CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
59.7%
The remote Citrix NetScaler device is affected by an authentication bypass vulnerability in the Application Delivery Controller (ADC) and the Gateway Management Interface.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(103467);
script_version("1.5");
script_cvs_date("Date: 2019/11/12");
script_cve_id("CVE-2017-14602");
script_bugtraq_id(100980);
script_name(english:"Citrix NetScaler Authentication Bypass Vulnerability (CTX227928)");
script_summary(english:"Checks the Citrix NetScaler version.");
script_set_attribute(attribute:"synopsis", value:
"The remote device is affected by an authentication
bypass vulnerability.");
script_set_attribute(attribute:"description", value:
"The remote Citrix NetScaler device is affected by an
authentication bypass vulnerability in the Application Delivery
Controller (ADC) and the Gateway Management Interface.");
script_set_attribute(attribute:"see_also", value:"https://support.citrix.com/article/CTX227928");
script_set_attribute(attribute:"solution", value:
"Upgrade to Citrix NetScaler ADC and Gateway version 10.1 build
135.18 / 10.5 build 66.9 / 10.5e build 60.7010.e / 11.0 build
70.16 / 12.0 build 41.24 or 53.13 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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:H/UI:N/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-2017-14602");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/09/25");
script_set_attribute(attribute:"patch_publication_date", value:"2017/09/25");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/26");
script_set_attribute(attribute:"plugin_type", value:"combined");
script_set_attribute(attribute:"cpe", value:"cpe:/o:citrix:netscaler_application_delivery_controller_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:citrix:netscaler_access_gateway_firmware");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"CGI abuses");
script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("citrix_netscaler_detect.nbin");
script_require_keys("Host/NetScaler/Detected");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
app_name = "Citrix NetScaler";
version = get_kb_item_or_exit("Host/NetScaler/Version");
build = get_kb_item("Host/NetScaler/Build");
enhanced = get_kb_item("Host/NetScaler/Enhanced");
fixed_build = NULL;
if (isnull(build)) exit(0, "The build number of " + app_name + " " + version + " could not be determined.");
display_version = version + "-" + build;
version = version + "." + build;
if (!enhanced)
{
# non-enhanced builds
if (version =~ "^10\.1" && ver_compare(ver:build, fix:"135.18") == -1)
{
fixed_build = "135.18";
}
else if (version =~ "^10\.5" && ver_compare(ver:build, fix:"66.9") == -1)
{
fixed_build = "66.9";
}
else if (version =~ "^11\.0" && ver_compare(ver:build, fix:"70.16") == -1)
{
fixed_build = "70.16";
}
else if (version =~ "^11\.1" && ver_compare(ver:build, fix:"55.13") == -1)
{
fixed_build = "11.1";
}
else if (version =~ "^12\.0" && ver_compare(ver:build, fix:"53.13") == -1)
{
# Also check if the build is 41.24 as that is not affected
if (build == "41.24")
audit(AUDIT_INST_VER_NOT_VULN, app_name, display_version);
else
fixed_build = "53.13";
}
}
else
{
# Enhanced build
display_version = display_version + ".e";
build = str_replace(string:build, find:'e', replace:'');
if (version =~ "^10\.5" && ver_compare(ver:build, fix:"60.7010") == -1)
{
fixed_build = "60.7010.e";
}
build = build+".e";
}
if (isnull(fixed_build))
{
audit(AUDIT_INST_VER_NOT_VULN, app_name, display_version);
}
report =
'\n Installed version : ' + display_version +
'\n Installed build : ' + build +
'\n Fixed build : ' + fixed_build +
'\n';
security_report_v4(port:0, severity:SECURITY_HOLE, extra:report);
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
SINGLE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
59.7%