PowerDNS Authoritative Server 3.4.x < 3.4.6 distributor.hh Packet Handling DoS

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

include("compat.inc");

if (description)
{
  script_id(86699);
  script_version("1.5");
  script_cvs_date("Date: 2018/11/15 20:50:21");

  script_cve_id("CVE-2015-5230");
  script_bugtraq_id(76638);

  script_name(english:"PowerDNS Authoritative Server 3.4.x < 3.4.6 distributor.hh Packet Handling DoS");
  script_summary(english:"Checks the PowerDNS Authoritative Server version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote DNS server is affected by a denial of service
vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the version of the
PowerDNS Authorative Server listening on the remote host is version
3.4.x prior to 3.4.6. It is, therefore, affected by a denial of
service vulnerability due to an unspecified flaw in
'pdns/distributor.hh' related to DNS packet parsing and generation. A
remote attacker can exploit this vulnerability, via crafted query
packets, to crash the server.

Note that Nessus has not attempted to exploit this issue but has
instead relied only on the application's self-reported version number.
Also, Nessus has not checked for the presence of the patch or the
workaround.");
  script_set_attribute(attribute:"see_also", value:"https://doc.powerdns.com/md/security/powerdns-advisory-2015-02/");
  # https://blog.powerdns.com/2015/09/02/powerdns-security-advisory-2015-02/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8a98b1c7");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PowerDNS Authoritative Server 3.4.6 or later.
Alternatively, apply the patch or workaround referenced in the vendor
advisory.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  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:"2015/09/02");
  script_set_attribute(attribute:"patch_publication_date",value:"2015/09/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/11/02");

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

  script_category(ACT_GATHER_INFO);

  script_copyright(english:"This script is Copyright (C) 2015-2018 Tenable Network Security, Inc.");

  script_family(english:"DNS");
  script_dependencies("pdns_version.nasl");
  script_require_keys("pdns/version_full", "pdns/version_source", "pdns/type", "Settings/ParanoidReport");

  exit(0);
}

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

app_name = "PowerDNS Authoritative Server";
version_source = get_kb_item_or_exit("pdns/version_source");
version = get_kb_item_or_exit("pdns/version_full");

fix = '3.4.6';
port = 53;

# Only the Authoritative Server is affected
type = get_kb_item_or_exit("pdns/type");
if (type != 'authoritative server') audit(AUDIT_NOT_LISTEN, app_name, port, "UDP");

if (version == UNKNOWN_VER) audit(AUDIT_UNKNOWN_APP_VER, app_name);
if (report_paranoia < 2) audit(AUDIT_PARANOID);

if (version !~ "^3\.4(\.[0-5])?($|[^0-9.])")
  audit(AUDIT_LISTEN_NOT_VULN, app_name, port, version, "UDP");

if (report_verbosity > 0)
{
  report =
    '\n  Version source    : ' + version_source +
    '\n  Installed version : ' + version +
    '\n  Fixed version     : ' + fix +
    '\n';
  security_hole(port:port, proto:"udp", extra:report);
}
else security_hole(port:port, proto:"udp");