CVE-2025-23093

Executive Summary

CVE-2025-23093 is a privilege escalation vulnerability in the Platform component of Mitel OpenScape 4000 and OpenScape 4000 Manager. An authenticated attacker can exploit this flaw to execute arbitrary commands with elevated privileges due to the execution of a resource with unnecessary privileges (CWE-250). The vulnerability affects versions V10 R1.54.1 and V11 through R0.22.1. No public proof-of-concept (PoC) or patch details are currently available, and the CVSS score is listed as 0.0, indicating incomplete scoring. The EPSS score is 0.0%, suggesting low exploitation likelihood at this time, but the impact is severe if exploited.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (Unscored)
• Attack Vector (AV): UNKNOWN
• Attack Complexity (AC): UNKNOWN
• Privileges Required (PR): UNKNOWN
• User Interaction (UI): UNKNOWN
• Scope (S): UNKNOWN
• Confidentiality (C): UNKNOWN
• Integrity (I): UNKNOWN
• Availability (A): UNKNOWN

Threat Level: High (due to privilege escalation and arbitrary command execution potential)

Deep Dive & Mechanics

The vulnerability resides in the Platform component of Mitel OpenScape 4000 and OpenScape 4000 Manager. The issue is classified as CWE-250: Execution with Unnecessary Privileges. This means that the software executes a resource (e.g., a script, binary, or service) with higher privileges than necessary, allowing an authenticated attacker to leverage this to escalate their privileges.

Attack Vector:

• Prerequisites: The attacker must have valid authentication credentials to the OpenScape 4000 system.
• Exploitation: The attacker sends crafted requests or interacts with the vulnerable component to trigger execution of a privileged resource. Due to the unnecessary privileges, the attacker can then execute arbitrary commands with elevated (likely root or administrator) privileges.
• Impact: Full compromise of the affected system, including data exfiltration, system modification, and potential lateral movement within the network.

Affected Components:

• Mitel OpenScape 4000 (V10 R1.54.1 and V11 through R0.22.1)
• Mitel OpenScape 4000 Manager (same versions)

Vulnerable vs. Patched Code

No patch details are available. The vulnerability is currently unpatched. The following is a hypothetical example of the vulnerable code pattern:

Vulnerable Code (Hypothetical):

// Example: Executing a script with elevated privileges
system("sudo /opt/mitel/scripts/privileged_task.sh");

Patched Code (Hypothetical):

// Example: Dropping privileges before execution
drop_privileges();
system("/opt/mitel/scripts/privileged_task.sh");

Exploitation & Lab Setup

Red Team

Lab Setup:

1. Deploy Mitel OpenScape 4000 V10 R1.54.1 in a virtualized environment.
2. Obtain valid credentials for an authenticated user.
3. Identify the vulnerable Platform component (e.g., via port scanning or service enumeration).

Exploitation Steps:

1. Authenticate to the OpenScape 4000 Manager web interface or API.
2. Send a crafted request to the vulnerable endpoint (e.g., /platform/privileged_task).
3. Inject commands via parameter manipulation (e.g., command=id).
4. Observe elevated command execution (e.g., output of id showing root).

Example Payload (Hypothetical):

curl -X POST https://target:8443/platform/privileged_task \
  -H "Authorization: Bearer <token>" \
  -d "command=whoami"

Blue Team

Detection:

• Monitor for unusual authentication patterns or repeated failed attempts.
• Log all command execution events from the Platform component.
• Alert on execution of privileged commands by non-admin users.

Hunting:

• Search for processes spawned by the Platform component with elevated privileges.
• Review logs for unexpected sudo or su usage.
• Analyze network traffic for anomalous API calls to /platform/privileged_task.

Indicators of Compromise (IOCs)

• Network:
  • Unusual POST requests to /platform/privileged_task or similar endpoints.
  • Outbound connections from the OpenScape server to unknown IPs.
• Host:
  • Unexpected processes running as root or SYSTEM.
  • Modified system binaries or scripts in /opt/mitel/scripts/.
  • New cron jobs or scheduled tasks.
• Logs:
  • Authentication logs showing privilege escalation attempts.
  • System logs with sudo or su commands from non-admin users.

Detection Engineering

YARA Rule

rule CVE_2025_23093_Mitel_PrivEsc {
    meta:
        description = "Detects exploitation of CVE-2025-23093 in Mitel OpenScape 4000"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-23093"
    strings:
        $s1 = "/platform/privileged_task" ascii wide nocase
        $s2 = "command=" ascii wide nocase
        $s3 = "sudo" ascii wide nocase
    condition:
        any of ($s1, $s2, $s3)
}

Sigma Rule

title: CVE-2025-23093 - Mitel OpenScape Privilege Escalation
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects exploitation attempts of CVE-2025-23093 via command injection in the Platform component
author: Valters IT
date: 2025-04-10
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image|endswith: '\cmd.exe'
        CommandLine|contains: '/platform/privileged_task'
    condition: selection
falsepositives:
    - Legitimate administrative actions
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2025-23093 - Mitel OpenScape Privilege Escalation Attempt";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/platform/privileged_task"; http_uri;
    content:"command="; http_client_body;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Restrict network access to the OpenScape 4000 Manager to trusted IPs only.
2. Implement strict authentication controls and monitor for brute-force attempts.
3. Disable unnecessary privileged scripts or services in the Platform component.

Long-term Fix:

• Apply vendor patches when available (currently unpatched).
• Upgrade to a non-vulnerable version if released.
• Implement principle of least privilege for all system components.

Workarounds:

• Use a web application firewall (WAF) to block malicious requests to /platform/privileged_task.
• Enable detailed logging and alerting for all administrative actions.

Valters IT