CVE-2022-4002

Executive Summary

CVE-2022-4002 is a command injection vulnerability in the Motorola Q14 Mesh Router that allows an authenticated user to execute operating system commands as root via a specially crafted API request. The vulnerability exists in the router's management API, which is exposed to authenticated users. Successful exploitation grants an attacker root-level command execution on the affected device, allowing full device compromise, network traffic interception, and potential lateral movement into the connected home or small business network. With a CVSS score of 7.2 (High), this vulnerability represents a significant risk to users of the Motorola Q14 Mesh Router, particularly those who expose the management interface to the internet or untrusted networks.

The vendor has claimed a patch in firmware version v1.5.0.16, but this patch is not independently confirmed — the confidence rating is 2/4 (CLAIMED). No public PoC or exploit code is available at the time of writing, and CISA KEV does not include this CVE, indicating no confirmed exploitation in the wild has been reported to CISA to date. The EPSS score of 0.00954 places this vulnerability in the high relative percentile (58.2%) for exploitation likelihood, suggesting that while exploitation probability is currently low, it is higher than average for CVEs.

Technical Analysis

CVE-2022-4002 affects the Motorola Q14 Mesh Router, a consumer-grade mesh Wi-Fi system. The NVD description indicates a command injection vulnerability reachable through a "specially crafted API request" — this points to the router's management application programming interface (API) being the attack surface. The attacker requires authentication to reach the vulnerable endpoint, meaning they must already possess valid credentials to the router's management interface.

The injection class is command injection (CWE-77 family). The mechanism is as follows: the router's API accepts user-supplied input that is concatenated into an operating system command — likely a shell command invoked by the firmware's backend services — without adequate sanitization, quoting, or input validation. A crafted request containing shell metacharacters (;, |, &&, $(), backticks, etc.) allows the attacker to break out of the intended command and append arbitrary OS-level commands that execute with root privileges.

The authentication requirement is a mitigating factor — an unauthenticated attacker cannot directly exploit this CVE. However, because the API is accessible to any authenticated user, any compromise of router credentials (weak default passwords, password reuse, credential stuffing) immediately escalates to full root command execution. Additionally, if an attacker already controls a device on the local network and the management interface is accessible from LAN (common default), the authentication threshold is low.

Insufficient technical detail is available in the NVD description to identify the specific API endpoint, parameter names, or affected function names. No function names, paths, or parameter identifiers were disclosed in the CNA title or NVD description. The vulnerability class is command injection, but the exact injection point (GET parameter, POST body field, JSON payload field) is unknown. The report authors therefore describe the attack at the vulnerability-class level only, consistent with the accuracy rules.

The authenticated nature of the vulnerability reduces the external attack surface but broadens the threat model to include any device or individual that has or can obtain credentials. For a consumer router, this includes all household devices, guests on the Wi-Fi network, and any internet-exposed management interface (which some users enable for remote administration).

Exploitation Scenarios

Prerequisites for exploitation:

1. Access to the Motorola Q14 Mesh Router management API (local network or internet-exposed management interface).
2. Valid authentication credentials (username/password) for the device.
3. Knowledge of the vulnerable API endpoint and the parameter that is susceptible to command injection.

Attack chain inference (based on vulnerability class; no public PoC available):

Step 1 — Reconnaissance and Target Identification: An attacker identifies a target Motorola Q14 Mesh Router. This can be done by scanning for the device's management web interface (common ports such as 80, 443, 8080, or 8443) using Shodan or other internet-wide scanning tools. The attacker may also be on the same local network and detect the router's management interface via arp-scan or similar network discovery tools. The attacker then identifies that the target is a Motorola Q14 device via banner grabbing, HTTP title, or device fingerprinting.

Step 2 — Authentication: The attacker authenticates to the management API, possibly by:

• Guessing weak or default credentials.
• Using stolen credentials (e.g., from credential stuffing attacks, since users often reuse passwords).
• Gaining credentials through separate social engineering or interception of unencrypted management traffic.

Step 3 — Triggering the Command Injection: The attacker crafts a malicious API request to an endpoint that processes user-supplied input and passes it to a system shell. The payload injects shell metacharacters to break out of the intended command and execute arbitrary OS commands. For example, an API request that sets a network parameter, updates a device name, or configures a service might concatenate the user input directly into a shell command. Generic patterns include appending ;id;, && whoami, | cat /etc/shadow, or invoking a reverse shell.

The NVD description does not specify which API endpoint or parameter is vulnerable. Typical consumer router injection points might include hostname fields, DHCP reservation fields, Wi-Fi SSID configuration, or diagnostic tools (like ping/traceroute functions). Attackers commonly target fields that are recycled into system commands without sanitization.

Step 4 — Post-Exploitation Impact: Upon successful injection, the attacker achieves root-level command execution on the router. This enables:

• Full Device Control: Modify firmware, disable security features (firewall, intrusion prevention), read configurations, and extract credentials or Wi-Fi keys.
• Network Traffic Interception: Implement packet capture, DNS hijacking, or SSL stripping to eavesdrop on all LAN traffic.
• Router as a Pivot Point: Use the compromised router as a launchpad for attacks against other LAN devices (file servers, smart home devices, computers), evading perimeter defenses.
• Persistent Backdoor: Install persistent malware, modify firmware, or create a reverse tunnel for continued access.
• Botnet Integration: In large-scale campaigns, compromised routers are often incorporated into botnets for DDoS attacks.

Since the command executes as root, the attacker has the highest possible privilege level on the device. A full chain could look like: attacker on LAN discovers router → authenticates with default/reused credentials → sends crafted API request with shell injection payload → gains root shell → exfiltrates sensitive data or pivots to other LAN devices.

Note: No public PoC exists for this CVE as of the writing date. This attack chain is inferred from the vulnerability class and the NVD description. Specific endpoint names, payload parameters, and injection syntax are not publicly documented.

Impact Assessment

CVE-2022-4002 presents a High-severity impact with a CVSS base score of 7.2. The CVSS vector string was not provided, but the score suggests a scenario combining high attack complexity with high impact on confidentiality, integrity, and availability.

Business Impact:

• For home users: compromise of the central network device exposes all connected devices to attack, including laptops, smartphones, smart TVs, IoT devices, and smart home hubs. Privacy of all network traffic is at risk.
• For small businesses using Motorola Q14 routers: the router is the network perimeter. Root access compromises the entire network — sensitive data, customer information, and business communications are at risk of interception and exfiltration.
• For ISPs or managed service providers: a router with command injection could be leveraged to conduct large-scale attacks against connected subscribers or used as a jumping-off point for attacks on critical infrastructure.

Blast Radius:

• Direct affected systems: Motorola Q14 Mesh Router (all nodes in the mesh system).
• Secondary targets: all devices on the LAN, cloud services accessed by LAN devices (session hijacking via traffic interception), and any remotely accessible infrastructure reachable through the compromised router.

CVSS Dimensions (inferred from score 7.2):

• Confidentiality Impact: High — root access permits reading all configuration data, network credentials, and traffic.
• Integrity Impact: High — attacker can modify firmware, alter routing, inject malicious content.
• Availability Impact: High — attacker can crash the device, disable it, or repurpose it.

Exploitation Likelihood: EPSS score of 0.00954 (≈0.95% probability in the next 30 days) places this CVE in the 58.2 percentile of exploitation likelihood — meaning it is more likely to be exploited than most newly disclosed CVEs. Absence from CISA's KEV means no confirmed in-the-wild exploitation has been recorded to date, but consumer router attacks are frequently underreported, and several similar router command-injection CVEs (from a wide range of vendors) have been weaponized in botnet campaigns (e.g., Mirai variants).

Detection Guidance

Detection of CVE-2022-4002 exploitation attempts is best categorized into network-level detection (IDS/IPS rules matching suspicious request patterns) and host-level detection (log analysis of router management traffic, abnormal process execution).

Sigma Rule

title: Motorola Q14 Mesh Router Command Injection Attempt (CVE-2022-4002)
id: 7f3b92a1-5c4d-4e0e-9b2a-0df9c4b6e8a1
status: experimental
description: Detects potential command injection attempts against Motorola Q14 router management API
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2022-4002
author: Valtersit Threat Intelligence
date: 2024/01/15
logsource:
    category: webserver
    product: motorola_q14
    service: management_api
detection:
    selection_metachar:
        - c-uri|contains:
            - ';'
            - '|'
            - '&&'
            - '`'
            - '$('
            - '%3B'  # URL-encoded ;
            - '%7C'  # URL-encoded |
            - '%26%26'  # URL-encoded &&
        - cs-method: ['POST', 'PUT', 'GET']
    selection_command_patterns:
        - c-uri|contains:
            - 'id;'
            - 'whoami'
            - 'cat+/etc/passwd'
            - 'nc+-e'
            - '/bin/sh'
            - 'wget'
            - 'curl'
            - 'reboot'
            - 'rm+-rf'
    condition: selection_metachar and selection_command_patterns
    timeframe: 10s
level: high
falsepositives:
    - Legitimate API backup or restore requests containing shell-like characters (unlikely)
    - URL parsing of user-provided names containing special characters (if admin panel allows arbitrary characters)
tags:
    - attack.t1190
    - attack.t1059  # Command and Scripting Interpreter
    - cve.2022.4002
    - command.injection

YARA Rule

rule CVE_2022_4002_Motorola_Q14_Router_Command_Injection {
    meta:
        author = "Valtersit Threat Intelligence"
        description = "Detects command injection payload patterns targeting Motorola Q14 Mesh Router management API"
        cve = "CVE-2022-4002"
        date = "2024-01-15"
        severity = "high"
    strings:
        $s1 = "api/" nocase
        $s2 = "cmd=" nocase
        $s3 = "exec=" nocase
        $s4 = "; id" nocase ascii
        $s5 = ";whoami" nocase ascii
        $s6 = "&&" ascii
        $s7 = "| sh" nocase ascii
        $s8 = "$(command)" ascii
        $s9 = "`cmd`" ascii
        $s10 = "cat /etc/passwd" nocase ascii
        $s11 = "wget http" nocase ascii
        $s12 = "/bin/sh" nocase ascii
        $s13 = "telnetd" nocase ascii
        $s14 = "POST" ascii
        $s15 = "/api/" nocase ascii
    condition:
        uint16(0) == 0x0D0A and
        (
            ($s14 at 0 and any of ($s4, $s5, $s6, $s7, $s8, $s9)) or
            (any of ($s1, $s15) and any of ($s10, $s11, $s12, $s13)) or
            (any of ($s2, $s3) and any of ($s4, $s5))
        )
}

Suricata IDS Rule

alert http any any -> $HOME_NET any (msg:"ET EXPLOIT Motorola Q14 Mesh Router Command Injection Attempt (CVE-2022-4002)"; flow:established,to_server; content:"POST"; http_method; content:"/api/"; http_uri; content:"|3B|"; http_uri; content:"id"; http_uri; within:100; sid:20224002; rev:1; classtype:web-application-attack; reference:cve,2022-4002; reference:url,https://nvd.nist.gov/vuln/detail/CVE-2022-4002; threshold:type both, track by_src, count 3, seconds 60;)

Elastic Detection

any where process.name == "sh" and
  command_line != null and
  (
    wildcard(command_line, "*;*") and
    wildcard(command_line, "*id*") or
    wildcard(command_line, "*whoami*") or
    wildcard(command_line, "*cat*") or
    wildcard(command_line, "*/bin/sh*")
  ) and
  parent.process.name in ("httpd", "webserver", "lighttpd", "uhttpd")

Splunk SPL Query

index=proxy OR index=web
| where "POST" LIKE url_* OR method=POST
| where URL LIKE "*/api/*"
| where URL LIKE "*%3B*" OR URL LIKE "*;*" OR URL LIKE "*|*" OR URL LIKE "*%26%26*" OR URL LIKE "*`*" OR URL LIKE "*%24%28*"
| rex field=URL "(?i)(;|%3B)\s*(?<injected_cmd>[a-zA-Z0-9_/]+)"
| stats count by src_ip, dest_ip, URL, injected_cmd
| where count >= 3

Wazuh OSSEC Rule

<rule id="100502" level="12">
    <decoded_as>json</decoded_as>
    <field name="url">\.*\/api\/\.*</field>
    <regex>(\;|\||\&\&|`|\$\().*(id|whoami|cat|sh|wget|curl|reboot|\/bin\/sh)</regex>
    <description>Motorola Q14 Mesh Router Command Injection Attempt (CVE-2022-4002)</description>
    <mitre>
        <id>T1190</id>
        <id>T1059</id>
    </mitre>
    <group>web_application_attack,command_injection,</group>
</rule>

Mitigation & Patch Guidance

Patch confidence: 2/4 (CLAIMED) — the CNA (Motorola) claims a fix in firmware v1.5.0.16, but this patch has not been independently confirmed. Proceed with caution and verify the availability of the update from official channels.

1) Immediate Mitigations (until patched):

• Disable remote management. If the router's management interface must remain accessible from the internet, restrict access to specific trusted IP addresses where the router firmware allows ACL configuration.
• Change all router admin credentials immediately, including Wi-Fi passwords. Use strong, unique passwords. Remove any default credentials that may be in use.
• Disable any guest Wi-Fi networks or ensure they are VLAN-isolated so that guest devices cannot reach the management interface.
• Monitor router logs and management traffic for anomalies, unusual request patterns, or unexpected firmware/configuration changes.
• If supported, restrict management API access to LAN-only and block WAN-to-LAN management traffic via firewall rules.

2) Patch/Upgrade Steps:

• Check the Motorola support website for Q14 Mesh Router firmware updates.
• Download firmware v1.5.0.16 or later (if available from the vendor).
• Follow the vendor's firmware update procedure: access the router management interface, navigate to the firmware/update section, upload the downloaded firmware file, and allow the router to reboot.
• After update, verify the new firmware version is active.
• Factory reset the router following the firmware update to clear any potentially injected persistent components (recommended where operationally acceptable).
• If the claimed patched version is not yet available from the vendor's official site, contact Motorola support to confirm the patch status and obtain clarification. Do not install firmware from third-party sources.

3) Long-Term Hardening:

• Segment IoT/consumer devices from sensitive computing devices; use a separate VLAN or firewall rules to isolate router management from regular traffic.
• Regularly audit router logs for signs of compromise. Monitor for outbound connections from the router to unknown destinations (indicates botnet callback or reverse shell).
• Disable any features that are not in use (remote diagnostics, WPS, UPnP, IPv6 tunneling) to reduce attack surface.
• Establish a regular firmware update cadence — check for updates at least quarterly or whenever the vendor announces security advisories.
• Replace consumer-grade routers with equipment that receives regular, well-supported firmware updates if this CVE demonstrates long-term vendor response issues.
• Consider using open-source router firmware (OpenWrt, DD-WRT) if vendor support proves insufficient, but only if the hardware is compatible and the user accepts the risk of unsupported software.
• In 30 days, re-check for a vendor advisory or an updated firmware release. If the patch remains unconfirmed, elevate this risk internally and consider device replacement.

References

1. NVD Entry: https://nvd.nist.gov/vuln/detail/CVE-2022-4002 — Official CVE record with the NVD description.
2. CISA KEV: Not listed — no confirmed exploitation in the wild recorded by CISA.
3. EPSS Data: https://www.first.org/epss/ — EPSS score 0.00954 (58.2% percentile) for exploitation likelihood.
4. Motorola Support: https://motorola.com/support — Official vendor support page for Q14 Mesh Router firmware updates and security advisories.
5. MITRE ATT&CK: https://attack.mitre.org/tactics/TA0001/ — Initial Access tactics (T1190 — Exploit Public-Facing Application).

Known Threat Actor Campaigns / Exploit-in-the-Wild Evidence: None publicly reported for this specific CVE as of the writing date. CISA KEV does not list CVE-2022-4002, indicating no confirmed in-the-wild exploitation has been reported. However, routers in the consumer segment are frequent targets of botnet operators (Mirai-style variants, Mozi, etc.), and command-injection vulnerabilities in router management interfaces are commonly weaponized even in the absence of a public PoC. The EPSS score percentile (58.2%) suggests moderate interest from the exploitation community. Security teams should treat this CVE as potentially imminent in exploitation likelihood, particularly after a patch becomes widely deployed (which often prompts threat actors to analyze the patch diff and build an exploit).