Vulnerabilities > CVE-2020-7266 - Improper Privilege Management vulnerability in Mcafee Virusscan Enterprise 1.9.0/1.9.1/2.0.0

047910
CVSS 8.4 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
mcafee
CWE-269
nessus
NVD
Published: 2020-05-08
Updated: 2024-11-21

Summary

Privilege Escalation vulnerability in McAfee VirusScan Enterprise (VSE) for Windows prior to 8.8 Patch 14 Hotfix 116778 allows local users to delete files the user would otherwise not have access to via manipulating symbolic links to redirect a McAfee delete action to an unintended file. This is achieved through running a malicious script or program on the target machine.

Vulnerable Configurations

Part Description Count
Application
Mcafee
3

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • 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.

Nessus

NASL familyWindows
NASL idMCAFEE_VSE_SB10316.NASL
descriptionThe version of McAfee VirusScan Enterprise (VSE) installed on the remote Windows host is prior to 8.8 Patch 14. It is, therefore, affected by a privilege escalation vulnerability.
last seen2020-05-21
modified2020-05-15
plugin id136668
published2020-05-15
reporterThis script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/136668
titleMcAfee VirusScan Enterprise < 8.8 Patch 14 Privilege Escalation Vulnerability (SB10316)
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136668);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/07/02");

  script_cve_id("CVE-2020-7266");
  script_xref(name:"MCAFEE-SB", value:"SB10316");
  script_xref(name:"IAVA", value:"2020-A-0202");

  script_name(english:"McAfee VirusScan Enterprise < 8.8 Patch 14 Hotfix 116778 Privilege Escalation Vulnerability (SB10316)");

  script_set_attribute(attribute:"synopsis", value:
"The antivirus application installed on the remote Windows host is
affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of McAfee VirusScan Enterprise (VSE) installed on the
remote Windows host is prior to 8.8 Patch 14 Hotfix 116778. It is,
therefore, affected by a privilege escalation vulnerability.");
  script_set_attribute(attribute:"see_also", value:"https://kc.mcafee.com/corporate/index?page=content&id=SB10316");
  script_set_attribute(attribute:"solution", value:
"Upgrade to McAfee VirusScan Enterprise version 8.8 Patch 14 Hotfix 116778.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-7266");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/04/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/04/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/05/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:mcafee:virusscan_enterprise");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("mcafee_installed.nasl");
  script_require_keys("Antivirus/McAfee/installed");
  script_require_ports(139, 445);

  exit(0);
}

include('misc_func.inc');
include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');

get_kb_item_or_exit('Antivirus/McAfee/installed');

product_name = get_kb_item_or_exit('Antivirus/McAfee/product_name');
product_version = get_kb_item_or_exit('Antivirus/McAfee/product_version');
product_path = get_kb_item_or_exit('Antivirus/McAfee/product_path');

app = 'McAfee VirusScan Enterprise';

if (app >!< product_name)
  audit(AUDIT_INST_VER_NOT_VULN, product_name);

if (product_version !~ '^8\\.8\\.')
  audit(AUDIT_INST_VER_NOT_VULN, product_name, product_version);

patch_14_fix = '8.8.0.2190'; # 8.8 Patch 14 product version
hotpatch_fix = '20.3.0.179'; # Hotfix 116778 mfeann.exe

exe = product_path + 'mfeann.exe';
ver = hotfix_get_fversion(path:exe);

hotfix_handle_error(error_code:ver['error'], file:exe, appname:app, exit_on_fail:TRUE);
hotfix_check_fversion_end();

hotpatch_version = join(sep:'.', ver['value']);

# hotpatch file is vulnerable
if (ver_compare(ver:hotpatch_version, fix:hotpatch_fix, strict:FALSE) < 0)
{
  port = get_kb_item('SMB/transport');
  if (isnull(port)) port = 445;

  report = '  Installed version : ' + product_version + '\n'
         + '  Fixed version     : ' + patch_14_fix + ' (8.8 Patch 14 with Hotfix 116778)' + '\n';

  security_report_v4(extra:report, port:port, severity:SECURITY_NOTE);
}
else audit(AUDIT_INST_VER_NOT_VULN, product_name, product_version);

References