3.5 Low
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
7.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
5.7 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
33.0%
The Microsoft SharePoint Server 2019 installation on the remote host is missing security updates. It is, therefore, affected by a Server Spoofing Vulnerability.
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#%NASL_MIN_LEVEL 70300
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(153389);
script_version("1.7");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/29");
script_cve_id("CVE-2021-38651");
script_xref(name:"MSKB", value:"5002018");
script_xref(name:"MSFT", value:"MS21-5002018");
script_xref(name:"IAVA", value:"2021-A-0424-S");
script_name(english:"Security Updates for Microsoft SharePoint Server 2019 (September 2021)");
script_set_attribute(attribute:"synopsis", value:
"The Microsoft SharePoint Server 2019 installation on the remote host is affected by a server spoofing vulnerability.");
script_set_attribute(attribute:"description", value:
"The Microsoft SharePoint Server 2019 installation on the remote host is missing security updates.
It is, therefore, affected by a Server Spoofing Vulnerability.
Note that Nessus has not tested for these issues 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/5002018");
script_set_attribute(attribute:"solution", value:
"Microsoft has released the following security updates to address these issues:
-KB5002018");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:P/A:N");
script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-38651");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/09/14");
script_set_attribute(attribute:"patch_publication_date", value:"2021/09/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/14");
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) 2021-2023 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');
get_kb_item_or_exit('SMB/MS_Bulletin_Checks/Possible');
var bulletin = 'MS21-09';
var app_name = 'Microsoft SharePoint Server';
var kbs = make_list(
'5002018'
);
if (get_kb_item('Host/patch_management_checks'))
hotfix_check_3rd_party(bulletin:bulletin, kbs:kbs, severity:SECURITY_NOTE);
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%.');
registry_init();
var install = get_single_install(app_name:app_name);
var kb_checks =
{
'2019':
{ '0':
{'Server':
[
{
'kb' : '5002018',
'path' : install['path'],
'append' : 'bin',
'file' : 'ascalc.dll',
'version' : '16.0.10378.20002',
'product_name' : 'Microsoft SharePoint Server 2019 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();
# grab the path otherwise
var check;
foreach var check (param_list)
{
if (!isnull(check['version']))
{
var path = check['path'];
if (!empty_or_null(check['append']))
var 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']
);
}
else
{
report = '\n';
if (check['product_name'])
report += ' Product : ' + check['product_name'] + '\n';
if (check['kb'])
report += ' KB : ' + check['kb'] + '\n';
hotfix_add_report(report, kb:check['kb']);
}
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_note();
hotfix_check_fversion_end();
exit(0);
}
else
{
hotfix_check_fversion_end();
audit(AUDIT_INST_VER_NOT_VULN, app_name);
}
Vendor | Product | Version | CPE |
---|---|---|---|
microsoft | sharepoint_server | cpe:/a:microsoft:sharepoint_server |
3.5 Low
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
SINGLE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:M/Au:S/C:N/I:P/A:N
7.6 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N
5.7 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
33.0%