zend_hash_del_key_or_index in zend_hash.c in PHP before 4.4.3 and 5.x before 5.1.3 can cause zend_hash_del to delete the wrong element, which prevents a variable from being unset even when the PHP unset function is called, which might cause the variable's value to be used in security-relevant operations.

PHP before 5.1.3-RC1 might allow remote attackers to obtain portions of memory via crafted binary data sent to a script that processes user input in the html_entity_decode function and sends the encoded results back to the client, aka a "binary safety" issue. NOTE: this issue has been referred to as a "memory leak," but it is an information leak that discloses memory contents.

The c-client library 2000, 2001, or 2004 for PHP before 4.4.4 and 5.x before 5.1.5 do not check the (1) safe_mode or (2) open_basedir functions, and when used in applications that accept user-controlled input for the mailbox argument to the imap_open function, allow remote attackers to obtain access to an IMAP stream data structure and conduct unauthorized IMAP actions.

Argument injection vulnerability in certain PHP 3.x, 4.x, and 5.x applications, when used with sendmail and when accepting remote input for the additional_parameters argument to the mail function, allows remote attackers to read and create arbitrary files via the sendmail -C and -X arguments. NOTE: it could be argued that this is a class of technology-specific vulnerability, instead of a particular instance; if so, then this should not be included in CVE.

Unspecified vulnerability in PHP before 4.4.1, when using the virtual function on Apache 2, allows remote attackers to bypass safe_mode and open_basedir directives.

Multiple vulnerabilities in PHP before 4.4.1 allow remote attackers to bypass safe_mode and open_basedir restrictions via unknown attack vectors in (1) ext/curl and (2) ext/gd.

The RFC1867 file upload feature in PHP 4.x up to 4.4.0 and 5.x up to 5.0.5, when register_globals is enabled, allows remote attackers to modify the GLOBALS array and bypass security protections of PHP applications via a multipart/form-data POST request with a "GLOBALS" fileupload field.

The deserialization code in PHP before 4.3.10 and PHP 5.x up to 5.0.2 allows remote attackers to cause a denial of service and execute arbitrary code via untrusted data to the unserialize function that may trigger "information disclosure, double-free and negative reference index array underflow" results.

Buffer overflow in the exif_read_data function in PHP before 4.3.10 and PHP 5.x up to 5.0.2 allows remote attackers to execute arbitrary code via a long section name in an image file.

php.exe in PHP 3.0 through 4.2.2, when running on Apache, does not terminate properly, which allows remote attackers to cause a denial of service via a direct request without arguments.