The (1) iconv_mime_decode, (2) iconv_substr, and (3) iconv_mime_encode functions 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) by causing a userspace interruption of an internal function, related to the call time pass by reference feature.
lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html
lists.opensuse.org/opensuse-security-announce/2010-10/msg00000.html
php-security.org/2010/05/18/mops-2010-032-php-iconv_mime_decode-interruption-information-leak-vulnerability/index.html
php-security.org/2010/05/18/mops-2010-033-php-iconv_substr-interruption-information-leak-vulnerability/index.html
php-security.org/2010/05/18/mops-2010-034-php-iconv_mime_encode-interruption-information-leak-vulnerability/index.html
marc.info/?l=bugtraq&m=133469208622507&w=2