Redis Integer Overflow Vulnerability (GHSA-8wxq-j7rp-g8wj)

# 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("1.3.6.1.4.1.25623.1.0.146369");
  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:"2021-07-23 08:54:20 +0000 (Fri, 23 Jul 2021)");
  script_tag(name:"cvss_base", value:"6.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-07-30 16:28:00 +0000 (Fri, 30 Jul 2021)");

  script_cve_id("CVE-2021-32761");

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

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

  script_name("Redis Integer Overflow Vulnerability (GHSA-8wxq-j7rp-g8wj)");

  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 an integer overflow vulnerability.");

  script_tag(name:"insight", value:"On 32-bit versions, Redis BITFIELD command is vulnerable to
  integer overflow that can potentially be exploited to corrupt the heap, leak arbitrary heap
  contents or trigger remote code execution. The vulnerability involves constructing specially
  crafted bit commands which overflow the bit offset.");

  script_tag(name:"affected", value:"Redis version 2.2 and later.

  This problem only affects 32-bit versions of Redis.");

  script_tag(name:"solution", value:"Update to version 5.0.13, 6.0.15, 6.2.5 or later.");

  script_xref(name:"URL", value:"https://github.com/redis/redis/security/advisories/GHSA-8wxq-j7rp-g8wj");

  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: "2.2", test_version2: "5.0.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.13");
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "6.0", test_version2: "6.0.14")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.0.15");
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "6.2", test_version2: "6.2.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.2.5");
  security_message(port: port, data: report);
  exit(0);
}

exit(99);