Synology Router Manager (SRM) 1.1.x Multiple Vulnerabilities (Synology-SA-18:34) - Unreliable Remote Version Check

# SPDX-FileCopyrightText: 2023 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

CPE = "cpe:/a:synology:router_manager";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.170494");
  script_version("2024-03-15T05:06:15+0000");
  script_tag(name:"last_modification", value:"2024-03-15 05:06:15 +0000 (Fri, 15 Mar 2024)");
  script_tag(name:"creation_date", value:"2023-06-19 08:33:05 +0000 (Mon, 19 Jun 2023)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/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:"2019-10-09 23:34:00 +0000 (Wed, 09 Oct 2019)");

  script_cve_id("CVE-2018-13285", "CVE-2018-13287");

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

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

  script_name("Synology Router Manager (SRM) 1.1.x Multiple Vulnerabilities (Synology-SA-18:34) - Unreliable Remote Version Check");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("General");
  script_dependencies("gb_synology_srm_consolidation.nasl");
  script_mandatory_keys("synology/srm/detected");

  script_tag(name:"summary", value:"Synology Router Manager (SRM) is prone to multiple
  vulnerabilities.");

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

  script_tag(name:"insight", value:"The following vulnerabilities exist:

  - CVE-2018-13285: A command injection vulnerability in ftpd allows remote authenticated users to
  execute arbitrary OS commands via the (1) MKD or (2) RMD command.

  - CVE-2018-13287: An incorrect default permissions vulnerability in synouser.conf allows remote
  authenticated users to obtain sensitive information via the world readable configuration.");

  script_tag(name:"affected", value:"SRM version 1.1.x prior to 1.1.7-6941-1.");

  script_tag(name:"solution", value:"Update to firmware version 1.1.7-6941-1 or later.");

  script_xref(name:"URL", value:"https://www.synology.com/en-global/security/advisory/Synology_SA_18_34");

  exit(0);
}

include("host_details.inc");
include("revisions-lib.inc");
include("version_func.inc");

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

# nb: The patch level version cannot be obtained so when the fix is on a patch level version (e.g.
# 1.1.5-6542-4 and not 1.1.5-6542), there will be 2 VTs with different qod_type.
if (version =~ "^1\.1\.7-6941" && (revcomp(a: version, b: "1.1.7-6941-1") < 0)) {
  report = report_fixed_ver(installed_version: version, fixed_version: "1.1.7-6941-1");
  security_message(port: 0, data: report);
  exit(0);
}

# nb: This is checked by VT 1.3.6.1.4.1.25623.1.0.170493
if (version =~ "^1\.1" && (revcomp(a: version, b: "1.1.7-6941") < 0))
  exit(0);

exit(99);