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CyberSecurity/Web/BountyStory/RemoteCodeExecution/20230314 - $10.000 bounty for exposed .git to RCE.md
| | 1 | + | # $10.000 bounty for exposed .git to RCE |
| | 2 | + | |
| | 3 | + | ### 1. Recon |
| | 4 | + | Using chain of tools: |
| | 5 | + | ``` |
| | 6 | + | amass enum -active -d $1 -brute -w ~/SecLists/Discovery/DNS/subdomains-top1million-110000.txt -o amass.txt |
| | 7 | + | cat amass.txt | aquatone -ports xlarge -out aqua_$1 |
| | 8 | + | nuclei -l aqua_$1/aquatone_urls.txt -t ~/nuclei-templates -es info -o nuclei_$1.txt |
| | 9 | + | ``` |
| | 10 | + | Fortunately, the output of nuclei showed me the exposed .git/ directories:<br> |
| | 11 | + | <br> |
| | 12 | + | Using the git-dumper tool to download the source: |
| | 13 | + | ``` |
| | 14 | + | git-dumper http://example.com/.git/ output |
| | 15 | + | ``` |
| | 16 | + | <br> |
| | 17 | + | |
| | 18 | + | ### 2. Did not Rush |
| | 19 | + | I thought this was a great opportunity to look for serious issues in the code and did not rush to report exposed .git<br> |
| | 20 | + | And so it turned out that in the code they used a call to local bash scripts to save and delete ftp users via the shell_exec() function, which took an unfiltered userinput, which led to the RCE vulnerability<br> |
| | 21 | + | <br> |
| | 22 | + | |
| | 23 | + | ### 3. Preparing Exploit |
| | 24 | + | To craft the request, I also had to take into account a simple validation that required hardcoded secret keys<br> |
| | 25 | + |  |
| | 26 | + | <br> |
| | 27 | + | |
| | 28 | + | ### 4. Final Result |
| | 29 | + | And the final result: |
| | 30 | + | `http://example.com/ftp-upload/sync.php?deluser=INJECTION&secret1=[secret1]&secret2=[sha1 encoded secret2]` |
| | 31 | + |  |
| | 32 | + | <br> |
| | 33 | + | |
| | 34 | + | ## Credit |
| | 35 | + | Based on [Lev Shmelev](https://medium.com/@levshmelevv/10-000-bounty-for-exposed-git-to-rce-304c7e1f54)'s writeup. |
| | 36 | + | <br> |
| | 37 | + | |
| | 38 | + | ## Support |
| | 39 | + | You can Follow [me](https://twitter.com/MeAsHacker_HNA) on twitter or |
| | 40 | + | <br><br><a href="https://www.buymeacoffee.com/NafisiAslH" target="_blank"><img src="https://cdn.buymeacoffee.com/buttons/v2/default-yellow.png" alt="Buy Me A Coffee" style="height: 60px !important;width: 217px !important;" ></a> |
| | 41 | + | |
Hossein NafisiAsl
committed
with
GitHub
1 year ago
1 parent 1bd0f2ab