F5 Networks BIG-IP : OpenSSL vulnerability (K23512141)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K23512141.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(94449);
  script_version("2.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/09");

  script_cve_id("CVE-2016-2179");

  script_name(english:"F5 Networks BIG-IP : OpenSSL vulnerability (K23512141)");
  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:
"The DTLS implementation in OpenSSL before 1.1.0 does not properly
restrict the lifetime of queue entries associated with unused
out-of-order messages, which allows remote attackers to cause a denial
of service (memory consumption) by maintaining many crafted DTLS
sessions simultaneously, related to d1_lib.c, statem_dtls.c,
statem_lib.c, and statem_srvr.c. (CVE-2016-2179)

Impact

An attacker can send a fragmented, incomplete message followed by a
'retransmission' message. In this case, the system accepts the
retransmission message but the queue retains the original fragments,
which consumes system resources. By repeating this process many times,
the attacker can cause resource exhaustion."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K23512141"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K23512141."
  );
  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:"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_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:"2016/09/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/10/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/11/01");
  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");

  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 = "K23512141";
vmatrix = make_array();

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["AFM"]["unaffected"] = make_list("11.4.0-11.4.1");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["AM"]["unaffected"] = make_list("11.4.0-11.4.1");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("11.2.1","10.2.1-10.2.4","12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["APM"]["unaffected"] = make_list("12.0.0-12.1.1","11.4.0-11.6.1","11.2.1-11.4.1","10.2.1-10.2.4");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("11.2.1","10.2.1-10.2.4","12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["ASM"]["unaffected"] = make_list("12.0.0-12.1.1","11.4.0-11.6.1","11.2.1-11.4.1","10.2.1-10.2.4");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("11.2.1","12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["AVR"]["unaffected"] = make_list("12.0.0-12.1.1","11.4.0-11.6.1","11.2.1-11.4.1");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("11.2.1","10.2.1-10.2.4","11.5.0-11.6.1");
vmatrix["GTM"]["unaffected"] = make_list("11.4.0-11.6.1","11.2.1-11.4.1","10.2.1-10.2.4");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("11.2.1","10.2.1-10.2.4","12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["LC"]["unaffected"] = make_list("12.0.0-12.1.1","11.4.0-11.6.1","11.2.1-11.4.1","10.2.1-10.2.4");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("11.2.1","10.2.1-10.2.4","12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["LTM"]["unaffected"] = make_list("12.0.0-12.1.1","11.4.0-11.6.1","11.2.1-11.4.1","10.2.1-10.2.4");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("12.0.0-12.1.1","11.5.0-11.6.1");
vmatrix["PEM"]["unaffected"] = make_list("11.4.0-11.4.1");

# PSM
vmatrix["PSM"] = make_array();
vmatrix["PSM"]["affected"  ] = make_list("11.2.1","10.2.1-10.2.4");
vmatrix["PSM"]["unaffected"] = make_list("11.4.0-11.4.1");


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");
}