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PHP Interbase Extension "isc_attach_database()" Buffer Overflow
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Secunia Advisory:
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SA24529
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Release Date:
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2007-03-16
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Last Update:
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2007-03-21
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Popularity:
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9,136 views
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Critical:
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Less critical
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Impact:
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Privilege escalation
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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-2007-1475
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Description:
rgod has discovered a vulnerability in PHP's Interbase extension, which can be exploited by malicious users to gain escalated privileges.
The vulnerability is caused due to a boundary error when processing arguments passed to "isc_attach_database()" in GDS32.DLL located in the PHP directory when the Interbase 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 "ibase_connect()" or "ibase_pconnect()" functions and execute arbitrary code therefore bypassing security restrictions like the "disable_functions" directive.
Successful exploitation requires that the Interbase 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 permissions to execute PHP code.
Provided and/or discovered by:
rgod
Changelog:
2007-03-21: Added CVE reference.
Original Advisory:
http://milw0rm.com/exploits/3488
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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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