CVE-2021-27613
📋 TL;DR
This vulnerability in SAP Business One Chef cookbook allows attackers to access sensitive payroll data through insecure temporary folder permissions. It affects organizations using SAP Business One versions 9.2, 9.3, and 10.0 installed via the vulnerable Chef cookbook, potentially exposing confidential employee information.
💻 Affected Systems
- SAP Business One Chef cookbook
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of payroll data including employee personal information, salary details, and financial records, potentially enabling identity theft, financial fraud, and regulatory compliance violations.
Likely Case
Unauthorized access to payroll files containing sensitive employee information, leading to data privacy breaches and potential insider threats.
If Mitigated
Limited impact with proper file system permissions and access controls preventing unauthorized folder access.
🎯 Exploit Status
Exploitation requires local file system access to the temporary folders used for payroll data processing.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply SAP Note 3049755
Vendor Advisory: https://launchpad.support.sap.com/#/notes/3049755
Restart Required: Yes
Instructions:
1. Download and apply SAP Note 3049755 from SAP Support Portal. 2. Update the Chef cookbook to secure the temporary folder permissions. 3. Restart affected SAP Business One services. 4. Verify folder permissions are properly configured.
🔧 Temporary Workarounds
Secure Temporary Folder Permissions
linuxManually adjust file system permissions on the temporary folders used for payroll data to restrict access to authorized users only.
chmod 700 /path/to/payroll/temp/folder
chown sapuser:sapgroup /path/to/payroll/temp/folder
Windows Folder Security
windowsConfigure NTFS permissions to restrict access to payroll temporary folders to only necessary service accounts.
icacls "C:\Path\To\Payroll\Temp" /inheritance:r /grant "SAPServiceAccount":(OI)(CI)F /deny "Everyone":(OI)(CI)F
🧯 If You Can't Patch
- Implement strict access controls and monitoring on the temporary payroll folders
- Isolate SAP Business One servers from general network access and implement network segmentation
🔍 How to Verify
Check if Vulnerable:
Check if SAP Business One was installed using Chef cookbook versions 9.2, 9.3, or 10.0 and verify permissions on payroll temporary folders are overly permissive.Check Version:
Check SAP Business One version via SAP GUI or review installation logs for Chef cookbook versionVerify Fix Applied:
Verify SAP Note 3049755 is applied and temporary folder permissions are properly restricted to authorized users only.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to payroll temporary folders
- File permission changes on payroll directories
- Unusual file access patterns from non-service accounts
Network Indicators:
- Unusual file transfers from SAP Business One servers
- Lateral movement attempts to SAP servers
SIEM Query:
source="windows-security" EventID=4663 ObjectType="File" ObjectName="*payroll*temp*"