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CVE-2023-27351
CISA KEV
high
[KEV] Authentication Bypass in Papercut ngmf (CVE-2023-27351)
Summary
authentication bypass in Papercut ngmf (CVE-2023-27351). Risk of unauthorized operations or information disclosure. Listed in CISA KEV — actively exploited.
AI summary openai / gpt-4o
A critical authentication vulnerability has been found in PaperCut NG/MF. This issue allows attackers to bypass the login process and access the system unauthorized. This vulnerability poses a risk of unauthorized external access and data loss, which could have severe impacts on an organization's information security. Applying the vendor's patch immediately is recommended to mitigate the impact.
The vulnerability in PaperCut NG/MF arises from improper authentication handling in the SecurityRequestFilter class. Attackers can bypass the authentication process without proper credentials, potentially gaining administrative access remotely. No workaround is suggested; applying the vendor's patch is the sole solution. Exact affected versions and patch details remain unspecified from the current materials.
❓ What is the problem
Improper authentication handling in PaperCut NG/MF allowing remote authentication bypass.
📍 Affected scope
SecurityRequestFilter class.
🔥 Severity
High severity, potential for remote attackers to bypass authentication and gain unauthorized access.
🔧 How to fix
Apply the vendor's patch as soon as it is released.
🛡️ Workaround
No workaround provided; patch application is necessary.
🔍 Detection
No specific detection method provided from current materials.
Related past incidents Similar incidents extracted from past CVEs
A similar authentication bypass vulnerability in PaperCut that allowed unauthorized admin access.
Another improper authentication issue where remote attackers could gain unintended access.
An authentication vulnerability in a different context allowing access bypass.
If this happens at your company Expected impact per business scenario
📌 ECサイトの場合
認証を回避した攻撃者により、顧客情報が流出する恐れがある。
📌 社内システムの場合
許可されていないユーザーによる機密データへのアクセスが発生し、情報漏洩のリスクが高まる。
📌 クラウドサービスプロバイダの場合
顧客のデータが不正アクセスされ、信頼性が損なわれる可能性がある。
Recommended action
直ちにベンダーの提供する修正パッチを適用することを推奨します。
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 'ngmf' . | 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 `ngmf` 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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4Consider incident declaration escalate
Notify SOC / on-callCISA KEV登録済 = 実環境で悪用が観測されている。Step 3 で兆候があればインシデント対応宣言、無くてもパッチ適用までWAF強化を最優先で。
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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。
References
- advisory NVD