CVE-2023-34723 – This vulnerability allows attackers to access s... (How to Fix)

Q: What is the severity of CVE-2023-34723?

CVE-2023-34723 has a CVSS score of 7.5 (HIGH). This vulnerability allows attackers to access sensitive system configuration files via path traversal in the TechView LA-5570 Wireless Gateway. Attackers can read the /config/system.conf file without authentication, potentially exposing credentials and configuration data. This affects users of TechView LA-5570 Wireless Gateway version 1.0.19_T53.

📋 TL;DR

This vulnerability allows attackers to access sensitive system configuration files via path traversal in the TechView LA-5570 Wireless Gateway. Attackers can read the /config/system.conf file without authentication, potentially exposing credentials and configuration data. This affects users of TechView LA-5570 Wireless Gateway version 1.0.19_T53.

💻 Affected Systems

Products:

TechView LA-5570 Wireless Gateway

Versions: 1.0.19_T53

Operating Systems: Embedded Linux

Default Config Vulnerable: ⚠️ Yes

Notes: This appears to be the default configuration. No special configuration required for exploitation.

📦 What is this software?

La5570 Firmware by Jaycar

View all CVEs affecting La5570 Firmware →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Attackers gain administrative credentials, take full control of the gateway, pivot to internal networks, and compromise connected IoT/home automation devices.

🟠

Likely Case

Attackers extract sensitive configuration data including passwords, API keys, and network settings, enabling further attacks on the gateway or connected systems.

🟢

If Mitigated

Limited information disclosure with no direct system compromise if proper network segmentation and access controls are implemented.

🌐 Internet-Facing: HIGH - The gateway is typically deployed as an internet-facing device for remote management of home automation systems.

🏢 Internal Only: MEDIUM - If not internet-facing, risk is reduced but still present from internal attackers or compromised devices.

🎯 Exploit Status

Public PoC: ⚠️ Yes

Weaponized: LIKELY

Unauthenticated Exploit: ⚠️ Yes

Complexity: LOW

Simple HTTP request to access /config/system.conf. Multiple public references and exploit details available.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown

Vendor Advisory: None found

Restart Required: No

Instructions:

No official patch available. Check vendor website for firmware updates. Consider replacing device if no security updates provided.

🔧 Temporary Workarounds

Network Segmentation

all

Isolate the gateway from internet access and restrict to internal network only

Access Control Lists

linux

Implement firewall rules to restrict access to gateway management interface

iptables -A INPUT -p tcp --dport 80 -s trusted_network -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP

🧯 If You Can't Patch

Remove device from internet-facing positions and place behind VPN/firewall
Monitor for unusual access patterns to /config/system.conf endpoint

🔍 How to Verify

Check if Vulnerable:

Attempt to access http://[gateway-ip]/config/system.conf. If file contents are returned, device is vulnerable.

Check Version:

Check web interface or device label for firmware version. Should show 1.0.19_T53 or similar.

Verify Fix Applied:

Attempt same access after applying workarounds - should receive 403/404 error or be blocked by firewall.

📡 Detection & Monitoring

Log Indicators:

HTTP GET requests to /config/system.conf
Unauthenticated access to configuration endpoints

Network Indicators:

Unusual external IPs accessing gateway management interface
Traffic patterns matching known exploit payloads

SIEM Query:

source="gateway_logs" AND (uri="/config/system.conf" OR status=200 AND uri CONTAINS "config")

📊 Metadata

CVE ID: CVE-2023-34723

CVSS v3 Score: 7.5 (HIGH)

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

CWE: CWE-59

Published: August 25, 2023

Last Updated: November 21, 2024

🔗 References

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