Apache < 1.3.31 mod_access IP Address Netmask Rule Bypass

This script is Copyright (C) 2004-2015 George A. Theall


Synopsis :

The remote web server is affected by an access control bypass
vulnerability.

Description :

The remote host is running a version of Apache web server prior to
1.3.31. It is, therefore, affected by an access control bypass
vulnerability due to a failure, on big-endian 64-bit platforms, to
properly match 'allow' or 'deny' rules that contain an IP address but
lack a corresponding netmask.

Nessus has determined the vulnerability exists only by looking at the
Server header returned by the web server running on the target. If the
target is not a big-endian 64-bit platform, consider this a false
positive.

See also :

http://www.apacheweek.com/features/security-13
http://marc.info/?l=apache-cvs&m=107869603013722
http://issues.apache.org/bugzilla/show_bug.cgi?id=23850

Solution :

Upgrade to Apache web server version 1.3.31 or later.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 6.5
(CVSS2#E:H/RL:OF/RC:C)
Public Exploit Available : true

Family: Web Servers

Nessus Plugin ID: 14177 (apache_access_wo_netmask.nasl)

Bugtraq ID: 9829

CVE ID: CVE-2003-0993