The MITRE CVE dictionary describes this issue as:
protocol.c in the Apache HTTP Server 2.2.x through 2.2.21 does not properly restrict header information during construction of Bad Request (aka 400) error documents, which allows remote attackers to obtain the values of HTTPOnly cookies via vectors involving a (1) long or (2) malformed header in conjunction with crafted web script.
Find out more about CVE-2012-0053 from the
MITRE CVE dictionary dictionary and
This issue affects httpd packages as shipped with Red Hat Enterprise Linux 3 and 4, which are now in the Extended Life Phase of their life cycle. Therefore this issue is not planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/