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The Patch for #1349546 breaks "Allow from" in httpd-2.2.15-60

Having the following Lines allows access for ANY ip:

allow from 10.0.0.1 # 10.0.0.2
deny from all

Actual results:

Access from ANY IP is granted.

Expected results:

Access should only be granted for 10.0.0.1

Additional info:

apache iterates over the allow line so that allow_cmd() in mod_authz_host gets called three times with values:

"10.0.0.1"
"#"
"10.0.0.2"

Simply overwriting '#' with '\0' results in an empty string for the following processing. The emtpy string gets passed to apr_ipsubnet_create(). Unfortunatly in version 1.3 of libapr an emtpy string passes looks_like_ip() (fixed in later versions) and gets parsed by parse_network() resulting in the equivalent of network 0/0. Thus access is granted for ANY ip.

I consider this a serious security bug. It can lead to unintentional exposure  of restricted content.

Cheers

Heinrich

*** This bug has been marked as a duplicate of bug 1489849 ***

Created attachment 1345523 [details]
Allow comments in  allow/deny

patch for mod_authz_host.c that discards anything after '#' in allow/deny

Since the proposed solution (disallowing comments at all) may again break existing configs, I came up with my own patch. In case anyone ist interrested: see attachment.

Cheers

Heinrich