> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/pt-br/web-vulnerabilities/race-condition-attack/race-condition-file-write-pentesting-web.md).

# Escrita de arquivo por condição de corrida

Cada vez que pesquisamos um diretório, um **shared-file.txt** arquivo é criado e armazenado em:

<figure><img src="/files/6590d70d3c289f7fc0bcda0f20ff0b921b275fcd" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/717933ea7ddbb0b6aac233e190c45c0720fc2ff0" alt=""><figcaption></figcaption></figure>

Aqui está o **código** do RaceCondition-file-write:

<figure><img src="/files/eb8818617634a5f9a4f2d75544b4fd5e0866afd2" alt=""><figcaption></figcaption></figure>

1. nós definimos **nas solicitações do listener** na filtragem pelo campo que nos interessa:

```bash
while true; do curl -s -X GET 'http://localhost:5000/test' | grep -v "test"; done

```

2. De [Burp Suite](/pt-br/hacking-tools/web/burpsuite.md), enviamos várias solicitações ao mesmo tempo para outra URL:

<figure><img src="/files/e452925aef30ccaba0ababb56e5f3deb6dc2819e" alt=""><figcaption></figcaption></figure>

3. Como ele fica saturado de tempos em tempos, nós **recebemos o código** de outro arquivo:

<figure><img src="/files/d331bb3e90a6f9077d984b34ed488e0264103632" alt=""><figcaption></figcaption></figure>


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