You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
242 lines
6.4 KiB
242 lines
6.4 KiB
// Copyright 2007-2010 Mir Calculate Ltd. http://www.calculate-linux.org
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
|
|
// for password
|
|
#include <sys/types.h>
|
|
#include <pwd.h>
|
|
|
|
// for strcpy strlen
|
|
#include <string.h>
|
|
|
|
// for keystore kernel
|
|
#include <keyutils.h>
|
|
|
|
// for statistics file
|
|
#include <fcntl.h>
|
|
#include <sys/stat.h>
|
|
|
|
int main( int argc, const char* argv[] )
|
|
{
|
|
// user id and gid
|
|
uid_t uid, gid;
|
|
int ret;
|
|
int rez1,rez2;
|
|
void *buffer;
|
|
if (argc==1)
|
|
{
|
|
// get user id and gid
|
|
uid = getuid();
|
|
gid = getgid();
|
|
// set user id and gid for the process
|
|
rez1 = setgid(gid);
|
|
rez2 = setuid(uid);
|
|
if (rez1==-1||rez2==-1)
|
|
{
|
|
printf ("exec not SUID root\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
// find user key in keystore
|
|
ret = request_key("user", "tmp", NULL, 0);
|
|
if (ret < 0)
|
|
{
|
|
printf ("id_key not found\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
// get user key
|
|
int retf;
|
|
retf = keyctl_read_alloc(ret, &buffer);
|
|
if (retf < 0)
|
|
{
|
|
printf("error keyctl_read_alloc\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
printf ("%s", (char*) buffer);
|
|
buffer = "XXXXXXXX";
|
|
key_serial_t dest;
|
|
// get id user key
|
|
dest = KEY_SPEC_USER_SESSION_KEYRING;
|
|
// write key in user space
|
|
ret = add_key("user", "tmp", buffer, strlen(buffer), dest);
|
|
exit(EXIT_SUCCESS);
|
|
};
|
|
if (argc!=3)
|
|
{
|
|
printf("Error: needed two argument\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
// get user id and gid
|
|
uid = getuid();
|
|
gid = getgid();
|
|
|
|
char * prog_name[11];
|
|
char * prog_path[11];
|
|
char * prog_sring[11];
|
|
int count_prog =11;
|
|
|
|
// identifiers and paths to programs
|
|
prog_name[0] = "rdesktop";
|
|
prog_path[0] = "/usr/bin/rdesktop";
|
|
prog_sring[0] = NULL;
|
|
prog_name[1] = "rdesktop1";
|
|
prog_path[1] = "/usr/bin/rdesktop";
|
|
prog_sring[1] = "/usr/bin/kstart --window=.* --desktop=1";
|
|
prog_name[2] = "rdesktop2";
|
|
prog_path[2] = "/usr/bin/rdesktop";
|
|
prog_sring[2] = "/usr/bin/kstart --window=.* --desktop=2";
|
|
prog_name[3] = "rdesktop3";
|
|
prog_path[3] = "/usr/bin/rdesktop";
|
|
prog_sring[3] = "/usr/bin/kstart --window=.* --desktop=3";
|
|
prog_name[4] = "rdesktop4";
|
|
prog_path[4] = "/usr/bin/rdesktop";
|
|
prog_sring[4] = "/usr/bin/kstart --window=.* --desktop=4";
|
|
prog_name[5] = "rdesktop5";
|
|
prog_path[5] = "/usr/bin/rdesktop";
|
|
prog_sring[5] = "/usr/bin/kstart --window=.* --desktop=5";
|
|
prog_name[6] = "rdesktop6";
|
|
prog_path[6] = "/usr/bin/rdesktop";
|
|
prog_sring[6] = "/usr/bin/kstart --window=.* --desktop=6";
|
|
prog_name[7] = "rdesktop7";
|
|
prog_path[7] = "/usr/bin/rdesktop";
|
|
prog_sring[7] = "/usr/bin/kstart --window=.* --desktop=7";
|
|
prog_name[8] = "rdesktop8";
|
|
prog_path[8] = "/usr/bin/rdesktop";
|
|
prog_sring[8] = "/usr/bin/kstart --window=.* --desktop=8";
|
|
prog_name[9] = "rdesktop9";
|
|
prog_path[9] = "/usr/bin/rdesktop";
|
|
prog_sring[9] = "/usr/bin/kstart --window=.* --desktop=9";
|
|
|
|
prog_name[10] = "xfreerdp";
|
|
prog_path[10] = "/usr/bin/xfreerdp";
|
|
prog_sring[10] = NULL;
|
|
// path to the running program
|
|
char * str_prog = NULL;
|
|
// if kstart
|
|
char * str_prog_ks = NULL;
|
|
|
|
int i;
|
|
for (i=0;i<count_prog;i++)
|
|
{
|
|
if (strcmp(prog_name[i],argv[1])==0)
|
|
{
|
|
str_prog = prog_path[i];
|
|
str_prog_ks = prog_sring[i];
|
|
break;
|
|
};
|
|
};
|
|
|
|
if (str_prog == NULL)
|
|
{
|
|
printf ("False program\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
|
|
struct stat bufS;
|
|
int res;
|
|
int fd;
|
|
// file permissions for check
|
|
int mode_file = 33261;
|
|
fd = open(str_prog, O_RDONLY);
|
|
res = fstat(fd,&bufS);
|
|
|
|
if (res==0)
|
|
{
|
|
close(fd);
|
|
}else
|
|
{
|
|
printf("No open file %s\n",str_prog);
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
// comparison of permissions and owner of the executable file with the sample
|
|
if (bufS.st_mode == mode_file && bufS.st_uid == 0 && bufS.st_gid == 0)
|
|
{
|
|
struct passwd *pwd = getpwuid (uid);
|
|
if (pwd == NULL)
|
|
{
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
// get user name
|
|
char *login;
|
|
login = (char*) malloc (strlen(pwd->pw_name)+1);
|
|
strcpy (login,pwd->pw_name);
|
|
|
|
// set permissions root
|
|
rez1 = setgid(0);
|
|
rez2 = setuid(0);
|
|
|
|
if (rez1==-1||rez2==-1)
|
|
{
|
|
printf ("Exec not SUID root\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
|
|
int ret;
|
|
// find user key in keystore
|
|
ret = request_key("user", login, NULL, 0);
|
|
if (ret < 0)
|
|
{
|
|
printf ("id_key not found\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
|
|
// get user key
|
|
ret = keyctl_read_alloc(ret, &buffer);
|
|
if (ret < 0)
|
|
{
|
|
printf("error keyctl_read_alloc\n");
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
// set user id and gid for the process
|
|
rez1 = setgid(gid);
|
|
rez2 = setuid(uid);
|
|
if (rez1==-1||rez2==-1)
|
|
{
|
|
printf ("exec not SUID root\n");
|
|
exit(EXIT_FAILURE);
|
|
};
|
|
key_serial_t dest;
|
|
// get id user key
|
|
dest = KEY_SPEC_USER_SESSION_KEYRING;
|
|
|
|
// write key in user space
|
|
ret = add_key("user", "tmp", buffer, strlen(buffer), dest);
|
|
|
|
// allocate memory and create a line running
|
|
char *buff;
|
|
if (str_prog_ks == NULL)
|
|
{
|
|
char *com = "keyexec | %s %s";
|
|
buff = (char*) malloc (strlen(com)+strlen(str_prog)+strlen(argv[2])+1);
|
|
sprintf (buff, com, str_prog, argv[2]);
|
|
}
|
|
else
|
|
{
|
|
char *com = "%s keyexec | %s %s";
|
|
buff = (char*) malloc (strlen(str_prog_ks)+strlen(com)+strlen(buffer)+strlen(str_prog)+strlen(argv[2])+1);
|
|
sprintf (buff, com, str_prog_ks, str_prog, argv[2]);
|
|
};
|
|
// running program
|
|
system(buff);
|
|
free(login);
|
|
free (buff);
|
|
exit(EXIT_SUCCESS);
|
|
};
|
|
printf ("Executed file %s not valid\n",str_prog);
|
|
exit(EXIT_FAILURE);
|
|
}
|