{
  "affected": [
    {
      "package": {
        "ecosystem": "PyPI",
        "name": "motioneye"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.44.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-22",
      "CWE-269",
      "CWE-306",
      "CWE-347",
      "CWE-434"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-23T18:53:04Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "## Summary\nA multi\u2011stage chain in motionEye leads to remote code execution. The chain combines:\n\n1. **Arbitrary file read (LFI)** via the picture download endpoint for **local motion cameras** using absolute paths.\n2. **Pass\u2011the\u2011hash admin auth** due to accepting request signatures computed with password hashes.\n3. **Unsafe config restore** that extracts attacker\u2011controlled tarballs into `CONF_PATH`.\n4. **Unauthenticated action execution** via `/action/\u003cid\u003e/\u003caction\u003e`.\n\nIf the **normal user password is unset**, the chain becomes **unauthenticated RCE**. If a normal password exists, a **normal user** can still achieve **admin escalation and RCE**.\n\n---\n\n## Affected Code (motionEye repo)\n\n### 1) LFI (absolute path) \u2014 `picture/\u003cid\u003e/download`\n**Files:**\n- `motioneye/motioneye/handlers/picture.py` \u2192 `download()` (local motion camera branch)\n- `motioneye/motioneye/mediafiles.py` \u2192 `get_media_content()`\n\n**Issue:** `get_media_content()` only blocks `..` and then joins `target_dir` with `path`. Absolute paths (e.g. `/etc/hosts`) bypass the join and are read directly.\n\n### 2) Pass\u2011the\u2011hash admin auth\n**File:** `motioneye/motioneye/handlers/base.py` \u2192 `get_current_user()`\n\n**Issue:** The signature check allows signatures computed using the **admin password hash** (SHA1) as the key. If the hash is leaked (via LFI), admin access can be obtained without the plaintext password.\n\n### 3) Unsafe restore (tar extraction)\n**File:** `motioneye/motioneye/config.py` \u2192 `restore()`\n\n**Issue:** `tar zxC CONF_PATH` is used on user\u2011supplied data without sanitizing entries. A crafted tar can drop executable files into `CONF_PATH`.\n\n### 4) Unauthenticated action execution\n**File:** `motioneye/motioneye/handlers/action.py` \u2192 `post()`\n\n**Issue:** No authentication decorator is present. It executes `\u003caction\u003e_\u003ccamera_id\u003e` found in `CONF_PATH` with `subprocess.Popen`.\n\n---\n\n## Exploit Chain (Detailed)\n\n1. **Create or find a local motion camera id** (local motion cameras are required for the vulnerable LFI path).\n2. **LFI via picture download**:\n   - Request: `/picture/\u003cid\u003e/download/\u003cabsolute_path\u003e`\n   - Example: `/picture/1/download/%2Fetc%2Fhosts`\n   - Result: Arbitrary file read.\n3. **Read admin hash** from `/etc/motioneye/motion.conf`:\n   - Contains `@admin_password \u003cSHA1_HASH\u003e`.\n4. **Pass\u2011the\u2011hash admin**:\n   - Compute signature for `/config/restore?_username=admin` using the **hash** as key.\n   - Admin access is accepted with hash\u2011based signatures.\n5. **Restore malicious tar**:\n   - Upload a tar containing `lock_\u003cid\u003e` (or any action) as an executable.\n   - File is written into `CONF_PATH` by restore.\n6. **Trigger unauth action**:\n   - POST `/action/\u003cid\u003e/lock`\n   - The server executes the injected file.\n\n---\n\n## Proof of Execution (Observed Output)\nIn local testing, the injected action created a marker file:\n\n```\n/tmp/meye_rce_ok\n```\n\nVerification command:\n```\ndocker exec -it motioneye ls -la /tmp | grep meye_rce_ok\n```\nExample output:\n```\n-rw-r--r-- 1 root root 0 ... /tmp/meye_rce_ok\n```\n\n---\n\n## Preconditions / Requirements\n\n- At least **one local motion camera** exists (e.g., `netcam_url`, `videodevice`).\n- `picture/\u003cid\u003e/download` is reachable:\n  - **Unauth** if `@normal_password` is empty (default in some installs).\n  - **Auth required** if normal password is set (attacker needs normal creds).\n\n---\n\n## Impact\n- **Unauth RCE** (normal password unset).\n- **Authenticated RCE** (normal user \u2192 admin \u2192 RCE).\n- Arbitrary file read on server filesystem.\n- Full compromise of motionEye process account.\n\n---\n\n## Suggested Fixes\n1. **Block absolute paths** in `get_media_content()` and `get_media_path()`.\n2. **Remove hash\u2011based signature acceptance**; only accept signatures computed with plaintext passwords.\n3. **Harden restore**: reject absolute paths, `..`, symlinks, non\u2011regular files.\n4. **Require authentication** on `ActionHandler` (admin\u2011only).",
  "id": "GHSA-qxvg-h7q2-hcxh",
  "modified": "2026-06-23T18:53:04Z",
  "published": "2026-06-23T18:53:04Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/motioneye-project/motioneye/security/advisories/GHSA-qxvg-h7q2-hcxh"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/motioneye-project/motioneye"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "motionEye: LFI \u2192 pass\u2011the\u2011hash admin \u2192 unsafe restore \u2192 unauth action exec (RCE)"
}