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[Apple] libtelnet arbitrary C execution Vulnerability

Posted on 30 November -0001

<HTML><HEAD><TITLE>[Apple] libtelnet arbitrary C execution Vulnerability</TITLE><META http-equiv="Content-Type" content="text/html; charset=utf-8"></HEAD><BODY>###########################################################
# Exploit Title  : [Apple] libtelnet arbitrary C execution Vulnerability
# Exploit Author : Ashiyane Digital Security Team
# Vendor Homepage: http://apple.com
# Date           : 2017 23 March
# Category       : Operating system (OS) - Mac OS
# MY HOME        : Ashiyane.org
# Software Link  : https://opensource.apple.com/source/libtelnet/libtelnet-13/read_password.c.auto.html
###########################################################
## Files   : read_password.c
## Details : Some of the code in this program are not filters.
## Code    : stdin
## Patch   : $stdin
###########################################################
###########################################################
########## Vulnerability CODE ##########

    /* Turn off echo */
    tty_state.sg_flags &= ~ECHO;
    if (ioctl(0,TIOCSETP,(char *)&tty_state) == -1)
	return -1;
    while (!ok) {
	(void) printf("%s", prompt);
	(void) fflush(stdout);
	while (!fgets(s, max, stdin));

	if ((ptr = strchr(s, '
')))
	    *ptr = '';
	if (verify) {
	    printf("
Verifying, please re-enter %s",prompt);
	    (void) fflush(stdout);
	    if (!fgets(key_string, sizeof(key_string), stdin)) {
		clearerr(stdin);
		continue;
	    }
	    if ((ptr = strchr(key_string, '
')))
	    *ptr = '';
	    if (strcmp(s,key_string)) {
		printf("
77Mismatch - try again
");
		(void) fflush(stdout);
		continue;
	    }
################################################ 
# Discovered By : Hassan Shakeri  
# Twitter : @ShakeriHassan - Fb.com/General.BlackHat - Me@Seravo.ir 
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