Vulnerabilities > CVE-2020-7267 - Improper Privilege Management vulnerability in Mcafee Virusscan Enterprise 8.8

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: 2023-11-07

Summary

Privilege Escalation vulnerability in McAfee VirusScan Enterprise (VSE) for Linux prior to 2.0.3 Hotfix 2635000 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
14

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 familyMisc.
NASL idMCAFEE_VSEL_SB10316.NASL
descriptionThe remote host has a version of McAfee VirusScan Enterprise for Linux (VSEL) installed that is prior or equal to 2.0.3. It is, therefore, affected by a privilege escalation vulnerability which allows a malicious attacker the ability to delete files they do not have access to.
last seen2020-05-21
modified2020-05-15
plugin id136666
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/136666
titleMcAfee VirusScan Enterprise for Linux <= 2.0.3 Multiple vulnerabilities (SB10316)
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136666);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/19");

  script_cve_id("CVE-2020-7267");
  script_xref(name:"MCAFEE-SB", value:"SB10316");
  script_xref(name:"IAVA", value:"2020-A-0202");

  script_name(english:"McAfee VirusScan Enterprise for Linux <= 2.0.3 Multiple vulnerabilities (SB10316)");
  script_summary(english:"Checks VSEL version");

  script_set_attribute(attribute:"synopsis", value:
"The remote host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The remote host has a version of McAfee VirusScan Enterprise for Linux
(VSEL) installed that is prior or equal to 2.0.3. It is, therefore,
affected by a privilege escalation vulnerability which allows
a malicious attacker the ability to delete files they do not have access to.");
  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 VSEL 2.0.3 Security Hotfix 2635000 or VSEL 1.9.2 Security Hotfix 2637000");
  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-2020-7267");

  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:"Misc.");

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

  script_dependencies("mcafee_vsel_detect.nbin");
  script_require_keys("installed_sw/McAfee VirusScan Enterprise for Linux");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("install_func.inc");
include("ssh_func.inc");
include("telnet_func.inc");
include("hostlevel_funcs.inc");

if ( islocalhost() )
{
  port = 0;
  if ( ! defined_func("pread") ) exit(1, "'pread()' is not defined.");
    info_t = INFO_LOCAL;
}
else
{
  port = kb_ssh_transport();
  if (!get_port_state(port)) audit(AUDIT_PORT_CLOSED, port);

  ret = ssh_open_connection();
  if (!ret) audit(AUDIT_FN_FAIL, "ssh_open_connection()");

    info_t = INFO_SSH;
}

app_name = "McAfee VirusScan Enterprise for Linux";
get_install_count(app_name:app_name, exit_if_zero:TRUE);

install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE);
version = install['version'];
vuln = FALSE;

if (ver_compare(ver:version, fix:"2.0.3.29216", strict:FALSE) < 0 && version =~ "^2\.0\.3") vuln = TRUE;
else if (ver_compare(ver:version, fix:"1.9.2.29197", strict:FALSE) < 0 && version =~ "^1\.9\.2") vuln = TRUE;

if (vuln)
{
  port = 0;
  report ='\nInstalled version : ' + version +
          '\nSolution          : Upgrade to McAfee VirusScan Enterprise (VSE) for Linux 1.9.2 Hotfix 2637000, 2.0.3 Hotfix 2635000, or later.\n';
  security_report_v4(severity:SECURITY_NOTE, extra:report, port:port, xss:TRUE, sqli:TRUE, xsrf:TRUE);
}
else audit(AUDIT_INST_VER_NOT_VULN, version);

References