Vulnerability in modsecurity-apache (DEBIAN-CVE-2025-47947)

Summary

vulnerability in modsecurity-apache (DEBIAN-CVE-2025-47947). Risk of unauthorized operations or information disclosure. Exploitable via ``sanitiseMatchedBytes``. Mitigation: upgrade to `2.9.3-3+deb11u3` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **DEBIAN-CVE-2025-47947** has been found in modsecurity-apache. Attackers can target a specific entry point like ``sanitiseMatchedBytes`` over the network to misuse the product. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade modsecurity-apache to **2.9.3-3+deb11u3** or later. If unsure, ask your IT team or search "modsecurity-apache DEBIAN-CVE-2025-47947" on the vendor's site.

DEBIAN-CVE-2025-47947 (modsecurity-apache) — Attack surface: `sanitiseMatchedBytes` Patched: `2.9.3-3+deb11u3` — 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 modsecurity-apache. Attackers reach the vulnerable code path via ``sanitiseMatchedBytes`` without authentication.

📍 Affected scope

modsecurity-apache — . Attack surface: `sanitiseMatchedBytes`.

🔥 Severity

Severity: ?. Risk of unauthorized operations or information disclosure

🔧 How to fix

Update to **2.9.3-3+deb11u3**.

🛡️ 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 'modsecurity-apache' .` 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 'modsecurity-apache' . | 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 `modsecurity-apache` 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 modsecurity-apache to 2.9.3-3+deb11u3
```
ステージング環境で 2.9.3-3+deb11u3 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 modsecurity-apache

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.3-3+deb11u3"}]}]

Debian:12 modsecurity-apache

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.7-1+deb12u1"}]}]

Debian:13 modsecurity-apache

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.9-1"}]}]

Debian:14 modsecurity-apache