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phpBB "avatar_path" PHP Code Execution Vulnerability
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Secunia Advisory:
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SA22188
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Release Date:
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2006-10-04
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Last Update:
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2007-01-05
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Popularity:
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13,486 views
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Critical:
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Less critical
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Impact:
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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: | phpBB 2.x
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| CVE reference: | CVE-2006-4758
CVE-2006-6839
CVE-2006-6840
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Description:
ShAnKaR has discovered a vulnerability in phpBB, which can be exploited by malicious users to compromise a vulnerable system.
Input passed to the "avatar_path" parameter in admin/admin_board.php is not properly sanitised before being used as a configuration variable to store avatar images. This can be exploited to upload and execute arbitrary PHP code by changing "avatar_path" to a file with a trailing NULL byte.
Successful exploitation requires privileges to the administration section.
The vulnerability has been confirmed in version 2.0.21. Prior versions may also be affected.
Solution:
Update to version 2.0.22.
Provided and/or discovered by:
ShAnKaR
Changelog:
2006-12-28: Updated "Solution" section.
2007-01-05: Added CVE reference.
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About this Secunia Advisory
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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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