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DEBIAN-CVE-2023-40477

Vulnerability in libclamunrar (DEBIAN-CVE-2023-40477)

Summary

vulnerability in libclamunrar (DEBIAN-CVE-2023-40477). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `0.103.10-1~deb11u1` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **DEBIAN-CVE-2023-40477** has been found in libclamunrar. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade libclamunrar to **0.103.10-1~deb11u1** or later. If unsure, ask your IT team or search "libclamunrar DEBIAN-CVE-2023-40477" on the vendor's site.

DEBIAN-CVE-2023-40477 (libclamunrar) — Patched: `0.103.10-1~deb11u1` — 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** (unclassified) exists in libclamunrar.

📍 Affected scope

libclamunrar — .

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **0.103.10-1~deb11u1**.

🛡️ 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 'libclamunrar' .` 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 'libclamunrar' . | 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 `libclamunrar` 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 libclamunrar to 0.103.10-1~deb11u1
```
ステージング環境で 0.103.10-1~deb11u1 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

Debian:11 libclamunrar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.103.10-1~deb11u1"}]}]

Debian:12 libclamunrar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3-1~deb12u1"}]}]

Debian:13 libclamunrar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3-1"}]}]

Debian:14 libclamunrar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.3-1"}]}]

Debian:11 rar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:6.23-1~deb11u1"}]}]

Debian:12 rar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:6.23-1~deb12u1"}]}]

Debian:13 rar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:6.23-1"}]}]

Debian:14 rar

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:6.23-1"}]}]

Debian:11 unrar-nonfree

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.0.3-1+deb11u3"}]}]

Debian:12 unrar-nonfree

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2.6-1+deb12u1"}]}]

Debian:13 unrar-nonfree

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.2.10-1"}]}]

Debian:14 unrar-nonfree