Squid Security Update Advisory (SQUID-2019:5)

# Copyright (C) 2019 Greenbone Networks GmbH
# 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-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:squid-cache:squid";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.142633");
  script_version("2023-03-02T10:19:53+0000");
  script_tag(name:"last_modification", value:"2023-03-02 10:19:53 +0000 (Thu, 02 Mar 2023)");
  script_tag(name:"creation_date", value:"2019-07-19 08:08:43 +0000 (Fri, 19 Jul 2019)");
  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_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-02-28 20:49:00 +0000 (Tue, 28 Feb 2023)");

  script_cve_id("CVE-2019-12527");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

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

  script_name("Squid Security Update Advisory (SQUID-2019:5)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("Web Servers");
  script_dependencies("gb_squid_http_detect.nasl");
  script_mandatory_keys("squid/detected");

  script_tag(name:"summary", value:"Squid is prone to a heap overflow vulnerability due to incorrect buffer
  management when processing HTTP Authentication credentials.");

  script_tag(name:"insight", value:"This allows a malicious client to write a substantial amount of arbitrary data
  to the heap. Potentially gaining ability to execute arbitrary code.

  On systems with memory access protections this can result in the Squid process being terminated unexpectedly.
  Resulting in a denial of service for all clients using the proxy.

  This issue is limited to traffic accessing the Squid Cache Manager reports or using the FTP protocol gateway.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"affected", value:"Squid versions 4.0.23 through 4.7.");

  script_tag(name:"solution", value:"Update to version 4.8 or later.");

  script_xref(name:"URL", value:"http://www.squid-cache.org/Advisories/SQUID-2019_5.txt");

  exit(0);
}

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

if (!port = get_app_port(cpe: CPE))
  exit(0);

if (!version = get_app_version(cpe: CPE, port: port))
  exit(0);

if (version_in_range(version: version, test_version: "4.0.23", test_version2: "4.7")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.8");
  security_message(port: port, data: report);
  exit(0);
}

exit(99);