CVE-2021-39049
📋 TL;DR
CVE-2021-39049 is a stack-based buffer overflow vulnerability in IBM i2 Analyst's Notebook that allows a local attacker to execute arbitrary code with elevated privileges. This affects versions 9.2.0 through 9.2.2 of the software. Attackers could potentially gain lower-level system privileges by exploiting improper bounds checking.
💻 Affected Systems
- IBM i2 Analyst's Notebook
📦 What is this software?
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains SYSTEM/root privileges, installs persistent backdoors, exfiltrates sensitive data, or moves laterally within the network.
Likely Case
Local user escalates privileges to gain unauthorized access to sensitive analyst data or system resources within the i2 environment.
If Mitigated
Attack contained to user's session with minimal impact due to proper privilege separation and monitoring.
🎯 Exploit Status
Requires local access and knowledge of buffer overflow exploitation techniques. No public exploits have been reported.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.2.3 or later
Vendor Advisory: https://www.ibm.com/support/pages/node/6525256
Restart Required: Yes
Instructions:
1. Download IBM i2 Analyst's Notebook 9.2.3 or later from IBM Passport Advantage. 2. Run the installer as administrator. 3. Follow installation prompts. 4. Restart the system after installation completes.
🔧 Temporary Workarounds
Restrict Local Access
windowsLimit local access to i2 Analyst's Notebook systems to trusted users only.
Apply Principle of Least Privilege
windowsRun i2 Analyst's Notebook with minimal necessary user privileges.
🧯 If You Can't Patch
- Isolate affected systems from critical network segments
- Implement strict access controls and monitor for unusual privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check Help > About in i2 Analyst's Notebook to see if version is 9.2.0, 9.2.1, or 9.2.2.Check Version:
Not applicable - check via GUI Help > About menuVerify Fix Applied:
Verify version is 9.2.3 or later in Help > About dialog.📡 Detection & Monitoring
Log Indicators:
- Windows Event Logs showing unexpected privilege escalation
- Application crashes in i2 Analyst's Notebook
Network Indicators:
- Unusual outbound connections from i2 systems
SIEM Query:
source="Windows Security" EventID=4672 AND ProcessName="*i2*" AND SubjectUserName!=PreviousSubjectUserName