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CVE-2012-0911

Status Candidate

Overview

TikiWiki CMS/Groupware before 6.7 LTS and before 8.4 allows remote attackers to execute arbitrary PHP code via a crafted serialized object in the (1) cookieName to lib/banners/bannerlib.php; (2) printpages or (3) printstructures parameter to (a) tiki-print_multi_pages.php or (b) tiki-print_pages.php; or (4) sendpages, (5) sendstructures, or (6) sendarticles parameter to tiki-send_objects.php, which is not properly handled when processed by the unserialize function.

Related Files

Tiki Wiki <= 8.3 unserialize() PHP Code Execution
Posted Jul 6, 2012
Authored by EgiX, juan vazquez | Site metasploit.com

This Metasploit module exploits a php unserialize() vulnerability in Tiki Wiki <= 8.3 which could be abused to allow unauthenticated users to execute arbitrary code under the context of the webserver user. The dangerous unserialize() exists in the 'tiki-print_multi_pages.php' script, which is called with user controlled data from the 'printpages' parameter. The exploit abuses the __destruct() method from the Zend_Pdf_ElementFactory_Proxy class to write arbitrary PHP code to a file on the Tiki Wiki web directory. In order to run successfully three conditions must be satisfied (1) display_errors php setting must be On to disclose the filesystem path of Tiki Wiki, (2) The Tiki Wiki Multiprint feature must be enabled to exploit the unserialize() and (3) a php version older than 5.3.4 must be used to allow poison null bytes in filesystem related functions. The exploit has been tested successfully on Ubuntu 9.10 and Tiki Wiki 8.3.

tags | exploit, web, arbitrary, php
systems | linux, ubuntu
advisories | CVE-2012-0911
SHA-256 | 04e6daabf6b6a5dba1b8fa576bc4f910b4df1c7b90652847142a832796744523
Tiki Wiki CMS Groupware 8.3 Code Execution
Posted Jul 4, 2012
Authored by EgiX

Tiki Wiki CMS Groupware versions 8.3 and below suffer from an unserialize() PHP code execution vulnerability.

tags | exploit, php, code execution
advisories | CVE-2012-0911
SHA-256 | 1131c8a6485c082585a271f33d7953e4f5c4c0779bc61c2352ed14fa8c3a700a
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