[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.
Original description
The description as published by the source.
PaperCut NG/MF contains an improper authentication vulnerability that could allow remote attackers to bypass authentication on affected installations via the SecurityRequestFilter class.
AI summary
Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.
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.
Improper authentication handling in PaperCut NG/MF allowing remote authentication bypass.
SecurityRequestFilter class.
High severity, potential for remote attackers to bypass authentication and gain unauthorized access.
Apply the vendor's patch as soon as it is released.
No workaround provided; patch application is necessary.
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
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。
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。
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。
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
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。 -
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
- advisory zerodayinitiative.com
- patch papercut.com
- web cisa.gov