CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
73.9%
The remote Windows host has an installation of .NET Core with a version less than 2.0.5. Therefore, the host is affected by multiple vulnerabilities :
A security feature bypass in X509 Certificate Validation allows an attacker to present a certificate that is marked as invalid for a specific use, but a component uses it for that purpose. (CVE-2018-0786)
A denial of service vulnerability exists due to improper processing of XML documents. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET application. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to a .NET Core application. (CVE-2018-0764)
#
# (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(105730);
script_version("1.8");
script_cvs_date("Date: 2019/11/08");
script_cve_id("CVE-2018-0764", "CVE-2018-0786");
script_name(english:"Security Update for .NET Core (January 2018)");
script_summary(english:"Checks for Windows Install of .NET Core.");
script_set_attribute(attribute:"synopsis", value:
"The remote Windows host is affected by a .NET Core runtime
vulnerability.");
script_set_attribute(attribute:"description", value:
"The remote Windows host has an installation of .NET Core
with a version less than 2.0.5. Therefore, the host is affected
by multiple vulnerabilities :
- A security feature bypass in X509 Certificate Validation
allows an attacker to present a certificate that is
marked as invalid for a specific use, but a component
uses it for that purpose. (CVE-2018-0786)
- A denial of service vulnerability exists due to improper
processing of XML documents. An attacker who
successfully exploited this vulnerability could cause
a denial of service against a .NET application. A
remote unauthenticated attacker could exploit this
vulnerability by issuing specially crafted requests
to a .NET Core application. (CVE-2018-0764)");
script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/51");
script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/announcements/issues/52");
# https://blogs.msdn.microsoft.com/dotnet/2018/01/09/net-core-january-2018-update/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ebdb4bc7");
# https://github.com/dotnet/core/blob/master/release-notes/1.0/1.0.9.md
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6ee5ffe3");
# https://github.com/dotnet/core/blob/master/release-notes/1.1/1.1.6.md
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e1e826f0");
# https://github.com/dotnet/core/blob/master/release-notes/2.0/2.0.5.md
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?9a103486");
# https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0786
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?3759d74b");
# https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0764
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cf7d5ce3");
script_set_attribute(attribute:"solution", value:
"Update to .NET Core Runtime version 1.09 / 1.1.6 / 2.0.5 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-2018-0786");
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:"2018/01/09");
script_set_attribute(attribute:"patch_publication_date", value:"2018/01/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/10");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:.net_core");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2018-2019 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");
script_require_ports(139, 445);
exit(0);
}
include("global_settings.inc");
include("audit.inc");
include("install_func.inc");
include("misc_func.inc");
include("smb_func.inc");
appname = '.NET Core Windows';
port = kb_smb_transport();
installs = get_installs(app_name:appname, exit_if_not_found:TRUE);
report = '';
foreach install (installs[1])
{
version = install['version'];
path = install['path'];
fix = '';
# Affected: 1.0.x < 1.0.9 / 1.1.x < 1.1.6 / 2.0.x < 2.0.5
if (version =~ '^2\\.0\\.') fix = '2.0.5.26021';
else if (version =~ '^1\\.1\\.') fix = '1.1.6.1663';
else if (version =~ '^1\\.0\\.') fix = '1.0.9.5018';
if (fix != '' && ver_compare(ver:version, fix:fix) < 0)
{
report +=
'\n Path : ' + path +
'\n Installed version : ' + version +
'\n Fixed version : ' + fix +
'\n';
}
}
if (report != '')
{
security_report_v4(port:port, severity:SECURITY_WARNING, extra:report);
exit(0);
}
audit(AUDIT_INST_VER_NOT_VULN, appname);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0764
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0786
www.nessus.org/u?3759d74b
www.nessus.org/u?6ee5ffe3
www.nessus.org/u?9a103486
www.nessus.org/u?cf7d5ce3
www.nessus.org/u?e1e826f0
www.nessus.org/u?ebdb4bc7
github.com/dotnet/announcements/issues/51
github.com/dotnet/announcements/issues/52
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS
Percentile
73.9%