Vulnerabilities > CVE-2015-3628 - Permissions, Privileges, and Access Controls vulnerability in F5 products

047910
CVSS 9.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
SINGLE
Confidentiality impact
COMPLETE
Integrity impact
COMPLETE
Availability impact
COMPLETE
network
low complexity
f5
CWE-264
critical
nessus
exploit available
metasploit
NVD
Published: 2015-12-07
Updated: 2019-06-06

Summary

The iControl API in F5 BIG-IP LTM, AFM, Analytics, APM, ASM, Link Controller, and PEM 11.3.0 before 11.5.3 HF2 and 11.6.0 before 11.6.0 HF6, BIG-IP AAM 11.4.0 before 11.5.3 HF2 and 11.6.0 before 11.6.0 HF6, BIG-IP Edge Gateway, WebAccelerator, and WOM 11.3.0, BIG-IP GTM 11.3.0 before 11.6.0 HF6, BIG-IP PSM 11.3.0 through 11.4.1, Enterprise Manager 3.1.0 through 3.1.1, BIG-IQ Cloud and Security 4.0.0 through 4.5.0, BIG-IQ Device 4.2.0 through 4.5.0, and BIG-IQ ADC 4.5.0 allows remote authenticated users with the "Resource Administrator" role to gain privileges via an iCall (1) script or (2) handler in a SOAP request to iControl/iControlPortal.cgi.

Vulnerable Configurations

Part Description Count
Application
F5
97

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Accessing, Modifying or Executing Executable Files
    An attack of this type exploits a system's configuration that allows an attacker to either directly access an executable file, for example through shell access; or in a possible worst case allows an attacker to upload a file and then execute it. Web servers, ftp servers, and message oriented middleware systems which have many integration points are particularly vulnerable, because both the programmers and the administrators must be in synch regarding the interfaces and the correct privileges for each interface.
  • Leverage Executable Code in Non-Executable Files
    An attack of this type exploits a system's trust in configuration and resource files, when the executable loads the resource (such as an image file or configuration file) the attacker has modified the file to either execute malicious code directly or manipulate the target process (e.g. application server) to execute based on the malicious configuration parameters. Since systems are increasingly interrelated mashing up resources from local and remote sources the possibility of this attack occurring is high. The attack can be directed at a client system, such as causing buffer overrun through loading seemingly benign image files, as in Microsoft Security Bulletin MS04-028 where specially crafted JPEG files could cause a buffer overrun once loaded into the browser. Another example targets clients reading pdf files. In this case the attacker simply appends javascript to the end of a legitimate url for a pdf (http://www.gnucitizen.org/blog/danger-danger-danger/) http://path/to/pdf/file.pdf#whatever_name_you_want=javascript:your_code_here The client assumes that they are reading a pdf, but the attacker has modified the resource and loaded executable javascript into the client's browser process. The attack can also target server processes. The attacker edits the resource or configuration file, for example a web.xml file used to configure security permissions for a J2EE app server, adding role name "public" grants all users with the public role the ability to use the administration functionality. The server trusts its configuration file to be correct, but when they are manipulated, the attacker gains full control.
  • Blue Boxing
    This type of attack against older telephone switches and trunks has been around for decades. A tone is sent by an adversary to impersonate a supervisor signal which has the effect of rerouting or usurping command of the line. While the US infrastructure proper may not contain widespread vulnerabilities to this type of attack, many companies are connected globally through call centers and business process outsourcing. These international systems may be operated in countries which have not upgraded Telco infrastructure and so are vulnerable to Blue boxing. Blue boxing is a result of failure on the part of the system to enforce strong authorization for administrative functions. While the infrastructure is different than standard current applications like web applications, there are historical lessons to be learned to upgrade the access control for administrative functions.
  • Restful Privilege Elevation
    Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
  • Target Programs with Elevated Privileges
    This attack targets programs running with elevated privileges. The attacker would try to leverage a bug in the running program and get arbitrary code to execute with elevated privileges. For instance an attacker would look for programs that write to the system directories or registry keys (such as HKLM, which stores a number of critical Windows environment variables). These programs are typically running with elevated privileges and have usually not been designed with security in mind. Such programs are excellent exploit targets because they yield lots of power when they break. The malicious user try to execute its code at the same level as a privileged system call.

Exploit-Db

descriptionF5 iControl iCall::Script Root Command Execution. CVE-2015-3628. Remote exploit for hardware platform
fileexploits/hardware/remote/38764.rb
idEDB-ID:38764
last seen2016-02-04
modified2015-11-19
platformhardware
port443
published2015-11-19
reportermetasploit
sourcehttps://www.exploit-db.com/download/38764/
titleF5 iControl iCall::Script Root Command Execution
typeremote

Metasploit

descriptionThis module exploits an authenticated privilege escalation vulnerability in the iControl API on the F5 BIG-IP LTM (and likely other F5 devices). This requires valid credentials and the Resource Administrator role. The exploit should work on BIG-IP 11.3.0 \- 11.6.0, (11.5.x < 11.5.3 HF2 or 11.6.x < 11.6.0 HF6, see references for more details)
idMSF:EXPLOIT/LINUX/HTTP/F5_ICALL_CMD
last seen2020-06-01
modified2017-07-24
published2015-11-09
references
reporterRapid7
sourcehttps://github.com/rapid7/metasploit-framework/blob/master//modules/exploits/linux/http/f5_icall_cmd.rb
titleF5 iControl iCall::Script Root Command Execution

Nessus

NASL familyF5 Networks Local Security Checks
NASL idF5_BIGIP_SOL16728.NASL
descriptionAn authenticated user, with Resource Administrator role permissions, is able to use iCall scripts and associated handlers to create and modify user account properties. (CVE-2015-3628)
last seen2020-03-17
modified2015-09-04
plugin id85771
published2015-09-04
reporterThis script is Copyright (C) 2015-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/85771
titleF5 Networks BIG-IP : iCall privilege escalation vulnerability (K16728)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K16728.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(85771);
  script_version("1.15");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/09");

  script_cve_id("CVE-2015-3628");

  script_name(english:"F5 Networks BIG-IP : iCall privilege escalation vulnerability (K16728)");
  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:
"An authenticated user, with Resource Administrator role permissions,
is able to use iCall scripts and associated handlers to create and
modify user account properties. (CVE-2015-3628)"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K16728"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K16728."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'F5 iControl iCall::Script Root Command Execution');
  script_set_attribute(attribute:"exploit_framework_metasploit", 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:"2015/12/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/09/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/09/04");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2020 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 = "K16728";
vmatrix = make_array();

# AFM
vmatrix["AFM"] = make_array();
vmatrix["AFM"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["AFM"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10");

# AM
vmatrix["AM"] = make_array();
vmatrix["AM"]["affected"  ] = make_list("11.6.0","11.4.0-11.5.3");
vmatrix["AM"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10");

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["APM"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10","11.0.0-11.2.1","10.1.0-10.2.4");

# ASM
vmatrix["ASM"] = make_array();
vmatrix["ASM"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["ASM"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10","11.0.0-11.2.1","10.0.0-10.2.4");

# AVR
vmatrix["AVR"] = make_array();
vmatrix["AVR"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["AVR"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10","11.0.0-11.2.1");

# GTM
vmatrix["GTM"] = make_array();
vmatrix["GTM"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["GTM"]["unaffected"] = make_list("11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10","11.0.0-11.2.1","10.0.0-10.2.4");

# LC
vmatrix["LC"] = make_array();
vmatrix["LC"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["LC"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10","11.0.0-11.2.1","10.0.0-10.2.4");

# LTM
vmatrix["LTM"] = make_array();
vmatrix["LTM"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["LTM"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10","11.0.0-11.2.1","10.0.0-10.2.4");

# PEM
vmatrix["PEM"] = make_array();
vmatrix["PEM"]["affected"  ] = make_list("11.6.0","11.3.0-11.5.3");
vmatrix["PEM"]["unaffected"] = make_list("12.0.0","11.6.0HF6","11.5.4","11.5.3HF2","11.4.1HF10");

# PSM
vmatrix["PSM"] = make_array();
vmatrix["PSM"]["affected"  ] = make_list("11.3.0-11.4.1");
vmatrix["PSM"]["unaffected"] = make_list("11.4.1HF10","11.0.0-11.2.1","10.0.0-10.2.4");

# WAM
vmatrix["WAM"] = make_array();
vmatrix["WAM"]["affected"  ] = make_list("11.3.0");
vmatrix["WAM"]["unaffected"] = make_list("11.0.0-11.2.1","10.0.0-10.2.4");

# WOM
vmatrix["WOM"] = make_array();
vmatrix["WOM"]["affected"  ] = make_list("11.3.0");
vmatrix["WOM"]["unaffected"] = make_list("11.0.0-11.2.1","10.0.0-10.2.4");


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 any of the affected modules");
}

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/134434/f5_icall_cmd.rb.txt
idPACKETSTORM:134434
last seen2016-12-05
published2015-11-19
reporterJon Hart
sourcehttps://packetstormsecurity.com/files/134434/F5-iControl-iCall-Script-Root-Command-Execution.html
titleF5 iControl iCall::Script Root Command Execution

References