The Microsoft SharePoint Server 2016 installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities:
A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges of another user. (CVE-2021-24104)
A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands. (CVE-2021-27076)
An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive information. (CVE-2021-27052)
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#
include('compat.inc');
if (description)
{
script_id(147751);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/08/17");
script_cve_id("CVE-2021-24104", "CVE-2021-27052", "CVE-2021-27076");
script_xref(name:"MSKB", value:"4493232");
script_xref(name:"MSFT", value:"MS21-4493232");
script_xref(name:"IAVA", value:"2021-A-0136-S");
script_name(english:"Security Updates for Microsoft Sharepoint 2016 (March 2021)");
script_set_attribute(attribute:"synopsis", value:
"The Microsoft SharePoint Server 2016 installation on the remote host is affected by multiple vulnerabilities.");
script_set_attribute(attribute:"description", value:
"The Microsoft SharePoint Server 2016 installation on the remote host is missing security updates. It is, therefore,
affected by multiple vulnerabilities:
- A session spoofing vulnerability exists. An attacker can exploit this to perform actions with the privileges
of another user. (CVE-2021-24104)
- A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute
unauthorized arbitrary commands. (CVE-2021-27076)
- An information disclosure vulnerability. An attacker can exploit this to disclose potentially sensitive
information. (CVE-2021-27052)");
script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4493232");
script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
-KB4493232");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:N/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-2021-27076");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/03/09");
script_set_attribute(attribute:"patch_publication_date", value:"2021/03/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/03/12");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint_server");
script_set_attribute(attribute:"stig_severity", value:"I");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows : Microsoft Bulletins");
script_copyright(english:"This script is Copyright (C) 2021-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("microsoft_sharepoint_installed.nbin", "smb_hotfixes.nasl", "ms_bulletin_checks_possible.nasl");
script_require_keys("SMB/MS_Bulletin_Checks/Possible");
script_require_ports(139, 445, "Host/patch_management_checks");
exit(0);
}
include('smb_func.inc');
include('smb_hotfixes.inc');
include('smb_hotfixes_fcheck.inc');
include('smb_reg_query.inc');
include('install_func.inc');
include('debug.inc');
get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
var bulletin = 'MS21-03';
var app_name = 'Microsoft SharePoint Server';
var kbs = make_list(
'4493232'
);
if (get_kb_item('Host/patch_management_checks'))
hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_WARNING);
get_kb_item_or_exit('SMB/Registry/Enumerated', exit_code:1);
# Get path information for Windows.
var windir = hotfix_get_systemroot();
if (isnull(windir)) exit(1, 'Failed to determine the location of %windir%.');
var paranoid_audit = FALSE;
registry_init();
var install = get_single_install(app_name:app_name);
var kb_checks =
{
'2016':
{ '0':
{'Server':
[
{
'kb' : '4493232',
'path' : hotfix_get_commonfilesdir(),
'append' : 'microsoft shared\\server16\\server setup controller',
'file' : 'wsssetup.dll',
'version' : '16.0.5134.1001',
'product_name' : 'Microsoft SharePoint Foundation 2016 Core'
}
]
}
}
};
# Get the specific product / path
var param_list = kb_checks[install['Product']][install['SP']][install['Edition']];
# audit if not affected
if(isnull(param_list)) audit(AUDIT_HOST_NOT, 'affected');
var port = kb_smb_transport();
var reg_keys = get_kb_list('SMB/Registry/HKLM/SOFTWARE/Microsoft/Windows/CurrentVersion/Uninstall/*/DisplayName');
# grab the path otherwise
var check, are_we_vuln, display_name, paranoid_audit, report, path;
foreach check (param_list)
{
if (!isnull(check['version']))
{
path = check['path'];
if (!empty_or_null(check['append']))
path = hotfix_append_path(path:check['path'], value:check['append']);
are_we_vuln = hotfix_check_fversion(
file:check['file'],
version:check['version'],
path:path,
kb:check['kb'],
product:check['product_name']
);
}
if(are_we_vuln == HCF_OLDER) vuln = TRUE;
}
if (vuln)
{
port = kb_smb_transport();
replace_kb_item(name:'SMB/Missing/'+bulletin, value:TRUE);
hotfix_security_warning();
hotfix_check_fversion_end();
exit(0);
}
else
{
hotfix_check_fversion_end();
if (paranoid_audit == TRUE) audit(AUDIT_POTENTIAL_VULN, app_name);
audit(AUDIT_INST_VER_NOT_VULN, app_name);
}
Vendor | Product | Version | CPE |
---|---|---|---|
microsoft | sharepoint_server | cpe:/a:microsoft:sharepoint_server |