OpenSSL 1.0.2b < 1.0.2o Vulnerability

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

include('compat.inc');

if (description)
{
  script_id(109945);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/07");

  script_cve_id("CVE-2018-0739");
  script_bugtraq_id(103518);

  script_name(english:"OpenSSL 1.0.2b < 1.0.2o Vulnerability");

  script_set_attribute(attribute:"synopsis", value:
"The remote service is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of OpenSSL installed on the remote host is prior to 1.0.2o. It is, therefore, affected by a vulnerability as
referenced in the 1.0.2o advisory.

  - Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually
    exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service
    attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is
    considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected
    1.0.2b-1.0.2n). (CVE-2018-0739)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=9310d45087ae546e27e61ddf8f6367f29848220d
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?481bda53");
  script_set_attribute(attribute:"see_also", value:"https://www.cve.org/CVERecord?id=CVE-2018-0739");
  script_set_attribute(attribute:"see_also", value:"https://www.openssl.org/news/secadv/20180327.txt");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OpenSSL version 1.0.2o or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:R/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-2018-0739");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/05/21");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:openssl:openssl");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2018-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("openssl_version.nasl", "openssl_nix_installed.nbin", "openssl_win_installed.nbin");
  script_require_keys("installed_sw/OpenSSL");

  exit(0);
}

include('vcf.inc');
include('vcf_extras_openssl.inc');

var app_info = vcf::combined_get_app_info(app:'OpenSSL');

vcf::check_all_backporting(app_info:app_info);

var constraints = [
  { 'min_version' : '1.0.2b', 'fixed_version' : '1.0.2o' }
];

vcf::openssl::check_version_and_report(
    app_info:app_info,
    constraints:constraints,
    severity:SECURITY_WARNING
);