Synology DiskStation Manager Use of Insufficiently Random Values (CVE-2018-13280)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(502413);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/02/19");

  script_cve_id("CVE-2018-13280");

  script_name(english:"Synology DiskStation Manager Use of Insufficiently Random Values (CVE-2018-13280)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Use of insufficiently random values vulnerability in
SYNO.Encryption.GenRandomKey in Synology DiskStation Manager (DSM)
before 6.2-23739 allows man-in-the-middle attackers to compromise non-
HTTPS sessions via unspecified vectors.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  script_set_attribute(attribute:"see_also", value:"https://www.synology.com/en-global/support/security/Synology_SA_18_39");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-13280");
  script_set_attribute(attribute:"cvss3_score_rationale", value:"Scoring adjustsed to align with CVSS 3.1 attack complexity guidance.");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(330);

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/07/30");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/07/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/10/01");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:synology:diskstation_manager:5.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:synology:diskstation_manager:6.2");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2024-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Synology");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Synology');

var asset = tenable_ot::assets::get(vendor:'Synology');

var vuln_cpes = {
    "cpe:/a:synology:diskstation_manager:6.2" :
        {"versionEndExcluding" : "6.2-23739", "versionStartIncluding" : "6.2", "family" : "DiskStation"},
    "cpe:/a:synology:diskstation_manager:5.2" :
        {"versionEndExcluding" : "6.1.7-15284", "versionStartIncluding" : "5.2", "family" : "DiskStation"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_WARNING);