CVE-2020-5555
📋 TL;DR
This vulnerability in Shihonkanri Plus GOOUT allows remote attackers to read and write files in the same directory as the software due to improper input validation. It affects users of versions 1.5.8 and 2.2.10, potentially leading to data exposure or manipulation.
💻 Affected Systems
- Shihonkanri Plus GOOUT
📦 What is this software?
Shihonkanri Plus Goout by Shihonkanri Plus Goout Project
Shihonkanri Plus Goout by Shihonkanri Plus Goout Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could read sensitive files (e.g., configuration, credentials) or write malicious files, leading to data breaches, system compromise, or ransomware deployment.
Likely Case
Unauthorized access to files in the application directory, resulting in data leakage or modification of application data.
If Mitigated
With proper network segmentation and access controls, impact is limited to the application's directory, reducing broader system risk.
🎯 Exploit Status
Exploitation details are unspecified in references, but the high CVSS score suggests it may be straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references; check vendor for updates beyond Ver1.5.8 and Ver2.2.10.
Vendor Advisory: https://jvn.jp/en/jp/JVN32415420/index.html
Restart Required: Yes
Instructions:
1. Check vendor website for patches or updated versions. 2. Apply the patch or upgrade to a fixed version. 3. Restart the application or server as required.
🔧 Temporary Workarounds
Restrict File Permissions
allLimit read/write permissions on the application directory to necessary users only.
chmod 750 /path/to/application (Linux)
icacls "C:\path\to\application" /deny Everyone:(R,W) (Windows)
Network Segmentation
allIsolate the application from untrusted networks using firewalls or VLANs.
🧯 If You Can't Patch
- Disable or remove the application if not essential to reduce attack surface.
- Implement strict access controls and monitor for unusual file access patterns.
🔍 How to Verify
Check if Vulnerable:
Check the application version; if it is Ver1.5.8 or Ver2.2.10, it is vulnerable.Check Version:
Check application documentation or configuration files for version info; no standard command provided.Verify Fix Applied:
Verify the version has been updated to a patched release and test file access controls.📡 Detection & Monitoring
Log Indicators:
- Unusual file read/write events in application logs
- Access attempts from unknown IP addresses
Network Indicators:
- Suspicious HTTP requests to application endpoints
- Unexpected file transfers
SIEM Query:
Example: 'source="application_logs" AND (event="file_access" OR event="input_validation_failure")'