Synology DSM HTTP/2 Implementations Allocation of Resources Without Limits or Throttling (CVE-2019-9518)

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

include('compat.inc');

if (description)
{
  script_id(502416);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/10/01");

  script_cve_id("CVE-2019-9518");

  script_name(english:"Synology DSM HTTP/2 Implementations Allocation of Resources Without Limits or Throttling (CVE-2019-9518)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Some HTTP/2 implementations are vulnerable to a flood of empty frames,
potentially leading to a denial of service. The attacker sends a
stream of frames with an empty payload and without the end-of-stream
flag. These frames can be DATA, HEADERS, CONTINUATION and/or
PUSH_PROMISE. The peer spends time processing each frame
disproportionate to attack bandwidth. This can consume excess CPU.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00031.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a5b121dc");
  # http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00032.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c747aef2");
  script_set_attribute(attribute:"see_also", value:"http://seclists.org/fulldisclosure/2019/Aug/16");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:2925");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:2939");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:2955");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:3892");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2019:4352");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2020:0727");
  # https://github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-002.md
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?5ca4073f");
  script_set_attribute(attribute:"see_also", value:"https://kb.cert.org/vuls/id/605641/");
  script_set_attribute(attribute:"see_also", value:"https://kc.mcafee.com/corporate/index?page=content&id=SB10296");
  # https://lists.apache.org/thread.html/091b518265bce56a16af87b77c8cfacda902a02079e866f9fdf13b61%40%3Cusers.trafficserver.apache.org%3E
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cf085d5b");
  # https://lists.apache.org/thread.html/2653c56545573b528f3f6352a29eccaf498bd6fb2a6a59568d81a61d%40%3Cannounce.trafficserver.apache.org%3E
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?066cfc9b");
  # https://lists.apache.org/thread.html/9317fd092b257a0815434b116a8af8daea6e920b6673f4fd5583d5fe%40%3Ccommits.druid.apache.org%3E
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?65a02f5a");
  # https://lists.apache.org/thread.html/ff5b0821a6985159a832ff6d1a4bd311ac07ecc7db1e2d8bab619107%40%3Cdev.trafficserver.apache.org%3E
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?78ee15e5");
  # https://lists.apache.org/thread.html/r99a625fb17032646d96cd23dec49603ff630e9318e44a686d63046bc%40%3Ccommits.cassandra.apache.org%3E
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?43b89c22");
  # https://lists.apache.org/thread.html/rd31230d01fa6aad18bdadc0720acd1747e53690bd35f73a48e7a9b75%40%3Ccommits.cassandra.apache.org%3E
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?fcf93944");
  # https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4ZQGHE3WTYLYAYJEIDJVF2FIGQTAYPMC/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?226a37e0");
  # https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CMNFX5MNYRWWIMO4BTKYQCGUDMHO3AXP/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e3e14cbd");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/bugtraq/2019/Aug/24");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/bugtraq/2019/Sep/18");
  script_set_attribute(attribute:"see_also", value:"https://security.netapp.com/advisory/ntap-20190823-0005/");
  script_set_attribute(attribute:"see_also", value:"https://support.f5.com/csp/article/K46011592");
  # https://support.f5.com/csp/article/K46011592?utm_source=f5support&amp%3Butm_medium=RSS
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?752779cf");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2019/dsa-4520");
  script_set_attribute(attribute:"see_also", value:"https://www.synology.com/security/advisory/Synology_SA_19_33");
  script_set_attribute(attribute:"solution", value:
"Refer to the vendor advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-9518");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_cwe_id(400, 770);

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/13");
  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: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 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" : "6.2.2-24922-4", "versionStartIncluding" : "6.2", "family" : "DiskStation"}
};

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