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phpBB "Allow HTML" Script Insertion Security Issue
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Secunia Advisory:
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SA18125
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Release Date:
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2005-12-19
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Last Update:
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2006-04-14
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Popularity:
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18,345 views
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Critical:
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Less critical
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Impact:
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Cross Site Scripting
Exposure of system information
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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: | phpBB 2.x
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Secunia CVSS-2 Score:
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Available in Secunia business solutions 
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| Advisory Content (Page 1 of 3) | [ 1 ] [ 2 ] [ 3 ] | |
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Description:
Maksymilian Arciemowicz has discovered a security issue in phpBB, which can be exploited by malicious people to conduct script insertion attacks.
Input passed in the message body when posting isn't properly sanitised before being used. This can be exploited to inject arbitrary JavaScript code, which will be executed in a user's browser session in context of an affected site when the malicious post is viewed.
Example:
<B C=">" onmouseover="[code]" X="<B "> H E L O </B>
Successful exploitation requires that "Allow HTML" is enabled (not default setting).
It is also possible to disclose the full path to "admin/admin_disallow.php" by accessing it directly with the "setmodules" parameter set to "1" (requires that "register_globals" is enabled).
The security issue has been confirmed in version 2.0.18 and has been inadequately fixed in version 2.0.19 (it is possible to bypass the fix by using single-quote characters instead of double-quote characters). Prior versions may also be affected.
Change Page:
[ 1 ] [ 2 ] [ 3 ]
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