Vulnerabilities > CVE-2020-5836 - Unspecified vulnerability in Symantec Endpoint Protection

047910
CVSS 7.8 - HIGH
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
local
low complexity
symantec
nessus

Summary

Symantec Endpoint Protection, prior to 14.3, can potentially reset the ACLs on a file as a limited user while Symantec Endpoint Protection's Tamper Protection feature is disabled.

Vulnerable Configurations

Part Description Count
Application
Symantec
223

Nessus

NASL familyWindows
NASL idSYMANTEC_ENDPOINT_PROT_CLIENT_SYM_17-062.NASL
descriptionThe version of Symantec Endpoint Protection (SEP) Client installed on the remote host is prior to 14.3. It is therefore affected by the following vulnerabilities: - An elevation of privilege vulnerability exists. An authenticated, local attacker can exploit this by resetting ACLs on a file as a limited user while the tamper feature is disabled, to gain elevated privileges. (CVE-2020-5836) - An elevation of privilege vulnerability exists. An authenticated, local attacker can exploit this by by writing to log files that are replaced by symbolic links to gain elevated privileges. (CVE-2020-5837) Note that Nessus has not tested for this issue but has instead relied only on the application
last seen2020-05-21
modified2020-05-15
plugin id136619
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/136619
titleSymantec Endpoint Protection Client < 14.3 Multiple Vulnerabilities (SYMSA1762)
code
#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(136619);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/18");

  script_cve_id("CVE-2020-5836", "CVE-2020-5837");
  script_xref(name:"IAVA", value:"2020-A-0210");

  script_name(english:"Symantec Endpoint Protection Client < 14.3 Multiple Vulnerabilities (SYMSA1762)");

  script_set_attribute(attribute:"synopsis", value:
"The version of Symantec Endpoint Protection Client installed on the remote host is affected by multiple 
vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of Symantec Endpoint Protection (SEP) Client installed on the remote host is prior to 14.3. It is therefore
affected by the following vulnerabilities:

  - An elevation of privilege vulnerability exists. An authenticated, local attacker can exploit this by
    resetting ACLs on a file as a limited user while the tamper feature is disabled, to gain elevated
    privileges. (CVE-2020-5836)

  - An elevation of privilege vulnerability exists. An authenticated, local attacker can exploit this by
    by writing to log files that are replaced by symbolic links to gain elevated privileges. (CVE-2020-5837)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://support.broadcom.com/security-advisory/security-advisory-detail.html?notificationId=SYMSA1762
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?54057529");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Symantec Endpoint Protection Client version 14.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/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: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:"cvss_score_source", value:"CVE-2020-5837");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/05/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/05/11");
  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:symantec:endpoint_protection");
  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("savce_installed.nasl");
  script_require_keys("Antivirus/SAVCE/version");
  script_require_ports(139, 445);

  exit(0);
}

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

app = 'Symantec Endpoint Protection Client';

display_ver = get_kb_item_or_exit('Antivirus/SAVCE/version');
edition = get_kb_item('Antivirus/SAVCE/edition');
if(get_kb_item('SMB/svc/ssSpnAv')) audit(AUDIT_INST_VER_NOT_VULN, "Symantec.cloud Endpoint Protection");

if (isnull(edition)) edition = '';
else if (edition == 'sepsb') app += ' Small Business Edition';

fixed_ver = 14.3.558.0000;

if (ver_compare(ver:display_ver, fix:fixed_ver, strict:FALSE) == -1)
{
  port = get_kb_item("SMB/transport");
  if (!port) port = 445;

  report =
    '\n  Product           : ' + app +
    '\n  Installed version : ' + display_ver +
    '\n  Fixed version     : ' + fixed_ver +
    '\n';
  security_report_v4(severity:SECURITY_WARNING, port:port, extra:report);
}
else audit(AUDIT_INST_VER_NOT_VULN, app, display_ver);