CVSS2
Attack Vector
ADJACENT_NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
AV:A/AC:M/Au:N/C:N/I:P/A:P
AI Score
Confidence
High
EPSS
Percentile
79.1%
A vulnerability in the authentication code of ntpd could allow an unauthenticated, remote attacker to inject NTP state variables without knowledge of the NTP keys. The vulnerability is due to invalid processing of the NTP packets when authentication fails. An attacker could exploit this vulnerability by periodically sending NTP packets with set NTP state variables. A successful exploit could allow the attacker to disrupt communication between NTP hosts, preventing synchronization.
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(501803);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/17");
script_cve_id("CVE-2015-1799");
script_name(english:"Rockwell Automation Stratix NTP Authentication doesn't protect symmetric associations against DoS attacks (CVE-2015-1799)");
script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
script_set_attribute(attribute:"description", value:
"A vulnerability in the authentication code of ntpd could allow
an unauthenticated, remote attacker to inject NTP state variables
without knowledge of the NTP keys.
The vulnerability is due to invalid processing of the NTP packets
when authentication fails. An attacker could exploit this vulnerability
by periodically sending NTP packets with set NTP state variables.
A successful exploit could allow the attacker to disrupt communication
between NTP hosts, preventing synchronization.
This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
# https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20150408-ntpd
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bbbd3c7e");
# https://www.rockwellautomation.com/en-us/support/advisory.PN965.html
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?141f2981");
# https://www.cisa.gov/news-events/ics-advisories/icsa-17-094-04
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?c7bf8ef2");
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.
Rockwell Automation has provided a new firmware version, Version 15.6.3, to mitigate these vulnerabilities.
Rockwell Automation encourages users of the affected versions to update to the latest available software versions
addressing the associated risk, and including improvements to further harden the software and enhance its resilience
against similar malicious attacks. Users can find the latest firmware version by searching for their device at the
following web site:
http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15
Additional precautions and risk mitigation strategies specific to these types of attacks are recommended in the Rockwell
Automation security release. When possible, multiple strategies should be implemented simultaneously.
https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1041191
Please also refer to Cisco's security advisories (linked below) for additional workarounds and details for these
vulnerabilities.");
script_set_cvss_base_vector("CVSS2#AV:A/AC:M/Au:N/C:N/I:P/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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-2015-1799");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(755);
script_set_attribute(attribute:"vuln_publication_date", value:"2015/04/08");
script_set_attribute(attribute:"patch_publication_date", value:"2015/04/08");
script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/15");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_set_attribute(attribute:"cpe", value:"cpe:/h:rockwellautomation:allen-bradley_stratix_5900_industrial_managed_ethernet_switch");
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/Rockwell");
exit(0);
}
include('tenable_ot_cve_funcs.inc');
get_kb_item_or_exit('Tenable.ot/Rockwell');
var asset = tenable_ot::assets::get(vendor:'Rockwell');
var vuln_cpes = {
"cpe:/h:rockwellautomation:allen-bradley_stratix_5900_industrial_managed_ethernet_switch" :
{"versionEndExcluding" : "15.6.3", "family" : "Stratix"}
};
tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_WARNING);
Vendor | Product | Version | CPE |
---|---|---|---|
rockwellautomation | allen-bradley_stratix_5900_industrial_managed_ethernet_switch | cpe:/h:rockwellautomation:allen-bradley_stratix_5900_industrial_managed_ethernet_switch |