PHP Post File Upload Buffer Overflow Vulnerabilities

PHP is a widely deployed scripting language, designed for web based development and CGI programming.

PHP does not perform proper bounds checking on in functions related to Form-based File Uploads in HTML (RFC1867). Specifically, this problem occurs in the functions which are used to decode MIME encoded files. As a result, it may be possible to overrun the buffer used for the vulnerable functions to cause arbitrary attacker-supplied instructions to be executed.

PHP is invoked through webservers remotely. It may be possible for remote attackers to execute this vulnerability to gain access to target systems. A vulnerable PHP interpreter module is available for Apache servers that is often enabled by default.


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