[KEV] Code Injection in Microsoft office (CVE-2009-0238)
Summary
code injection in Microsoft office (CVE-2009-0238). Risk of unauthorized operations or information disclosure. Listed in CISA KEV — actively exploited.
Original description
The description as published by the source.
Microsoft Office Excel contains a remote code execution vulnerability that could allow an attacker to take complete control of an affected system if a user opens a specially crafted Excel file that includes a malformed object.
AI summary
Written by an external AI model and may contain mistakes. Check the original description and references below before acting on it.
There's a vulnerability in Microsoft Office Excel that allows remote code execution. If a user opens a specially crafted Excel file, an attacker could take full control of the system. This could lead to severe issues such as data breaches and system downtime. It's crucial for companies to inform employees not to open Excel files from untrusted sources.
A remote code execution vulnerability in Microsoft Office Excel (CWE-94) allows complete system takeover if a user opens a crafted Excel file. Exploitation requires user interaction (opening the file) and does not require authentication. The specific affected and patched versions are not provided. This vulnerability is listed on the CISA KEV list, indicating its severity.
Remote code execution vulnerability in Microsoft Office Excel.
When a specially crafted Excel file is opened by a user.
High (CWE-94)
No specific patch versions are mentioned yet.
Educate users not to open untrusted Excel files.
Monitor for unexpected opening of Excel files from untrusted sources.
Related past incidents Similar incidents extracted from past CVEs
Similar RCE vulnerability in Microsoft Office Excel allowing code execution via crafted files.
A vulnerability in Microsoft Office Excel allowing remote code execution via specific file content.
Excel vulnerability allowing attackers to execute arbitrary code via crafted document.
If this happens at your company Expected impact per business scenario
知らない相手からのExcelファイルを開けた際に、システムが攻撃を受け、業務が停止する可能性がある。
攻撃者によるシステム制御により、顧客データが流出し、信頼性が損なわれる可能性がある。
生産ラインの停止や業務情報の漏洩が発生する可能性がある。
信頼できない送信元からのExcelファイルを開かないよう従業員を教育し、プロアクティブなセキュリティ対策を講じる。
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'office' . | 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
office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。
-
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