AVG AntiVirus Engine Malware Detection Bypass Vulnerability - Linux

# 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

CPE = "cpe:/a:avg:anti-virus";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.900720");
  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:"2009-06-02 08:16:42 +0200 (Tue, 02 Jun 2009)");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_cve_id("CVE-2009-1784");
  script_name("AVG AntiVirus Engine Malware Detection Bypass Vulnerability - Linux");
  script_xref(name:"URL", value:"http://xforce.iss.net/xforce/xfdb/50426");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/34895");
  script_xref(name:"URL", value:"http://blog.zoller.lu/2009/04/avg-zip-evasion-bypass.html");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_family("Remote file access");
  script_dependencies("gb_avg_av_detect_lin.nasl");
  script_mandatory_keys("avg/antivirus/detected");
  script_tag(name:"impact", value:"Successful exploitation will let the attacker craft malwares in a crafted
  archive file and spread it across the network to gain access to sensitive
  information or cause damage to the remote system.");
  script_tag(name:"affected", value:"AVG Anti-Virus Server Edition prior to 8.5.323 on Linux");
  script_tag(name:"insight", value:"Error in the file parsing engine can be exploited to bypass the anti-virus
  scanning functionality via a specially crafted ZIP or RAR file.");
  script_tag(name:"solution", value:"Upgrade to the AVG Anti-Virus Scanning Engine build 8.5.323.");
  script_tag(name:"summary", value:"AVG AntiVirus Server Edition for Linux is prone to a malware detection bypass vulnerability.");
  script_tag(name:"qod_type", value:"executable_version");
  script_tag(name:"solution_type", value:"VendorFix");
  exit(0);
}

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

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

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

if( version_is_less( version:version, test_version:"8.5.323" ) ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"8.5.323", install_path:location );
  security_message(port: 0, data: report);
  exit( 0 );
}

exit( 99 );