Qt 'QSslSocketBackendPrivate::transmit()' Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2010 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("1.3.6.1.4.1.25623.1.0.801235");
  script_version("2023-07-28T16:09:07+0000");
  script_tag(name:"last_modification", value:"2023-07-28 16:09:07 +0000 (Fri, 28 Jul 2023)");
  script_tag(name:"creation_date", value:"2010-07-26 16:14:51 +0200 (Mon, 26 Jul 2010)");
  script_cve_id("CVE-2010-2621");
  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("Qt 'QSslSocketBackendPrivate::transmit()' Denial of Service Vulnerability");
  script_xref(name:"URL", value:"http://secunia.com/advisories/40389");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/41250");
  script_xref(name:"URL", value:"http://aluigi.altervista.org/adv/qtsslame-adv.txt");
  script_xref(name:"URL", value:"http://www.vupen.com/english/advisories/2010/1657");

  script_tag(name:"qod_type", value:"registry");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("gb_qt_detect.nasl");
  script_mandatory_keys("Qt/Ver");
  script_tag(name:"impact", value:"Successful exploitation will allow attacker to cause a denial of
service.");
  script_tag(name:"affected", value:"Qt Version 4.6.3 and prior.");
  script_tag(name:"insight", value:"This flaw is due to an endless loop within the
'QSslSocketBackendPrivate::transmit()' function in
'src/network/ssl/qsslsocket_openssl.cpp'. This can be exploited to
exhaust CPU resources in server applications using the QSslSocket class.");
  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"solution", value:"Upgrade to version 4.6.4 or later.");

  script_tag(name:"summary", value:"Qt is prone to a denial of service (DoS) vulnerability.");
  exit(0);
}

include("version_func.inc");

ver = get_kb_item("Qt/Ver");
if(!ver)
  exit(0);

if(version_is_less_equal(version:ver, test_version:"4.6.3") ){
  report = report_fixed_ver(installed_version:ver, vulnerable_range:"Less than or equal to 4.6.3");
  security_message(port: 0, data: report);
}