Apache 2.0.49 places no limit on the amount of folding of input headers, or in the total length after folding. With an input stream with infinite headers to be folded, the server will allocate as much memory as the system will allow, possibly leading to a denial of service. Public by Georgi Guninski to full-disclosure list Jun28 CAN-2004-0493 Affects: FC1 CAN-2004-0493 Affects: FC2
The Apache team provides a patch solving this vulnerability: http://www.apache.org/dist/httpd/patches/apply_to_2.0.49/CAN-2004-0493.patch This patch applies and works for me with httpd-2.0.49 fine, here.
Fixed by http://fedoranews.org/updates/FEDORA-2004-204.shtml.