Siemens SIMATIC NET CP, SINEMA & SCALANCE Integer Overflow (CVE-2021-41990)

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

include('compat.inc');

if (description)
{
  script_id(501592);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/08/24");

  script_cve_id("CVE-2021-41990");
  script_xref(name:"DSA", value:"DSA-4989");
  script_xref(name:"FEDORA", value:"FEDORA-2021-b3df83339e");
  script_xref(name:"FEDORA", value:"FEDORA-2021-0b37146973");
  script_xref(name:"FEDORA", value:"FEDORA-2021-95fab6a482");

  script_name(english:"Siemens SIMATIC NET CP, SINEMA & SCALANCE Integer Overflow (CVE-2021-41990)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"Siemens SIMATIC NET CP, SINEMA and SCALANCE Products Affected 
by Vulnerabilities in Third-Party Component strongSwan. 
The gmp plugin in strongSwan before 5.9.4 has a remote integer
overflow via a crafted certificate with an RSASSA-PSS signature. For
example, this can be triggered by an unrelated self-signed CA
certificate sent by an initiator. Remote code execution cannot occur.

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://github.com/strongswan/strongswan/releases/tag/5.9.4");
  # https://www.strongswan.org/blog/2021/10/18/strongswan-vulnerability-(cve-2021-41990).html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?f4f2d8ca");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4989");
  # https://lists.fedoraproject.org/archives/list/[email protected]/message/WQSQ3BEC22NF4NCDZVCT4P3Q2ZIAJXGJ/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cd6b6abd");
  # https://lists.fedoraproject.org/archives/list/[email protected]/message/5FJSATD2R2XHTG4P63GCMQ2N7EWKMME5/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ea295ec8");
  # https://lists.fedoraproject.org/archives/list/[email protected]/message/Y3TQ32JLJOBJDB2EJKSX2PBPB5NFG2D4/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d5453363");
  script_set_attribute(attribute:"see_also", value:"https://cert-portal.siemens.com/productcert/pdf/ssa-539476.pdf");
  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:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC: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_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-41990");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(190);

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/10/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/03");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5615-0aa00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5804-0ap00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5812-1aa00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5812-1ba00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5816-1aa00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5816-1ba00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5826-2ab00-2ab2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5856-2ea00-3aa1_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5856-2ea00-3da1_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5874-2aa00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5874-3aa00-2aa2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5876-3aa02-2ba2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5876-3aa02-2ea2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5876-4aa00-2ba2_firmware:-");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:siemens:6gk5876-4aa00-2da2_firmware:-");
  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) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Siemens');

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

var vuln_cpes = {
    "cpe:/o:siemens:6gk5804-0ap00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5812-1aa00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5812-1ba00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5816-1aa00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5816-1ba00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5826-2ab00-2ab2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5874-2aa00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5874-3aa00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5876-3aa02-2ba2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5876-3aa02-2ea2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5876-4aa00-2ba2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5876-4aa00-2da2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5856-2ea00-3da1_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5856-2ea00-3aa1_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCEM"},
    "cpe:/o:siemens:6gk5615-0aa00-2aa2_firmware:-" :
        {"versionEndExcluding" : "7.1", "family" : "SCALANCES"}
};

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