CVE-2022-30549 – This CVE describes an out-of-bounds read vulner... (How to Fix)

Q: What is the severity of CVE-2022-30549?

CVE-2022-30549 has a CVSS score of 7.8 (HIGH). This CVE describes an out-of-bounds read vulnerability in Fuji Electric's V-Server and V-Server Lite software that could allow attackers to read sensitive memory data or potentially execute arbitrary code. Attackers can exploit this by tricking users into opening malicious image files. Affected users include anyone running vulnerable versions of these industrial monitoring software products.

📋 TL;DR

This CVE describes an out-of-bounds read vulnerability in Fuji Electric's V-Server and V-Server Lite software that could allow attackers to read sensitive memory data or potentially execute arbitrary code. Attackers can exploit this by tricking users into opening malicious image files. Affected users include anyone running vulnerable versions of these industrial monitoring software products.

💻 Affected Systems

Products:

V-Server
V-Server Lite

Versions: V-Server v4.0.11.0 and earlier, V-Server Lite v4.0.13.0 and earlier

Operating Systems: Windows (based on typical V-Server deployment)

Default Config Vulnerable: ⚠️ Yes

Notes: Vulnerability triggers when processing specially crafted image files through the affected software.

📦 What is this software?

V Server by Fujielectric

View all CVEs affecting V Server →

V Server by Fujielectric

View all CVEs affecting V Server →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Remote code execution leading to complete system compromise, data theft, and potential lateral movement within industrial control networks.

🟠

Likely Case

Information disclosure through memory reads, potentially exposing sensitive data or system information that could aid further attacks.

🟢

If Mitigated

Limited impact with proper network segmentation and user awareness preventing malicious file execution.

🌐 Internet-Facing: MEDIUM - While exploitation requires user interaction, internet-facing systems increase attack surface and potential for phishing/social engineering.

🏢 Internal Only: MEDIUM - Internal users could still be targeted via internal phishing or compromised internal systems.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires user interaction to open malicious file. No public exploit code identified in references.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: V-Server v4.0.12.0 or later, V-Server Lite v4.0.14.0 or later

Vendor Advisory: https://monitouch.fujielectric.com/site/download-e/09vsft6_inf/Search.php

Restart Required: Yes

Instructions:

1. Download updated version from Fuji Electric's download site. 2. Backup configuration and data. 3. Install the update following vendor instructions. 4. Restart the system and verify functionality.

🔧 Temporary Workarounds

Restrict image file processing

all

Configure software to not process untrusted image files or restrict file types

User awareness training

all

Train users to not open image files from untrusted sources

🧯 If You Can't Patch

Implement strict network segmentation to isolate V-Server systems from untrusted networks
Deploy application whitelisting to prevent execution of unauthorized files

🔍 How to Verify

Check if Vulnerable:

Check Help > About in V-Server software to see if version is v4.0.11.0 or earlier (v4.0.13.0 or earlier for Lite)

Check Version:

Check via GUI: Help > About menu option in V-Server application

Verify Fix Applied:

Verify version is v4.0.12.0 or later for V-Server (v4.0.14.0 or later for Lite) in Help > About

📡 Detection & Monitoring

Log Indicators:

Unexpected application crashes
Failed image file processing attempts
Unusual file access patterns

Network Indicators:

Unexpected outbound connections from V-Server systems
File transfers to V-Server systems

SIEM Query:

source="V-Server" AND (event_type="crash" OR file_extension IN ("jpg", "png", "bmp", "gif"))

📊 Metadata

CVE ID: CVE-2022-30549

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE: CWE-125

Published: June 16, 2022

Last Updated: November 21, 2024

🔗 References

https://jvn.jp/en/vu/JVNVU93134398/index.html Third Party Advisory
https://monitouch.fujielectric.com/site/download-e/09vsft6_inf/Search.php Release Notes,Vendor Advisory
https://monitouch.fujielectric.com/site/download-eu/03tellus_inf/index.php Release Notes,Vendor Advisory
https://jvn.jp/en/vu/JVNVU93134398/index.html Third Party Advisory
https://monitouch.fujielectric.com/site/download-e/09vsft6_inf/Search.php Release Notes,Vendor Advisory
https://monitouch.fujielectric.com/site/download-eu/03tellus_inf/index.php Release Notes,Vendor Advisory

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🔗 Related Vulnerabilities

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