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PHP "curl_init()" Safe Mode Bypass Weakness
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Secunia Advisory:
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SA20337
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Release Date:
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2006-05-30
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Last Update:
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2006-08-18
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Popularity:
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13,229 views
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Critical:
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Not 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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Vendor Patch
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| Software: | PHP 4.4.x
PHP 5.0.x
PHP 5.1.x
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| CVE reference: | CVE-2006-2563
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Description:
Maksymilian Arciemowicz has discovered a weakness in PHP, which can be exploited by malicious, local users to bypass certain security restrictions.
The weakness is caused due to an error in the handling of null byte characters in the "curl_init()" PHP function in the curl extension. This can be exploited to bypass the safe mode protection and access other users' files located in the same directory as the running script.
Successful exploitation requires that the curl extension is installed and enabled.
The weakness has been confirmed in versions 5.0.5 and 5.1.4, and has also been reported in version 4.4.2. Other versions may also be affected.
Solution:
PHP 4.4.x:
Update to version 4.4.3.
http://www.php.net/downloads.php
PHP 5.1.x:
Update to version 5.1.5.
http://www.php.net/downloads.php
Do not rely on the safe mode protection for files located in the same directory as untrusted scripts.
Provided and/or discovered by:
Maksymilian Arciemowicz
Changelog:
2006-05-31: Added CVE reference.
2006-08-03: Updated "Solution" section.
2006-08-18: Updated "Solution" section.
Original Advisory:
http://securityreason.com/achievement_securityalert/39
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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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