IBM Storwize 1.5.x / 1.6.x < 1.6.2.0 RC4 Initial Keystream Bias Vulnerability (CVE-2017-1375)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(104388);
  script_version("1.6");
  script_cvs_date("Date: 2019/11/12");

  script_cve_id("CVE-2017-1375");
  script_bugtraq_id(101561);

  script_name(english:"IBM Storwize 1.5.x / 1.6.x < 1.6.2.0 RC4 Initial Keystream Bias Vulnerability (CVE-2017-1375)");
  script_summary(english:"Checks for vulnerable Storwize models.");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by a weak encryption vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the IBM Storwize server
running on the remote host uses a weak encryption algorithm that
contains a flaw in the initial keystream generation that introduces
several types of biases. These can be used in a cryptanalysis attack
to disclose sensitive information.");
  script_set_attribute(attribute:"see_also", value:"http://www-01.ibm.com/support/docview.wss?uid=ssg1S1010657");
  script_set_attribute(attribute:"solution", value:
"Upgrade to IBM Storwize version 1.6.2.0 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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:L/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-2017-1375");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/11/03");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:ibm:storwize_v7000_unified");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:storwize_v7000_software");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ibm_storwize_detect.nbin");
  script_require_ports("Host/IBM/Storwize/version", "Host/IBM/Storwize/machine_major", "Host/IBM/Storwize/display_name");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");

version = get_kb_item_or_exit("Host/IBM/Storwize/version");
machine_major = get_kb_item_or_exit("Host/IBM/Storwize/machine_major");
display_name = get_kb_item_or_exit("Host/IBM/Storwize/display_name");

# audit out if it isn't an affected device
if (
  machine_major != "2073" # Storwize V7000 Unified
) audit(AUDIT_DEVICE_NOT_VULN, display_name);

if (version == UNKNOWN_VER)
  audit(AUDIT_UNKNOWN_APP_VER, display_name);

# 1.5.x and 1.6.x < 1.6.2.0
if (version =~ "^1\.[56]\.")
  fix = "1.6.2.0";
else audit(AUDIT_DEVICE_NOT_VULN, display_name, version);

if (ver_compare(ver:version, fix:fix) < 0)
{
  report =
    '\n  Name              : ' + display_name +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : ' + fix +
    '\n';
  security_report_v4(severity:SECURITY_WARNING, port:0, extra:report);
}
else audit(AUDIT_DEVICE_NOT_VULN, display_name, version);