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PmWiki Unregister "register_globals" Layer Bypass
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Secunia Advisory:
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SA18634
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Release Date:
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2006-01-30
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Last Update:
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2006-02-03
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Popularity:
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6,022 views
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Critical:
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Highly critical
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Impact:
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Security Bypass
Cross Site Scripting
Exposure of system information
Exposure of sensitive information
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| Software: | PmWiki 2.x
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| CVE reference: | CVE-2006-0479
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Description:
Francesco "aScii" Ongaro has discovered a vulnerability in PmWiki, which can be exploited by malicious people to bypass certain security restrictions, conduct cross-site scripting attacks, disclose sensitive information, and compromise a vulnerable system.
The vulnerability is caused due to an error in the unregister "register_globals" layer in the handling of the "GLOBALS" array parameter. This can e.g. be exploited to include arbitrary files from external and local resources, and execute arbitrary HTML and script code in a user's browser session in context of an affected site.
Example:
http://[victim]/pmwiki.php?GLOBALS&GLOBALS[FarmD]=[file]
Successful exploitation requires that "register_globals" is enabled.
It is also possible to disclose the full path to the installation.
The vulnerability has been confirmed in version 2.0.13 and has also been reported in version 2.1 beta 20. Other versions may also be affected.
Solution:
The vulnerability has been fixed in version 2.1 beta 21.
Set "register_globals" to "Off".
Provided and/or discovered by:
Francesco "aScii" Ongaro
Changelog:
2006-02-03: Added CVE reference.
Original Advisory:
http://www.ush.it/2006/01/24/pmwiki-multiple-vulnerabilities/
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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