ClamAV < 0.94.1 get_unicode_name() Off-By-One Heap based BOF Vulnerability

# Copyright (C) 2008 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:clamav:clamav";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.800067");
  script_version("2022-05-11T11:17:52+0000");
  script_tag(name:"last_modification", value:"2022-05-11 11:17:52 +0000 (Wed, 11 May 2022)");
  script_tag(name:"creation_date", value:"2008-11-26 16:25:46 +0100 (Wed, 26 Nov 2008)");
  script_tag(name:"cvss_base", value:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_cve_id("CVE-2008-5050");
  script_name("ClamAV < 0.94.1 get_unicode_name() Off-By-One Heap based BOF Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2008 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("gb_clamav_ssh_login_detect.nasl", "gb_clamav_smb_login_detect.nasl", "gb_clamav_remote_detect.nasl");
  script_mandatory_keys("clamav/detected");

  script_xref(name:"URL", value:"http://secunia.com/advisories/32663");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/32207");
  script_xref(name:"URL", value:"http://xforce.iss.net/xforce/xfdb/46462");
  script_xref(name:"URL", value:"http://www.frsirt.com/english/advisories/2008/3085");
  script_xref(name:"URL", value:"http://sourceforge.net/project/shownotes.php?release_id=637952;group_id=86638");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"impact", value:"A specially crafted VBA project when opened causes heap buffer
  overflow which can be exploited by attackers to execute arbitrary code on the system with clamd
  privileges or cause the application to crash.");

  script_tag(name:"affected", value:"ClamAV before version 0.94.1.");

  script_tag(name:"insight", value:"The flaw exists due to an off-by-one error in the function
  get_unicode_name() in libclamav/vba_extract.c.");

  script_tag(name:"solution", value:"Update to version 0.94.1 or later.");

  script_tag(name:"summary", value:"ClamAV is prone to a denial of service (DoS) vulnerability.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_banner_unreliable");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if( isnull( port = get_app_port( cpe:CPE ) ) )
  exit( 0 );

if( ! infos = get_app_version_and_location( port:port, cpe:CPE, exit_no_version:TRUE ) )
  exit( 0 );

vers = infos["version"];
path = infos["location"];

if( version_is_less( version:vers, test_version:"0.94.1" ) ) {
  report = report_fixed_ver( installed_version:vers, fixed_version:"0.94.1", install_path:path );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );