F-Secure Products Malware Detection Bypass Vulnerability - Windows

# SPDX-FileCopyrightText: 2009 Greenbone AG
# 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-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900362");
  script_version("2025-12-11T05:46:19+0000");
  script_tag(name:"last_modification", value:"2025-12-11 05:46:19 +0000 (Thu, 11 Dec 2025)");
  script_tag(name:"creation_date", value:"2009-06-17 17:54:48 +0200 (Wed, 17 Jun 2009)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_cve_id("CVE-2009-1782");
  script_name("F-Secure Products Malware Detection Bypass Vulnerability - Windows");
  script_xref(name:"URL", value:"http://secunia.com/advisories/35008");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/34849");
  script_xref(name:"URL", value:"http://xforce.iss.net/xforce/xfdb/50346");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2009/1262");
  script_xref(name:"URL", value:"http://www.f-secure.com/en_EMEA/support/security-advisory/fsc-2009-1.html");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_family("Malware");
  script_dependencies("smb_reg_service_pack.nasl");
  script_mandatory_keys("SMB/WindowsVersion");
  script_require_ports(139, 445);

  script_tag(name:"impact", value:"Successful exploitation will let the attacker craft malwares in a
  archive file and spread it across the network to gain access to sensitive
  information or cause damage to the system.");

  script_tag(name:"affected", value:"F-Secure Anti-Virus 2009 and earlier

  F-Secure Client Security 8.0 and earlier

  F-Secure Internet Security 2009 and earlier

  F-Secure Anti-Virus for MIMEsweeper 5.61 and earlier

  F-Secure Anti-Virus for Workstations 8.0 and earlier

  F-Secure Anti-Virus for Windows Servers 8.00 and earlier

  F-Secure Internet Gatekeeper for Windows 6.61 and earlier

  F-Secure Anti-Virus for Microsoft Exchange 7.10 and earlier");

  script_tag(name:"insight", value:"This flaw is due to bug in the antivirus scanning engine which doesn't process
  the malformed crafted malware archives.");

  script_tag(name:"solution", value:"Apply the patch from the referenced advisory.");

  script_tag(name:"summary", value:"F-Secure Product is prone to a malware detection bypass vulnerability.");

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

  exit(0);
}

include("smb_nt.inc");
include("version_func.inc");
include("secpod_smb_func.inc");

if(!get_kb_item("SMB/WindowsVersion")){
  exit(0);
}

if(!registry_key_exists(key:"SOFTWARE\Data Fellows\F-Secure")){
  exit(0);
}

# Anti-Virus for Windows Servers and Internet Security
fsPath = registry_get_sz(key:"SOFTWARE\Data Fellows\F-Secure\Anti-Virus",
                         item:"Path");
if(!fsPath)
{
  fsPath = registry_get_sz(key:"SOFTWARE\Data Fellows\F-Secure" +
                               "\Content Scanner Server", item:"Path");
  if(!fsPath){
    exit(0);
  }
}

fsPath = fsPath + "\fm4av.dll";
share = ereg_replace(pattern:"([a-zA-Z]):.*", replace:"\1$", string:fsPath);
file = ereg_replace(pattern:"[a-zA-Z]:(.*)", replace:"\1", string:fsPath);

dllVer = GetVer(file:file, share:share);
if(!dllVer){
  exit(0);
}

if(version_is_less(version:dllVer, test_version:"3.1.15160.1")){
  report = report_fixed_ver(installed_version:dllVer, fixed_version:"3.1.15160.1", install_path:fsPath);
  security_message(port: 0, data: report);
}