The (1) sqlite_single_query and (2) sqlite_array_query functions in ext/sqlite/sqlite.c in PHP 5.2 through 5.2.13 and 5.3 through 5.3.2 allow context-dependent attackers to execute arbitrary code by calling these functions with an empty SQL query, which triggers access of uninitialized memory.
php-security.org/2010/05/07/mops-2010-012-php-sqlite_single_query-uninitialized-memory-usage-vulnerability/index.html
php-security.org/2010/05/07/mops-2010-013-php-sqlite_array_query-uninitialized-memory-usage-vulnerability/index.html
php-security.org/2010/05/07/mops-submission-03-sqlite_single_query-sqlite_array_query-uninitialized-memory-usage/index.html