IBM DB2 10.5 < Fix Pack 7 Multiple Vulnerabilities (Linux) (Bar Mitzvah) (FREAK) (Logjam)

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

include('compat.inc');

if (description)
{
  script_id(87764);
  script_version("1.14");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");

  script_cve_id(
    "CVE-2015-0204",
    "CVE-2015-1788",
    "CVE-2015-1947",
    "CVE-2015-2808",
    "CVE-2015-4000"
  );
  script_bugtraq_id(
    71936,
    73684,
    74733,
    75158,
    79693
  );
  script_xref(name:"CERT", value:"243585");
  script_xref(name:"CEA-ID", value:"CEA-2021-0004");

  script_name(english:"IBM DB2 10.5 < Fix Pack 7 Multiple Vulnerabilities (Linux) (Bar Mitzvah) (FREAK) (Logjam)");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its version, the installation of IBM DB2 10.5 running on
the remote host is prior to Fix Pack 7. It is, therefore, affected by
the following vulnerabilities :

  - A security feature bypass vulnerability, known as FREAK
    (Factoring attack on RSA-EXPORT Keys), exists due to the
    support of weak EXPORT_RSA cipher suites with keys less
    than or equal to 512 bits. A man-in-the-middle attacker
    may be able to downgrade the SSL/TLS connection to use
    EXPORT_RSA cipher suites which can be factored in a
    short amount of time, allowing the attacker to intercept
    and decrypt the traffic. (CVE-2015-0204)

  - A denial of service vulnerability exists when processing
    an ECParameters structure due to an infinite loop that
    occurs when a specified curve is over a malformed binary
    polynomial field. A remote attacker can exploit this to
    perform a denial of service against any system that
    processes public keys, certificate requests, or
    certificates. This includes TLS clients and TLS servers
    with client authentication enabled. (CVE-2015-1788)

  - A privilege escalation vulnerability exists due to an
    untrusted search path flaw. A local attacker can exploit
    this, via a specially crafted library that is loaded by
    a setuid or setgid process, to gain elevated privileges
    on the system. (CVE-2015-1947)

  - A security feature bypass vulnerability exists, known as
    Bar Mitzvah, due to improper combination of state data
    with key data by the RC4 cipher algorithm during the
    initialization phase. A man-in-the-middle attacker can
    exploit this, via a brute-force attack using LSB values,
    to decrypt the traffic. (CVE-2015-2808)

  - A man-in-the-middle vulnerability, known as Logjam,
    exists due to a flaw in the SSL/TLS protocol. A remote
    attacker can exploit this flaw to downgrade connections
    using ephemeral Diffie-Hellman key exchange to 512-bit
    export-grade cryptography. (CVE-2015-4000)

Note that several of these vulnerabilities are due to the bundled
GSKit component and the embedded FCM 4.1 libraries.");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg21647054#7");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg1IT07394");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg1IT08753");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg1IT09900");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg1IT09964");
  script_set_attribute(attribute:"see_also", value:"https://www-01.ibm.com/support/docview.wss?uid=swg1IT09969");
  # https://www.blackhat.com/docs/asia-15/materials/asia-15-Mantin-Bar-Mitzvah-Attack-Breaking-SSL-With-13-Year-Old-RC4-Weakness-wp.pdf
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4bbf45ac");
  script_set_attribute(attribute:"see_also", value:"https://www.smacktls.com/#freak");
  script_set_attribute(attribute:"see_also", value:"https://weakdh.org/");
  script_set_attribute(attribute:"solution", value:
"Apply IBM DB2 version 10.5 Fix Pack 7 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:TF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:T/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2015-4000");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/01/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/30");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:ibm:db2");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Databases");

  script_copyright(english:"This script is Copyright (C) 2016-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("db2_installed.nbin");
  script_require_keys("installed_sw/DB2 Server");

  exit(0);
}

include('vcf_extras_db2.inc');

# The remote host's OS is Windows, not Linux.
if (get_kb_item('SMB/db2/Installed'))
  audit(AUDIT_OS_NOT, 'Linux', 'Windows');

var app_info = vcf::ibm_db2::get_app_info();
# DB2 has an optional OpenSSH server that will run on
# windows.  We need to exit out if we picked up the windows
# installation that way.
if ('Windows' >< app_info['platform'])
  audit(AUDIT_HOST_NOT, 'a Linux based operating system');

var constraints = [
   {'min_version':'10.5', 'fixed_version':'10.5.0.7'}
];

vcf::ibm_db2::check_version_and_report(
  app_info:app_info,
  constraints:constraints,
  severity:SECURITY_NOTE
);