Tor Directory Authority 'policy_summarize' Denial of Service Vulnerability - Windows

# SPDX-FileCopyrightText: 2011 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("1.3.6.1.4.1.25623.1.0.802300");
  script_version("2024-02-15T05:05:39+0000");
  script_tag(name:"last_modification", value:"2024-02-15 05:05:39 +0000 (Thu, 15 Feb 2024)");
  script_tag(name:"creation_date", value:"2011-06-20 15:22:27 +0200 (Mon, 20 Jun 2011)");
  script_cve_id("CVE-2011-1924");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_name("Tor Directory Authority 'policy_summarize' Denial of Service Vulnerability - Windows");
  script_xref(name:"URL", value:"http://secunia.com/advisories/43548");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/46618");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_tor_detect_win.nasl");
  script_mandatory_keys("Tor/Win/Ver");
  script_tag(name:"affected", value:"Tor version prior to 0.2.1.30 on Windows.");
  script_tag(name:"insight", value:"The flaw is caused by a boundary error within the policy_summarize function
  in Tor, which can be exploited to crash a Tor directory authority.");
  script_tag(name:"solution", value:"Upgrade to Tor version 0.2.1.30 or later.");
  script_tag(name:"summary", value:"Tor is prone to a buffer overflow vulnerability.");
  script_tag(name:"impact", value:"Successful exploitation will allow remote attackers to execute arbitrary
  code in the context of the user running the application. Failed exploit
  attempts will likely result in denial-of-service conditions.");
  script_tag(name:"qod_type", value:"registry");
  script_tag(name:"solution_type", value:"VendorFix");
  exit(0);
}


include("version_func.inc");

torVer = get_kb_item("Tor/Win/Ver");
if(!torVer){
  exit(0);
}

torVer = ereg_replace(pattern:"-", replace:".", string:torVer);

if(version_is_less(version:torVer, test_version:"0.2.1.30")){
  report = report_fixed_ver(installed_version:torVer, fixed_version:"0.2.1.30");
  security_message(port: 0, data: report);
}