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PHP MSSQL Extension NTWDBLIB.DLL "dbopen" Buffer Overflow
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Secunia Advisory:
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SA24353
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Release Date:
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2007-03-07
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Last Update:
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2007-03-14
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Popularity:
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10,909 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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Local system
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Solution Status:
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Unpatched
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| Software: | PHP 4.4.x
PHP 5.2.x
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| CVE reference: | CVE-2007-1411
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Description:
rgod has discovered a vulnerability in PHP's MSSQL Extension, which can be exploited to bypass certain security restrictions.
The vulnerability is caused due to a boundary error when processing arguments within the "dbopen()" function in NTWDBLIB.DLL located in the PHP directory when the MSSQL extension is installed. This can be exploited to cause a stack-based buffer overflow via an overly long (greater than 260 bytes) string passed as argument to e.g. PHP's "mssql_connect()" or "mssql_pconnect()" functions and execute arbitrary code therefore bypassing security restrictions like the "disable_functions" directive.
Successful exploitation requires that the MSSQL extension is installed.
The vulnerability is reported in PHP 4.4.6 and confirmed in the PHP-5.2.1 win32 installer. Other versions may also be affected.
Solution:
Grant only trusted users access to the affected system.
Provided and/or discovered by:
rgod
Changelog:
2007-03-14: Added CVE reference.
Original Advisory:
http://retrogod.altervista.org/php_446_mssql_connect_bof.html
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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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