CVE-2023-22291
📋 TL;DR
This CVE describes an invalid free vulnerability in Ichitaro 2022's Frame stream parser. Attackers can craft malicious documents that cause memory corruption by attempting to free a stack pointer. Users of Ichitaro 2022 who open untrusted documents are affected.
💻 Affected Systems
- Ichitaro 2022
📦 What is this software?
Ichitaro 2022 by Justsystems
⚠️ Risk & Real-World Impact
Worst Case
Arbitrary code execution with the privileges of the Ichitaro process, potentially leading to full system compromise.
Likely Case
Application crash (denial of service) or limited memory corruption that could be leveraged for further exploitation.
If Mitigated
Application crash with no further impact if proper sandboxing or exploit mitigations are in place.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious document. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to latest version (check vendor for specific patched version)
Vendor Advisory: https://www.justsystems.com/jp/support/security/2023/01.html
Restart Required: Yes
Instructions:
1. Open Ichitaro 2022. 2. Navigate to Help > Check for Updates. 3. Follow prompts to download and install the latest update. 4. Restart the application.
🔧 Temporary Workarounds
Disable Frame stream parsing
windowsIf possible, disable or restrict the Frame stream parser functionality through application settings.
Use application sandboxing
windowsRun Ichitaro in a sandboxed environment to limit potential damage from exploitation.
🧯 If You Can't Patch
- Restrict user permissions to prevent execution of arbitrary code
- Implement application whitelisting to block unauthorized executables
🔍 How to Verify
Check if Vulnerable:
Check Ichitaro version: Open Ichitaro > Help > About. If version is 1.0.1.57600, it is vulnerable.Check Version:
Not applicable - check through GUI as described aboveVerify Fix Applied:
After updating, verify version is no longer 1.0.1.57600 and check vendor advisory for patched version number.📡 Detection & Monitoring
Log Indicators:
- Application crash logs from Ichitaro.exe
- Unexpected memory access violations in system logs
Network Indicators:
- Unusual document downloads followed by application crashes
SIEM Query:
EventID=1000 OR EventID=1001 AND ProcessName="Ichitaro.exe"