Lenovo System Update < 5.06.0034 Multiple Vulnerabilities - Nessus

High   Plugin ID: 83736

This page contains detailed information about the Lenovo System Update < 5.06.0034 Multiple Vulnerabilities Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

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Plugin Overview

ID: 83736
Name: Lenovo System Update < 5.06.0034 Multiple Vulnerabilities
Filename: lenovo_su_5_6_0_34.nasl
Vulnerability Published: 2015-04-14
This Plugin Published: 2015-05-21
Last Modification Time: 2018-07-12
Plugin Version: 1.6
Plugin Type: local
Plugin Family: Windows
Dependencies: lenovo_su_detection.nbin
Required KB Items [?]: installed_sw/Lenovo System Update

Vulnerability Information

Severity: High
Vulnerability Published: 2015-04-14
Patch Published: 2015-04-14
CVE [?]: CVE-2015-2219, CVE-2015-2233, CVE-2015-2234
CPE [?]: cpe:/a:lenovo:system_update
Exploited by Malware: True

Synopsis

The remote Windows host contains an application that is affected by multiple vulnerabilities.

Description

The version of Lenovo System Update installed on the remote host is prior to 5.06.0034. It is, therefore, affected by the following vulnerabilities :

- A flaw exists in SUService.exe (System Update service) due to generating security tokens for a named pipe in a predictable manner. A local attacker, by sending a valid token, can exploit this flaw to execute commands to gain elevated privileges. (CVE-2015-2219)

- A flaw exists due to a failure to properly validate the certificate authority chain when downloading updates. A man-in-the-middle attacker, using a crafted certificate, can exploit this flaw to inject malicious updates, thereby allowing the execution of arbitrary files. (CVE-2015-2233)

- A flaw exists due to signature validation for updates occurring in a directory having world-writeable permissions. This can allow a local attacker to swap the update before it is installed and thereby gain elevated privileges. (CVE-2015-2234)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Lenovo System Update 5.06.0034 or later.

Public Exploits

Target Network Port(s): N/A
Target Asset(s): N/A
Exploit Available: True (Metasploit Framework, Exploit-DB)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Lenovo System Update < 5.06.0034 Multiple Vulnerabilities vulnerability:

  1. Metasploit: exploit/windows/local/lenovo_systemupdate
    [Lenovo System Update Privilege Escalation]
  2. Exploit-DB: exploits/windows/local/41708.rb
    [EDB-41708: Lenovo System Update - Local Privilege Escalation (Metasploit)]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

WARNING: Beware of using unverified exploits from sources such as GitHub or Exploit-DB. These exploits and PoCs could contain malware. For more information, see how to use exploits safely.

Risk Information

CVSS V2 Vector [?]: AV:A/AC:L/Au:N/C:C/I:C/A:C/E:H/RL:OF/RC:C
CVSS Base Score:8.3 (High)
Impact Subscore:10.0
Exploitability Subscore:6.5
CVSS Temporal Score:7.2 (High)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:7.2 (High)

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Plugin Source

This is the lenovo_su_5_6_0_34.nasl nessus plugin source code. This script is Copyright (C) 2015-2018 Tenable Network Security, Inc. 

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

include("compat.inc");

if (description)
{
  script_id(83736);
  script_version("1.6");
  script_cvs_date("Date: 2018/07/12 19:01:17");

  script_cve_id("CVE-2015-2219", "CVE-2015-2233", "CVE-2015-2234");
  script_bugtraq_id(74634, 74642, 74649);

  script_name(english:"Lenovo System Update < 5.06.0034 Multiple Vulnerabilities");
  script_summary(english:"Checks the file version of Lenovo System Update.");

  script_set_attribute(attribute:"synopsis", value:
"The remote Windows host contains an application that is affected by
multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Lenovo System Update installed on the remote host is
prior to 5.06.0034. It is, therefore, affected by the following
vulnerabilities :

  - A flaw exists in SUService.exe (System Update service)
    due to generating security tokens for a named pipe in a
    predictable manner. A local attacker, by sending a valid
    token, can exploit this flaw to execute commands to gain
    elevated privileges. (CVE-2015-2219)

  - A flaw exists due to a failure to properly validate the
    certificate authority chain when downloading updates. A
    man-in-the-middle attacker, using a crafted certificate,
    can exploit this flaw to inject malicious updates,
    thereby allowing the execution of arbitrary files.
    (CVE-2015-2233)

  - A flaw exists due to signature validation for updates
    occurring in a directory having world-writeable
    permissions. This can allow a local attacker to swap the
    update before it is installed and thereby gain elevated
    privileges. (CVE-2015-2234)

Note that Nessus has not tested for these issues but has instead
relied only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"https://support.lenovo.com/us/en/product_security/lsu_privilege");
  script_set_attribute(attribute:"solution", value:"Upgrade to Lenovo System Update 5.06.0034 or later.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:H/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:"exploited_by_malware", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'Lenovo System Update Privilege Escalation');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/04/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/05/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:lenovo:system_update");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Windows");

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

  script_dependencies("lenovo_su_detection.nbin");
  script_require_keys("installed_sw/Lenovo System Update");

  exit(0);
}

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

app = "Lenovo System Update";

install = get_single_install(app_name: app, exit_if_unknown_ver: TRUE);

path = install['path'];
version = install['version'];

fix = "5.6.0.34";

# Versions < 5.6.0.34 are vulnerable.
if (ver_compare(ver: version, fix: fix, strict:FALSE) < 0)
{
  port = get_kb_item("SMB/transport");
  if (!port) port = 445;

  if (report_verbosity > 0)
  {
    productname = get_kb_item("SMB/ProductName");

    report =
      '\n  Path              : ' + path +
      '\n  Installed version : ' + version;

    if ( "XP" >< productname || "Vista" >< productname)
    {
      report +=
        '\n' +
        '\n  Lenovo System Update is no longer supported on Windows XP and Windows Vista hosts.' +
        '\n  Please refer to the vendor advisory for more information.' +
        '\n';
    }
    else
    {
      report +=
        '\n  Fixed version     : ' + fix +
        '\n';
    }
    security_hole(port:port, extra:report);
  }
  else security_hole(port);
}
else audit(AUDIT_INST_PATH_NOT_VULN, app, version, path);

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/lenovo_su_5_6_0_34.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\lenovo_su_5_6_0_34.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/lenovo_su_5_6_0_34.nasl

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How to Run

Here is how to run the Lenovo System Update < 5.06.0034 Multiple Vulnerabilities as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Windows plugin family.
  6. On the right side table select Lenovo System Update < 5.06.0034 Multiple Vulnerabilities plugin ID 83736.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl lenovo_su_5_6_0_34.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a lenovo_su_5_6_0_34.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - lenovo_su_5_6_0_34.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state lenovo_su_5_6_0_34.nasl -t <IP/HOST>

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References

BID | SecurityFocus Bugtraq ID: See also: Similar and related Nessus plugins:
  • 58654 - Lenovo ThinkManagement Console RunAMTCommand Operation -PutUpdateFileCore Command Parsing Arbitrary File Upload

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file lenovo_su_5_6_0_34.nasl version 1.6. For more plugins, visit the Nessus Plugin Library.

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