The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through
5.4.0 does not properly determine a pointer during checks for %0D
sequences (aka carriage return characters), which allows remote
attackers to bypass an HTTP response-splitting protection mechanism
via a crafted URL, related to improper interaction between the PHP
header function and certain browsers, as demonstrated by Internet
Explorer and Google Chrome. NOTE: this vulnerability exists because of
an incorrect fix for CVE-2011-1398.
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MLIST:[internals] 20120203 [PHP-DEV] The case of HTTP response splitting protection in PHP
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