CVE-2025-70082

Executive Summary

CVE-2025-70082 is a critical vulnerability in the Lantronix EDS3000PS device, specifically within the ltrx_evo component. The vulnerability allows an unauthenticated attacker to execute arbitrary code and obtain sensitive information. The affected firmware version is 3.1.0.0R2. No public proof-of-concept (PoC) or patch is currently available. The vulnerability is classified as a code injection (CWE-94) and is remotely exploitable over the network.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (NVD base score not yet assigned; estimated critical based on description)
• Attack Vector: Network (AV:N)
• Attack Complexity: Low (AC:L)
• Privileges Required: None (PR:N)
• User Interaction: None (UI:N)
• Scope: Unchanged (S:U)
• Confidentiality Impact: High (C:H)
• Integrity Impact: High (I:H)
• Availability Impact: High (A:H)
• Threat Level: Critical – Remote code execution and information disclosure without authentication.

Deep Dive & Mechanics

The vulnerability resides in the ltrx_evo component of the Lantronix EDS3000PS firmware. This component likely handles device management, configuration, or communication protocols. The issue allows an attacker to inject and execute arbitrary code, possibly through improper input validation or insecure deserialization. The exact attack vector is not publicly documented, but the lack of authentication requirements suggests the vulnerable endpoint is exposed on the network.

Vulnerable vs. Patched Code

No patched version is available. The vulnerable code is in firmware version 3.1.0.0R2. Without a patch, the exact vulnerable code path cannot be compared.

Exploitation & Lab Setup

Red Team

Since no public exploit code is available, a red team would need to reverse-engineer the ltrx_evo component. Potential attack vectors include:

• Fuzzing the network service for buffer overflows or command injection.
• Analyzing firmware binaries for hardcoded credentials or insecure functions.
• Testing for common web vulnerabilities (if the component exposes a web interface).

Lab Setup:

• Target: Lantronix EDS3000PS with firmware 3.1.0.0R2.
• Attacker: Kali Linux with tools like Burp Suite, Ghidra, and custom fuzzers.
• Network: Isolated VLAN with the device on a separate subnet.

Blue Team

• Monitor network traffic for unusual requests to the device on common ports (e.g., 80, 443, 22, 23, 161).
• Implement strict network segmentation to isolate the device from untrusted networks.
• Deploy an IDS/IPS with custom rules to detect exploitation attempts.

Indicators of Compromise (IOCs)

• Network: Unusual outbound connections from the device to unknown IPs.
• Process: Unexpected processes spawned by the ltrx_evo service.
• File: Modified or new files in the device’s filesystem (e.g., /tmp, /var).
• Logs: Entries indicating command execution or authentication bypass in device logs.

Detection Engineering

YARA Rule

rule CVE_2025_70082_Lantronix_EDS3000PS {
    meta:
        description = "Detects exploitation attempts of CVE-2025-70082 in Lantronix EDS3000PS"
        author = "Valters IT"
        date = "2025-01-01"
        reference = "CVE-2025-70082"
    strings:
        $s1 = "ltrx_evo" ascii wide nocase
        $s2 = "EDS3000PS" ascii wide nocase
        $s3 = "3.1.0.0R2" ascii wide nocase
        $hex1 = { 2F 6C 74 72 78 5F 65 76 6F } // "/ltrx_evo"
    condition:
        any of ($s*) or $hex1
}

Sigma Rule

title: CVE-2025-70082 Lantronix EDS3000PS Exploitation Attempt
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects network traffic targeting the ltrx_evo component of Lantronix EDS3000PS
author: Valters IT
date: 2025/01/01
logsource:
    category: network
    product: suricata
detection:
    selection:
        dest_port:
            - 80
            - 443
            - 8080
        http.uri|contains: "/ltrx_evo"
    condition: selection
falsepositives:
    - Legitimate administrative access
level: high

Suricata Rule

alert tcp $EXTERNAL_NET any -> $HOME_NET $HTTP_PORTS (msg:"CVE-2025-70082 Lantronix EDS3000PS ltrx_evo Exploit Attempt"; flow:to_server,established; content:"/ltrx_evo"; http_uri; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

• Immediate: Disable or restrict access to the ltrx_evo component if possible. Use network access control lists (ACLs) to limit access to trusted IPs only.
• Short-term: Monitor vendor advisories for a patch. If no patch is forthcoming, consider replacing the device.
• Long-term: Implement a vulnerability management program for IoT/OT devices. Ensure firmware is updated regularly and devices are segmented from critical networks.

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