Redis Heap Overflow Vulnerability (Oct 2020)

# Copyright (C) 2021 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:redis:redis";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.145709");
  script_version("2021-08-24T09:01:06+0000");
  script_tag(name:"last_modification", value:"2021-08-24 09:01:06 +0000 (Tue, 24 Aug 2021)");
  script_tag(name:"creation_date", value:"2021-04-13 06:32:35 +0000 (Tue, 13 Apr 2021)");
  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_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-04-05 18:37:00 +0000 (Mon, 05 Apr 2021)");

  script_cve_id("CVE-2021-3470");

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

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

  script_name("Redis Heap Overflow Vulnerability (Oct 2020)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Databases");
  script_dependencies("gb_redis_detect.nasl");
  script_mandatory_keys("redis/installed");

  script_tag(name:"summary", value:"Redis is prone to a heap overflow vulnerability.");

  script_tag(name:"insight", value:"A heap overflow issue was found in Redis when using a heap allocator other
  than jemalloc or glibc's malloc, leading to potential out of bound write or process crash. Effectively this
  flaw does not affect the vast majority of users, who use jemalloc or glibc malloc.");

  script_tag(name:"affected", value:"Redis versions 5.0.9 and prior and 6.x prior to 6.0.9.");

  script_tag(name:"solution", value:"Update to version 5.0.10, 6.0.9 or later.");

  script_xref(name:"URL", value:"https://github.com/redis/redis/pull/7963");
  script_xref(name:"URL", value:"https://raw.githubusercontent.com/redis/redis/5.0.10/00-RELEASENOTES");
  script_xref(name:"URL", value:"https://raw.githubusercontent.com/redis/redis/6.0.9/00-RELEASENOTES");

  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_is_less(version: version, test_version: "5.0.10")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.10");
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "6.0", test_version2: "6.0.8")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.0.9");
  security_message(port: port, data: report);
  exit(0);
}

exit(99);