FreeBSD : awstats -- arbitrary code execution vulnerability (e86fbb5f-0d04-11da-bc08-0001020eed82)

2006-05-13T00:00:00
ID FREEBSD_PKG_E86FBB5F0D0411DABC080001020EED82.NASL
Type nessus
Reporter Tenable
Modified 2013-06-22T00:00:00

Description

An iDEFENSE Security Advisory reports :

Remote exploitation of an input validation vulnerability in AWStats allows remote attackers to execute arbitrary commands.

The problem specifically exists because of insufficient input filtering before passing user-supplied data to an eval() function. As part of the statistics reporting function, AWStats displays information about the most common referrer values that caused users to visit the website. The referrer data is used without proper sanitation in an eval() statement, resulting in the execution of arbitrary perl code.

Successful exploitation results in the execution of arbitrary commands with permissions of the web service. Exploitation will not occur until the stats page has been regenerated with the tainted referrer values from the http access log. Note that AWStats is only vulnerable in situations where at least one URLPlugin is enabled.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2013 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(21528);
  script_version("$Revision: 1.13 $");
  script_cvs_date("$Date: 2013/06/22 00:15:00 $");

  script_cve_id("CVE-2005-1527");

  script_name(english:"FreeBSD : awstats -- arbitrary code execution vulnerability (e86fbb5f-0d04-11da-bc08-0001020eed82)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"An iDEFENSE Security Advisory reports :

Remote exploitation of an input validation vulnerability in AWStats
allows remote attackers to execute arbitrary commands.

The problem specifically exists because of insufficient input
filtering before passing user-supplied data to an eval() function. As
part of the statistics reporting function, AWStats displays
information about the most common referrer values that caused users to
visit the website. The referrer data is used without proper sanitation
in an eval() statement, resulting in the execution of arbitrary perl
code.

Successful exploitation results in the execution of arbitrary commands
with permissions of the web service. Exploitation will not occur until
the stats page has been regenerated with the tainted referrer values
from the http access log. Note that AWStats is only vulnerable in
situations where at least one URLPlugin is enabled."
  );
  # http://marc.theaimsgroup.com/?l=full-disclosure&m=112377934108902
  script_set_attribute(
    attribute:"see_also",
    value:"http://marc.info/?l=full-disclosure&m=112377934108902"
  );
  # http://www.idefense.com/application/poi/display?id=290&type=vulnerabilities
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?21540da6"
  );
  # http://www.freebsd.org/ports/portaudit/e86fbb5f-0d04-11da-bc08-0001020eed82.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ee3dbd92"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:awstats");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2005/08/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2005/08/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/05/13");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2013 Tenable Network Security, Inc.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/FreeBSD/release")) audit(AUDIT_OS_NOT, "FreeBSD");
if (!get_kb_item("Host/FreeBSD/pkg_info")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"awstats<6.4_1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:pkg_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");