Vulnerabilities > CVE-2016-5745 - Improper Access Control vulnerability in F5 Big-Ip Local Traffic Manager

047910
CVSS 10.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
f5
CWE-284
critical
nessus
NVD
Published: 2016-10-05
Updated: 2016-11-28

Summary

F5 BIG-IP LTM systems 11.x before 11.2.1 HF16, 11.3.x, 11.4.x before 11.4.1 HF11, 11.5.0, 11.5.1 before HF11, 11.5.2, 11.5.3, 11.5.4 before HF2, 11.6.0 before HF8, 11.6.1 before HF1, 12.0.0 before HF4, and 12.1.0 before HF2 allow remote attackers to modify or extract system configuration files via vectors involving NAT64.

Vulnerable Configurations

Part Description Count
Application
F5
16

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.

Nessus

NASL familyF5 Networks Local Security Checks
NASL idF5_BIGIP_SOL64743453.NASL
descriptionBIG-IP devices using NAT64 are vulnerable to an unauthenticated remote attack that may allow modification of the BIG-IP system configuration. (CVE-2016-5745) F5 Technical Support has no additional information about this issue.
last seen2020-06-01
modified2020-06-02
plugin id93840
published2016-10-04
reporterThis script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/93840
titleF5 Networks BIG-IP : NAT64 vulnerability (K64743453)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K64743453.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(93840);
  script_version("2.9");
  script_cvs_date("Date: 2019/01/04 10:03:40");

  script_cve_id("CVE-2016-5745");

  script_name(english:"F5 Networks BIG-IP : NAT64 vulnerability (K64743453)");
  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:
"BIG-IP devices using NAT64 are vulnerable to an unauthenticated remote
attack that may allow modification of the BIG-IP system configuration.
(CVE-2016-5745)

F5 Technical Support has no additional information about this issue."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K64743453"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K64743453."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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:H/I:H/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_local_traffic_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");

  script_set_attribute(attribute:"patch_publication_date", value:"2016/09/28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/10/04");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2019 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 = "K64743453";
vmatrix = make_array();

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("12.1.0-12.1.0HF1","12.0.0-12.0.0HF3","11.6.1","11.6.0-11.6.0HF7","11.5.2-11.5.4HF1","11.5.0-11.5.1HF10","11.3.0-11.4.1HF10","11.0.0-11.2.1HF15");
vmatrix["LTM"]["unaffected"] = make_list("13.0.0","12.1.1-12.1.2","12.1.0HF2","12.0.0HF4","11.6.1HF1","11.6.0HF8","11.5.4HF2","11.5.1HF11","11.4.1HF11","11.2.1HF16","10.2.1-10.2.4");


if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  if (report_verbosity > 0) security_hole(port:0, extra:bigip_report_get());
  else security_hole(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 the affected module LTM");
}

References