5 Medium
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
7.5 High
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.8 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
36.1%
Moxa IKS and EDS does not properly check authority on server side, which results in a read-only user being able to perform arbitrary configuration changes.
This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.
#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
include('compat.inc');
if (description)
{
script_id(501554);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");
script_cve_id("CVE-2019-6520");
script_name(english:"Moxa IKS, EDS Improper Access Control (CVE-2019-6520)");
script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
script_set_attribute(attribute:"description", value:
"Moxa IKS and EDS does not properly check authority on server side,
which results in a read-only user being able to perform arbitrary
configuration changes.
This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
script_set_attribute(attribute:"see_also", value:"https://ics-cert.us-cert.gov/advisories/ICSA-19-057-01");
script_set_attribute(attribute:"solution", value:
'The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.
Moxa recommends users implement the following measures to mitigate these vulnerabilities.
- Install firmware patch. Patches may be requested from Moxa Customer Service (login required):
- Set EDS series Web configuration as "https onlyΓ’ΒΒ to reduce predictable session ID concern.
Please see MoxaΓ’ΒΒs security advisory for more information.');
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-2019-6520");
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:"2019/03/05");
script_set_attribute(attribute:"patch_publication_date", value:"2019/03/05");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/08/02");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:eds-405a_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:eds-408a_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:eds-510a_firmware");
script_set_attribute(attribute:"cpe", value:"cpe:/o:moxa:iks-g6824a_firmware");
script_set_attribute(attribute:"generated_plugin", value:"former");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Tenable.ot");
script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("tenable_ot_api_integration.nasl");
script_require_keys("Tenable.ot/Moxa");
exit(0);
}
include('tenable_ot_cve_funcs.inc');
get_kb_item_or_exit('Tenable.ot/Moxa');
var asset = tenable_ot::assets::get(vendor:'Moxa');
var vuln_cpes = {
"cpe:/o:moxa:iks-g6824a_firmware" :
{"versionEndIncluding" : "5.6", "family" : "IKS"},
"cpe:/o:moxa:eds-405a_firmware" :
{"versionEndIncluding" : "3.8", "family" : "MoxaEDS"},
"cpe:/o:moxa:eds-408a_firmware" :
{"versionEndIncluding" : "3.8", "family" : "MoxaEDS"},
"cpe:/o:moxa:eds-510a_firmware" :
{"versionEndIncluding" : "3.8", "family" : "MoxaEDS"}
};
tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_WARNING);
Vendor | Product | Version | CPE |
---|---|---|---|
moxa | eds-405a_firmware | cpe:/o:moxa:eds-405a_firmware | |
moxa | eds-408a_firmware | cpe:/o:moxa:eds-408a_firmware | |
moxa | eds-510a_firmware | cpe:/o:moxa:eds-510a_firmware | |
moxa | iks-g6824a_firmware | cpe:/o:moxa:iks-g6824a_firmware |
5 Medium
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
7.5 High
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.8 High
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
36.1%