CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
90.0%
The Microsoft ASP.NET Core installation on the remote host is version 2.1.x < 2.1.15, 3.0.x < 3.0.2, or 3.1.x < 3.1.1.
It is, therefore, affected by multiple vulnerabilities:
A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application.
The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. (CVE-2020-0602)
A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. (CVE-2020-0603)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(133049);
script_version("1.5");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");
script_cve_id("CVE-2020-0602", "CVE-2020-0603");
script_xref(name:"IAVA", value:"2020-A-0027-S");
script_name(english:"Security Update for Microsoft ASP.NET Core (January 2020)");
script_set_attribute(attribute:"synopsis", value:
"The Microsoft ASP.NET Core installations on the remote host contain vulnerable packages.");
script_set_attribute(attribute:"description", value:
"The Microsoft ASP.NET Core installation on the remote host is version 2.1.x < 2.1.15, 3.0.x < 3.0.2, or 3.1.x < 3.1.1.
It is, therefore, affected by multiple vulnerabilities:
- A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who
successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application.
The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could
exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. (CVE-2020-0602)
- A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in
memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the
current user. If the current user is logged on with administrative user rights, an attacker could take control of
the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts
with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less
impacted than users who operate with administrative user rights. (CVE-2020-0603)");
# https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0602
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?530ba67f");
# https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0603
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?374d2043");
script_set_attribute(attribute:"see_also", value:"https://github.com/aspnet/Announcements/issues/402");
script_set_attribute(attribute:"see_also", value:"https://github.com/aspnet/Announcements/issues/403");
script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/aspnetcore/issues/18336");
script_set_attribute(attribute:"see_also", value:"https://github.com/dotnet/aspnetcore/issues/18337");
script_set_attribute(attribute:"solution", value:
"Update ASP.NET Core, remove vulnerable packages and refer to vendor advisory.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
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:R/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-2020-0603");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2020/01/14");
script_set_attribute(attribute:"patch_publication_date", value:"2020/01/14");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/17");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:asp.net_core");
script_set_attribute(attribute:"stig_severity", value:"I");
script_set_attribute(attribute:"thorough_tests", value:"true");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2020-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("microsoft_asp_dotnet_core_win.nbin");
script_require_keys("installed_sw/ASP .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');
include('vcf.inc');
appname = 'ASP .NET Core Windows';
port = kb_smb_transport();
vuln = FALSE;
install = get_single_install(app_name:appname);
report =
'\n Path : ' + install['path'] +
'\n Installed version : ' + install['version'] +
'\n';
package_dat = {
'Microsoft.AspNetCore.All':{
'constraints':[
{ 'min_version' : '2.1.0', 'fixed_version' : '2.1.15' }
]
},
'Microsoft.AspNetCore.App':{
'constraints':[
{ 'min_version' : '2.1.0', 'fixed_version' : '2.1.15' },
{ 'min_version' : '3.0.0', 'fixed_version' : '3.0.1' },
{ 'min_version' : '3.1.0', 'fixed_version' : '3.1.1' }
]
},
'Microsoft.AspNetCore.Http.Connections':{
'constraints':[
{ 'min_version' : '1.0.0', 'max_version' : '1.0.4', 'fixed_version' : '1.0.15' }
]
}
};
foreach package (keys(package_dat))
{
foreach instance (split(install[package], sep:';', keep:false))
{
inst = split(instance, sep:'?', keep:false);
out = vcf::check_version(version:vcf::parse_version(inst[0]), constraints:package_dat[package]['constraints']);
if(!vcf::is_error(out) && !isnull(out))
{
vuln = TRUE;
report +=
'\n Package : ' + package +
'\n Path : ' + inst[1] +
'\n Installed version : ' + inst[0] +
'\n Fixed version : ' + out['fixed_version'] +
'\n';
}
}
}
if(!vuln) audit(AUDIT_INST_VER_NOT_VULN, appname + ' ' + install['version']);
security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0602
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-0603
www.nessus.org/u?374d2043
www.nessus.org/u?530ba67f
github.com/aspnet/Announcements/issues/402
github.com/aspnet/Announcements/issues/403
github.com/dotnet/aspnetcore/issues/18336
github.com/dotnet/aspnetcore/issues/18337
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS
Percentile
90.0%