The (1) parse_str, (2) preg_match, (3) unpack, and (4) pack functions; the (5) ZEND_FETCH_RW, (6) ZEND_CONCAT, and (7) ZEND_ASSIGN_CONCAT opcodes; and the (8) ArrayObject::uasort method in PHP 5.2 through 5.2.13 and 5.3 through 5.3.2 allow context-dependent attackers to obtain sensitive information (memory contents) or trigger memory corruption by causing a userspace interruption of an internal function or handler. NOTE: vectors 2 through 4 are related to the call time pass by reference feature.

References

• https://nvd.nist.gov/vuln/detail/CVE-2010-2191
• https://exchange.xforce.ibmcloud.com/vulnerabilities/59221
• http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2010-10/msg00000.html
• http://marc.info/?l=bugtraq&m=133469208622507&w=2
• http://www.php-security.org/2010/05/31/mops-2010-049-php-parse_str-interruption-memory-corruption-vulnerability/index.html
• http://www.php-security.org/2010/05/31/mops-2010-050-php-preg_match-interruption-information-leak-vulnerability/index.html
• http://www.php-security.org/2010/05/31/mops-2010-051-php-unpack-interruption-information-leak-vulnerability/index.html
• http://www.php-security.org/2010/05/31/mops-2010-052-php-pack-interruption-information-leak-vulnerability/index.html
• http://www.php-security.org/2010/05/31/mops-2010-053-php-zend_fetch_rw-opcode-interruption-information-leak-vulnerability/index.html
• http://www.php-security.org/2010/05/31/mops-2010-054-php-zend_concatzend_assign_concat-opcode-interruption-information-leak-and-memory-corruption-vulnerability/index.html
• http://www.php-security.org/2010/05/31/mops-2010-055-php-arrayobjectuasort-interruption-memory-corruption-vulnerability/index.html