477bcbdcc0
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89 lines
3.9 KiB
Text
Executable file
89 lines
3.9 KiB
Text
Executable file
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| ____ __________ __ ____ __ |
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| /_ | ____ |__\_____ \ _____/ |_ /_ |/ |_ |
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| | |/ \ | | _(__ <_/ ___\ __\ ______ | \ __\ |
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| | | | \ | |/ \ \___| | /_____/ | || | |
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| |___|___| /\__| /______ /\___ >__| |___||__| |
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| \/\______| \/ \/ |
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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| Sine CMS Local File Inclusion / RCE (Register_globals: ON) |
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| Version: <= 2.3.5 |
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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| Vendor: www.sinecms.net |
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| Discovered by: KiNgOfThEwOrLd |
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Intro:
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Sine cms is affected by a local file inclusion vulnerabily with
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register_globals on.
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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Related code:
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/mods/Integrated/index.php
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<?
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if ($_GET[page]=="source"){
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include "mods/Integrated/source.php";
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} else {
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// cerca la home e la themizza
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include_once ("mods/".$sine[config][index_main]."/index.php");
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$mods = $sine[config][index_main];
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}
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?>
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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PoC:
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Usually, this is a correctly code, with no possible exploitation. But if
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register_globals is ON, we can edit via GET the $sine[config][index_main]
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value, and then, using null byte, we'll get a local file inclusion
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vulnerability like:
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http://localhost/sinecms/mods/Integrated/index.php?sine[config][index_main]=
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{FILE_TO_INCLUDE}%00
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But pay attention, in this way the include_one function will try to include
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"mods/{FILE}"; certainly, using the directory traversal var, we can surf and
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include any files, but "mods/{FILE}" is different from "/mods/{FILE}"! In fact,
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in this case, the script will try to include "/mods/Integrated/mods/{FILE}"!
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So, the cms root path will be accessible with "../../../" and not "../../".
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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How to get a Remote Command Execution
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Sine CMS, allows everybody to send a news with an image, uploadable directly
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on the host. Then, uploading an evil script as an image, we'll get a shell in
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/mods/Core/data/images/{EVIL_IMAGE}. Now, including that file by the local file
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inclusion vulnerability that i've just explaned we'll get a remote command
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execution.
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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Exploit:
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http://localhost/sinecms/mods/Integrated/index.php?sine[config][index_main]=..
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/../Core/data/images/{EVIL}.jpg%00
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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Just a little security issue
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Realted code:
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setup.php @ line 98
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[...]
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if(file_exists("./sine.lock")) $locked=1;
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[...]
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PoC:
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After the installation, sine cms makes a file (sine.lock), to check if the cms
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has been already installed. But the condition is true if "./sine.lock" exist,
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so only if there is sine.lock in the current work dir! Then, including via
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local file inclusion "setup.php" the condition will result false, and we can
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rewrite, delete, or edit the installation.
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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Exploit:
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http://localhost/sinecms/mods/Integrated/index.php?sine[config][index_main]=..
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/../../setup.php%00
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[*]~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[*]
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# milw0rm.com [2008-01-06]
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