ISC BIND 9 < 9.9.9-P6 / 9.9.9-S8 / 9.10.4-P6 / 9.11.0-P3 DNS64 and RPZ DoS

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

include("compat.inc");

if (description)
{
  script_id(97227);
  script_version("1.7");
  script_cvs_date("Date: 2019/11/13");

  script_cve_id("CVE-2017-3135");

  script_name(english:"ISC BIND 9 < 9.9.9-P6 / 9.9.9-S8 / 9.10.4-P6 / 9.11.0-P3 DNS64 and RPZ DoS");
  script_summary(english:"Checks the version of BIND.");

  script_set_attribute(attribute:"synopsis", value:
"The remote name server is affected by a denial of service
vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the instance of ISC
BIND 9 running on the remote name server is 9.8.8 or 9.9.x prior to
9.9.9-P6 or 9.9.9-S8, 9.10.x prior to 9.10.4-P6, or 9.11.x prior to
9.11.0-P3. It is, therefore, affected by a denial of service
vulnerability in the query_find() function in query.c that is
triggered when using DNS64 and RPZ simultaneously for rewriting query
responses. An unauthenticated, remote attacker can exploit this to
cause an INSIST assertion failure or a NULL pointer read, resulting in
a termination of the service.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"https://kb.isc.org/article/AA-01453");
  script_set_attribute(attribute:"solution", value:
"Upgrade to ISC BIND version 9.9.9-P6 / 9.9.9-S8 / 9.10.4-P6 /
9.11.0-P3 or later. Alternatively, remove either DNS64 or RPZ from the
configuration.");
  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:H/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-2017-3135");

  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:"2017/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/08");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/02/17");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:isc:bind");
  script_end_attributes();

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

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

  script_dependencies("bind_version.nasl");
  script_require_keys("bind/version", "Settings/ParanoidReport");

  exit(0);
}

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

ver = get_kb_item_or_exit("bind/version");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

if (
  # 9.8.8
  ver == "9.8.8" ||

  # 9.9.3 - 9.9.8
  ver =~ "^9\.9\.[3-8]($|[^0-9])" ||

  # 9.9.9 <= 9.9.9-P5/9.9.9-S7
  ver =~ "^9\.9\.9((([ab]|beta|rc)[0-9]*)|(-P[0-5])|(-S[0-7]))?$" ||

  # 9.9.10b1
  ver == "9.9.10b1" ||

  # 9.10.x <= 9.10.4-P5
  ver =~ "^9\.10\.[0-3]($|[^0-9])" ||
  ver =~ "^9\.10\.4((([ab]|beta|rc)[0-9]*)|(-P[0-5]))?$" ||

  # 9.10.5b1
  ver == "9.10.5b1" ||

  # 9.11.0.x <= 9.11.0-P2
  ver =~ "^9\.11\.0((([ab]|beta|rc)[0-9]*)|(-P[0-2]))?$"
)
{
  items = make_array(
    "Installed version", ver,
    "Fixed version", "9.9.9-P6 / 9.9.9-S8 / 9.10.4-P6 / 9.11.0-P3"
  );
  order = make_list("Installed version", "Fixed version");
  security_report_v4(
    severity:SECURITY_WARNING,
    port:53,
    proto:"udp",
    extra:report_items_str(
      report_items:items,
      ordered_fields:order
    )
  );
}
else audit(AUDIT_LISTEN_NOT_VULN, "BIND", 53, ver, "UDP");