CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
96.9%
The Microsoft SharePoint Server 2016 installation on the remote host is missing language security updates. It is, therefore, affected by Microsoft SharePoint Spoofing Vulnerability (CVE-2021-24104)
Note that Nessus has not tested for this issue but has instead relied only on the application’s self-reported version number.
#
# (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(164177);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/06");
script_cve_id("CVE-2021-24104");
script_xref(name:"MSKB", value:"4493199");
script_xref(name:"MSFT", value:"MS21-4493199");
script_name(english:"Language Security Updates 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 language security updates. It is, therefore,
affected by Microsoft SharePoint Spoofing Vulnerability (CVE-2021-24104)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/en-us/help/4493199");
script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address this issue:
-KB4493199");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:N");
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:H/UI:N/S:C/C:L/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-24104");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
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:"2022/08/17");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:sharepoint_server:2016");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows : Microsoft Bulletins");
script_copyright(english:"This script is Copyright (C) 2021-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("microsoft_sharepoint_installed.nbin", "smb_language_detection.nasl");
script_require_keys("SMB/MS_Bulletin_Checks/Possible", "SMB/base_language_installs");
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');
get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
var bulletin = 'MS21-03';
var app_name = 'Microsoft SharePoint Server';
var kbs = make_list(
'4493199'
);
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);
var all_language_lists = get_kb_list('SMB/base_language_installs');
if (isnull(all_language_lists)) exit(1, 'Language File Scan Information not found');
all_language_lists = make_list(all_language_lists);
var item;
var language_lists = [];
if (!empty_or_null(all_language_lists))
{
foreach item (all_language_lists)
{
# English and Spanish (Mexico) contain an older version of wwintl.dll
if (item == "1033" || item == "2058") continue;
append_element(var:language_lists, value:item);
}
}
if (isnull(language_lists)) exit(1, 'No Affected Language Packs were found');
# Get path information for Windows.
var windir = hotfix_get_systemroot();
if (isnull(windir)) exit(1, 'Failed to determine the location of %windir%.');
registry_init();
var install = get_single_install(app_name:app_name);
var kb_checks =
{
'2016':
{ '0':
{'Server':
[
{
'kb' : '4493199',
'path' : install['path'],
'append' : 'webservices\\conversionservices\\*',
'file' : 'wwintl.dll',
'version' : '16.0.5134.1000',
'product_name' : 'Microsoft SharePoint Enterprise Server 2016'
}
]
}
}
};
# 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 check, path, path_list, are_we_vuln, report;
# grab the path otherwise
foreach check (param_list)
{
if (!isnull(check['version']))
{
path = check['path'];
path_list = hotfix_append_path(path:check['path'], value:check['append']);
path_list = language_pack_iterate(language_lists:language_lists, file_directory:path_list);
are_we_vuln = hotfix_check_fversion_multipath(
file_name:check['file'],
version:check['version'],
path_list:path_list,
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 if (!vuln)
{
hotfix_check_fversion_end();
audit(AUDIT_INST_VER_NOT_VULN, app_name);
}
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:N/C:P/I:P/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
AI Score
Confidence
High
EPSS
Percentile
96.9%