F5 Networks BIG-IP : NTP vulnerability (K17517)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K17517.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(91313);
  script_version("2.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/22");

  script_cve_id("CVE-2015-7701");
  script_xref(name:"TRA", value:"TRA-2015-04");

  script_name(english:"F5 Networks BIG-IP : NTP vulnerability (K17517)");
  script_summary(english:"Checks the BIG-IP version.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote device is missing a vendor-supplied security patch."
  );
  script_set_attribute(
    attribute:"description",
    value:
"Memory leak in the CRYPTO_ASSOC function in ntpd in NTP 4.2.x before
4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to cause a
denial of service (memory consumption). (CVE-2015-7701)

Impact

An attacker could send packets to ntpd that may, after several days of
ongoing attack, cause it to run out of memory. There is no control
plane exposure in the BIG-IP system when you use a default
configuration, and this issue is exposed only when NTP is configured
to use the Autokey security protocol."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K17517"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.tenable.com/security/research/tra-2015-04"
  );
  script_set_attribute(
    attribute:"solution",
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K17517."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/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: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:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_advanced_firewall_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_acceleration_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_security_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_application_visibility_and_reporting");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_global_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_link_controller");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_policy_enforcement_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_wan_optimization_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_webaccelerator");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip_protocol_security_manager");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/08/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/11/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/05/25");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"F5 Networks Local Security Checks");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version", "Settings/ParanoidReport");

  exit(0);
}


include("f5_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
version = get_kb_item("Host/BIG-IP/version");
if ( ! version ) audit(AUDIT_OS_NOT, "F5 Networks BIG-IP");
if ( isnull(get_kb_item("Host/BIG-IP/hotfix")) ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/hotfix");
if ( ! get_kb_item("Host/BIG-IP/modules") ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/modules");

sol = "K17517";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("12.0.0","11.3.0-11.6.0");
vmatrix["AFM"]["unaffected"] = make_list("12.1.0","11.6.1");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("12.0.0","11.4.0-11.6.0");
vmatrix["AM"]["unaffected"] = make_list("12.1.0","11.6.1");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("12.0.0","11.0.0-11.6.0","10.1.0-10.2.4");
vmatrix["APM"]["unaffected"] = make_list("12.1.0","11.6.1");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("12.0.0","11.0.0-11.6.0","10.1.0-10.2.4");
vmatrix["ASM"]["unaffected"] = make_list("12.1.0","11.6.1");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("12.0.0","11.0.0-11.6.0");
vmatrix["AVR"]["unaffected"] = make_list("12.1.0","11.6.1");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("11.0.0-11.6.0","10.1.0-10.2.4");
vmatrix["GTM"]["unaffected"] = make_list("11.6.1");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("12.0.0","11.0.0-11.6.0","10.1.0-10.2.4");
vmatrix["LC"]["unaffected"] = make_list("12.1.0","11.6.1");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("12.0.0","11.0.0-11.6.0","10.1.0-10.2.4");
vmatrix["LTM"]["unaffected"] = make_list("12.1.0","11.6.1");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("12.0.0","11.3.0-11.6.0");
vmatrix["PEM"]["unaffected"] = make_list("12.1.0","11.6.1");


if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  if (report_verbosity > 0) security_warning(port:0, extra:bigip_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = bigip_get_tested_modules();
  audit_extra = "For BIG-IP module(s) " + tested + ",";
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, "running any of the affected modules");
}