7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.965 High
EPSS
Percentile
99.6%
Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result in remote code execution. (As of 2020.1.114, a default setting prevents the exploit. In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(135970);
script_version("1.8");
script_set_attribute(attribute:"plugin_modification_date", value:"2022/12/05");
script_cve_id("CVE-2019-18935");
script_xref(name:"IAVA", value:"2020-A-0219");
script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/05/03");
script_xref(name:"CEA-ID", value:"CEA-2020-0129");
script_name(english:"Telerik UI for ASP.NET AJAX RadAsyncUpload .NET Deserialization Vulnerability");
script_set_attribute(attribute:"synopsis", value:
"A web application development suite installed on the remote Windows
host is affected by a deserialization vulnerability.");
script_set_attribute(attribute:"description", value:
"Progress Telerik UI for ASP.NET AJAX through 2019.3.1023 contains a .NET deserialization vulnerability
in the RadAsyncUpload function. This is exploitable when the encryption keys are known due to
the presence of CVE-2017-11317 or CVE-2017-11357, or other means. Exploitation can result
in remote code execution. (As of 2020.1.114, a default setting prevents the exploit.
In 2019.3.1023, but not earlier versions, a non-default setting can prevent exploitation.)");
# https://www.telerik.com/support/kb/aspnet-ajax/details/allows-javascriptserializer-deserialization
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?de2ce6ef");
# https://docs.telerik.com/devtools/aspnet-ajax/controls/asyncupload/security?&_ga=2.224762457.29387225.1587722153-1707628900.1586272484#allowedcustommetadatatypes
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?be6fd178");
# https://docs.telerik.com/devtools/aspnet-ajax/controls/asyncupload/security
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?57e10c1e");
script_set_attribute(attribute:"solution", value:
"Upgrade to Telerik UI for ASP.NET AJAX version R3 2019 SP1
(2019.3.1023) or later, and enable the type whitelisting feature of RadAsyncUpload.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-18935");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2019/12/09");
script_set_attribute(attribute:"patch_publication_date", value:"2019/12/09");
script_set_attribute(attribute:"plugin_publication_date", value:"2020/04/24");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/a:telerik:ui_for_asp.net_ajax");
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("telerik_ui_for_aspnet_ajax_installed.nbin");
script_require_keys("installed_sw/Telerik UI for ASP.NET AJAX");
script_require_ports(139, 445);
exit(0);
}
include('install_func.inc');
include('smb_func.inc');
include('smb_hotfixes.inc');
var app_name = 'Telerik UI for ASP.NET AJAX';
var opt_in = FALSE;
var install = get_single_install(app_name:app_name, exit_if_unknown_ver:TRUE);
var version = install['version'];
var path = install['path'];
# 2010.1.309 and earlier not affected
if (ver_compare(ver:version, fix:'2010.1.309.0', strict:FALSE) <= 0)
audit(AUDIT_INST_PATH_NOT_VULN, app_name, version, path);
# 2020.1.114 and later have default settings available
if (ver_compare(ver:version, fix:'2020.1.114.0', strict:FALSE) >= 0)
audit(AUDIT_INST_PATH_NOT_VULN, app_name, version, path);
# 2019.3.1023 has opt-in settings available, but not by default
if ((ver_compare(ver:version, fix:'2019.3.1023', strict:FALSE) >= 0) &&
(ver_compare(ver:version, fix:'2020.1.114.0', strict:FALSE) <= 0))
{
opt_in = TRUE;
}
if (opt_in)
{
# if version is 2019.3.1023 or higher, but lower than 2020.1.114.0,
# type whitelisting feature of RadAsyncUpload needs to be enabled manually.
# so if we're paranoid, we add a note to the report
# (done below) and if we're not paranoid, we audit out
if (report_paranoia < 2) audit(AUDIT_PARANOID);
}
var port = get_kb_item('SMB/transport');
if (empty_or_null(port))
port = 445;
var report = report_items_str(
report_items:make_array(
'Path', path,
'Installed version', version,
'Fixed version', '2019.3.1023'
),
ordered_fields:make_list('Path', 'Installed version', 'Fixed version')
);
if (opt_in)
report += '\n\n' + 'Although the type whitelisting feature of RadAsyncUpload is available for this version,' +
'\n' + 'we are not able to determine if this is actually enabled. Following the advisory,' +
'\n' + 'you should ensure that this is the case.';
security_report_v4(port:port, severity:SECURITY_HOLE, extra:report);
Vendor | Product | Version | CPE |
---|---|---|---|
telerik | ui_for_asp.net_ajax | cpe:/a:telerik:ui_for_asp.net_ajax |
7.5 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:P/I:P/A:P
9.8 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
0.965 High
EPSS
Percentile
99.6%