CVE-2024-25019 Overview
IBM Cognos Controller versions 11.0.0 and 11.0.1 contain an unrestricted file upload vulnerability (CWE-434) in the Journal entry attachments functionality. The application fails to properly validate the type of files uploaded through this feature, allowing attackers to upload malicious executable files into the system. These malicious files can subsequently be distributed to victims for further attacks, potentially leading to complete system compromise.
Critical Impact
This vulnerability allows unauthenticated remote attackers to upload and distribute malicious executable files through the IBM Cognos Controller platform, potentially leading to remote code execution and full system compromise.
Affected Products
- IBM Cognos Controller 11.0.0
- IBM Cognos Controller 11.0.1
Discovery Timeline
- December 3, 2024 - CVE-2024-25019 published to NVD
- December 11, 2024 - Last updated in NVD database
Technical Details for CVE-2024-25019
Vulnerability Analysis
This vulnerability stems from improper validation of file uploads in the Journal entry attachments feature of IBM Cognos Controller. The application accepts file uploads without verifying the file type, content, or extension, creating a dangerous attack surface. An attacker exploiting this flaw can upload arbitrary files, including executable payloads such as .exe, .bat, .ps1, or other script files that could be executed on target systems.
The network-based attack vector with no authentication requirement makes this vulnerability particularly dangerous in enterprise environments where IBM Cognos Controller is deployed for financial consolidation and reporting purposes.
Root Cause
The root cause is insufficient input validation on file upload functionality (CWE-434: Unrestricted Upload of File with Dangerous Type). The Journal entry attachments feature does not implement proper server-side validation to restrict uploaded file types to safe formats. This allows attackers to bypass any client-side restrictions and upload files with dangerous extensions or MIME types directly to the server.
Attack Vector
The attack is conducted over the network without requiring authentication. An attacker can exploit this vulnerability by:
- Accessing the Journal entry attachments functionality in IBM Cognos Controller
- Uploading a malicious executable file (e.g., malware, ransomware, or a reverse shell)
- The uploaded file is stored on the server without proper validation
- The attacker can then distribute links to the malicious file or leverage it for further attacks against users of the system
The vulnerability requires no user interaction to exploit the upload mechanism itself, though distributing the malicious payload may involve social engineering tactics to convince victims to execute the uploaded files.
Detection Methods for CVE-2024-25019
Indicators of Compromise
- Unexpected executable files (.exe, .bat, .ps1, .sh, .cmd) appearing in Journal attachment storage directories
- Suspicious file uploads with mismatched extensions and MIME types
- Unusual network traffic patterns to and from the Cognos Controller server
- Presence of web shells or reverse shell scripts in attachment directories
Detection Strategies
- Monitor file upload events to Cognos Controller for executable file types and known malicious signatures
- Implement file integrity monitoring on directories used for Journal entry attachments
- Review web server access logs for unusual POST requests to attachment upload endpoints
- Deploy endpoint detection and response (EDR) solutions to identify malicious file execution attempts
Monitoring Recommendations
- Enable verbose logging for file upload operations in IBM Cognos Controller
- Configure alerts for uploads of executable file extensions or files with suspicious content
- Implement network traffic analysis to detect potential command and control communications from uploaded payloads
- Regularly audit stored attachments for potentially malicious content
How to Mitigate CVE-2024-25019
Immediate Actions Required
- Apply the security patch provided by IBM immediately for all affected Cognos Controller installations
- Review existing Journal entry attachments for potentially malicious files and remove any suspicious content
- Implement network segmentation to limit access to the Cognos Controller server
- Restrict file upload permissions to authenticated and authorized users only while awaiting the patch
Patch Information
IBM has released a security update to address this vulnerability. Administrators should apply the patch documented in the IBM Support Page. The fix implements proper file type validation for Journal entry attachments to prevent the upload of dangerous file types.
Workarounds
- Configure web application firewalls (WAF) to block uploads of executable file types to the Cognos Controller application
- Implement server-side file type validation at the reverse proxy or load balancer level
- Restrict network access to the Journal entry attachments functionality to trusted IP ranges
- Disable or limit access to the Journal entry attachments feature until the patch can be applied
# Example WAF rule to block executable uploads (modify for your environment)
# Block common executable extensions in upload requests
SecRule REQUEST_FILENAME "@rx \.(exe|bat|cmd|ps1|sh|vbs|js|dll|msi)$" \
"id:1001,phase:2,deny,status:403,msg:'Blocked executable file upload'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
