Difference between revisions of "Direct Static Code Injection"

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==Description==
 
==Description==
  
A Direct Static Code Injection attack consists of injecting code directly onto the resource used by application while processing a user request. This is normally performed by tampering libraries and template files which are created based on user input without proper data sanitization.
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See [[Code Injection]]
Upon a user request to the modified resource, the actions defined in it will be executed at server side in the context of web server process.
 
 
 
[[Server-Side Includes (SSI) Injection | Server Side Includes]] is considered a type of direct static code injection. It should not be confused with other types of code injection, like [[Cross-site Scripting (XSS)| XSS]] (“Cross-site scripting” or “HTML injection”) where the code is executed on the client side.
 
 
 
==Risk Factors==
 
TBD
 
[[Category:FIXME|need content here]]
 
 
 
==Examples==
 
 
 
===Example 1===
 
This is a simple example of exploitation of a CGISCRIPT.NET csSearch 2.3 vulnerability, published on Bugtraq ID: 4368.
 
By requesting the following URL to the server, it’s possible to execute commands defined on the ‘’’’setup’’’ variable.
 
<br>
 
csSearch.cgi?command=savesetup&setup=''PERL_CODE_HERE''
 
<br>
 
For the classic example, the following command can be used to remove all files from “/” folder:
 
csSearch.cgi?command=savesetup&setup=`rm%20-rf%20/`
 
 
 
Note that the above command must be encoded in order to be accepted.
 
 
 
===Example 2===
 
This example exploits a vulnerability on Ultimate PHP Board (UPB) 1.9 (CVE-2003-0395), which allows an attacker to execute random php code. This happens because some user variables, like IP address and User-Agent, are stored in a file that is used by the admin_iplog.php page to show user statistics. When an administrator browses this page, the previously injected code by a malicious request is executed.
 
The following example stores a malicious PHP code that will deface the index.html page when an administrator browses admin_iplog.php.
 
GET /board/index.php HTTP/1.0
 
User-Agent: <? system( "echo \'hacked\' > ../index.html" ); ?>
 
 
 
==Related [[Threat Agents]]==
 
* [[Internal software developer]]
 
 
 
==Related [[Attacks]]==
 
* [[Server-Side Includes (SSI) Injection | Server Side Includes]]
 
* [[ Direct Dynamic Code Evaluation ('Eval Injection')]]
 
 
 
==Related [[Vulnerabilities]]==
 
* [[:Category:Input Validation Vulnerability]]
 
 
 
==Related [[Controls]]==
 
* [[:Category:Input Validation]]
 
 
 
==References==
 
* http://www.seclab.tuwien.ac.at/advisories/TUVSA-0510-001.txt
 
* http://marc.info/?l=bugtraq&m=105379741528925&w=2
 
* http://archives.neohapsis.com/archives/bugtraq/2005-06/0002.html
 
 
 
 
 
[[Category:Injection]]
 
[[Category:Attack]]
 
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Latest revision as of 08:59, 11 November 2014

This is an Attack. To view all attacks, please see the Attack Category page.


Last revision: 11/11/2014

Description

See Code Injection