CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
98.4%
The version of Microsoft .NET 7 Core installed on the remote host is prior to 7.0.12. It is, therefore, affected by multiple vulnerabilities as referenced in the 2023_Oct_10 advisory.
A vulnerability exists in the ASP.NET Core Kestrel web server where a malicious client may flood the server with specially crafted HTTP/2 requests, causing denial of service. (CVE-2023-44487)
A null pointer vulnerability exists in MsQuic.dll which may lead to Denial of Service. This issue only affects Windows systems. (CVE-2023-38171)
A memory leak vulnerability exists in MsQuic.dll which may lead to Denial of Service. This issue only affects Windows systems. (CVE-2023-36435)
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 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(183024);
script_version("1.6");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/23");
script_cve_id("CVE-2023-36435", "CVE-2023-38171", "CVE-2023-44487");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2023/10/31");
script_xref(name:"IAVA", value:"2023-A-0543-S");
script_xref(name:"CEA-ID", value:"CEA-2024-0004");
script_xref(name:"IAVB", value:"2023-B-0083-S");
script_name(english:"Security Update for Microsoft .NET 7 Core (October 2023)");
script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by a .NET Core vulnerability");
script_set_attribute(attribute:"description", value:
"The version of Microsoft .NET 7 Core installed on the remote host is prior to 7.0.12. It is, therefore, affected by
multiple vulnerabilities as referenced in the 2023_Oct_10 advisory.
- A vulnerability exists in the ASP.NET Core Kestrel web server where a malicious client may flood the
server with specially crafted HTTP/2 requests, causing denial of service. (CVE-2023-44487)
- A null pointer vulnerability exists in MsQuic.dll which may lead to Denial of Service. This issue only
affects Windows systems. (CVE-2023-38171)
- A memory leak vulnerability exists in MsQuic.dll which may lead to Denial of Service. This issue only
affects Windows systems. (CVE-2023-36435)
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://dotnet.microsoft.com/download/dotnet/7.0");
script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36435");
script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38171");
script_set_attribute(attribute:"see_also", value:"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-44487");
script_set_attribute(attribute:"see_also", value:"https://support.microsoft.com/help/5030560");
# https://github.com/dotnet/core/blob/main/release-notes/7.0/7.0.11/7.0.12.md
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b24a5373");
script_set_attribute(attribute:"solution", value:
"Update .NET Core, remove vulnerable packages and refer to vendor advisory.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
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:N/UI:N/S:U/C:N/I:N/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-44487");
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:"2023/10/10");
script_set_attribute(attribute:"patch_publication_date", value:"2023/10/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/10/13");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:.net_core");
script_set_attribute(attribute:"generated_plugin", value:"former");
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) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("microsoft_dotnet_core_win.nbin");
script_require_keys("installed_sw/.NET Core Windows");
exit(0);
}
include('vcf.inc');
get_kb_item_or_exit('SMB/Registry/Enumerated');
var app_info = vcf::get_app_info(app:'.NET Core Windows', win_local:TRUE);
var constraints = [
{ 'min_version' : '7.0.0', 'fixed_version' : '7.0.12' }
];
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-36435
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-38171
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-44487
www.nessus.org/u?b24a5373
dotnet.microsoft.com/download/dotnet/7.0
msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36435
msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38171
msrc.microsoft.com/update-guide/vulnerability/CVE-2023-44487
support.microsoft.com/help/5030560
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
98.4%