7 steps)

Affected packages

References

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