CVE-2023-28952
📋 TL;DR
IBM Cognos Controller versions 10.4.1, 10.4.2, and 11.0.0 are vulnerable to injection attacks in application logging due to improper sanitization of user-provided data. This allows attackers to inject malicious content into log files, potentially leading to log poisoning or log injection attacks. Organizations using these specific versions of IBM Cognos Controller are affected.
💻 Affected Systems
- IBM Cognos Controller
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Log injection could lead to log file corruption, log evasion (hiding malicious activity), or execution of arbitrary code if logs are processed by vulnerable parsers, potentially compromising the application server.
Likely Case
Attackers inject malicious strings into log files, causing log corruption, obfuscating attack traces, or triggering parsing errors in downstream log analysis systems.
If Mitigated
With proper input validation and output encoding, log entries remain clean and trustworthy, maintaining audit trail integrity.
🎯 Exploit Status
Exploitation requires the ability to submit data that gets logged, typically through authenticated user interaction or API calls.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Apply fixes as per IBM Security Bulletin
Vendor Advisory: https://www.ibm.com/support/pages/node/7149876
Restart Required: Yes
Instructions:
1. Review IBM Security Bulletin for specific patch details.
2. Download and apply the recommended fix from IBM.
3. Restart IBM Cognos Controller services.
4. Verify the fix by testing log sanitization.
🔧 Temporary Workarounds
Implement Input Validation
allAdd server-side input validation to sanitize user-provided data before logging.
Custom application code changes required; no single command.
Log Sanitization Filter
allDeploy a log processing filter that sanitizes log entries before storage.
Implement log4j or similar logging framework filters to encode special characters.
🧯 If You Can't Patch
- Restrict access to IBM Cognos Controller to trusted users only.
- Monitor logs for unusual patterns or injection attempts and alert on anomalies.
🔍 How to Verify
Check if Vulnerable:
Check IBM Cognos Controller version against affected versions (10.4.1, 10.4.2, 11.0.0).Check Version:
Check version through IBM Cognos Controller admin interface or configuration files.Verify Fix Applied:
After patching, test by submitting data with special characters and verify logs show sanitized output.📡 Detection & Monitoring
Log Indicators:
- Unusual characters or patterns in log entries, such as injection strings or malformed data.
Network Indicators:
- Unusual spikes in log-related traffic or errors from log parsing systems.
SIEM Query:
Search for log entries containing special characters like <, >, ', ", ;, or newline/carriage return in user-provided fields.