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AUSCERT External Security Bulletin Redistribution
ESB-2018.1185
Advisory (ICSA-18-107-03) - Rockwell Automation Stratix Services Router
18 April 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: Rockwell Automation Stratix Services Router
Publisher: ICS-CERT
Operating System: Network Appliance
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Mitigation
CVE Names: CVE-2018-0175 CVE-2018-0167 CVE-2018-0158
CVE-2018-0151
Reference: ESB-2018.1184
ESB-2018.0912
ESB-2018.0903
Original Bulletin:
https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03
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Advisory (ICSA-18-107-03)
Rockwell Automation Stratix Services Router
Legal Notice
All information products included in http://ics-cert.us-cert.gov are provided
"as is" for informational purposes only. The Department of Homeland Security
(DHS) does not provide any warranties of any kind regarding any information
contained within. DHS does not endorse any commercial product or service,
referenced in this product or otherwise. Further dissemination of this product
is governed by the Traffic Light Protocol (TLP) marking in the header. For more
information about TLP, see http://www.us-cert.gov/tlp/.
1. EXECUTIVE SUMMARY
CVSS v3 9.8
ATTENTION: Exploitable remotely/low skill level to exploit.
Vendor: Rockwell Automation
Equipment: Allen-Bradley Stratix 5900 Services Router
Vulnerabilities: Improper Input Validation, Improper Restriction of
Operations within the Bounds of a Memory Buffer, Use of
Externally-Controlled Format String.
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could result in loss of
availability, confidentiality, and/or integrity caused by memory exhaustion,
module restart, information corruption, and/or information exposure.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Allen-Bradley Stratix Services Router use a
vulnerable version of Cisco IOS or IOS XE:
Allen-Bradley Stratix 5900 Services Router, version 15.6.3M1 and earlier.
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER INPUT VALIDATION CWE-20
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco
IOS Software and Cisco IOS XE Software could allow an unauthenticated remote
attacker to cause a memory leak or a reload of an affected device that leads to
a denial of service (DoS) condition.
The vulnerability is due to incorrect processing of certain IKEv2 packets. An
attacker could exploit this vulnerability by sending crafted IKEv2 packets to
an affected device to be processed. A successful exploit could cause an
affected device to continuously consume memory and eventually reload, resulting
in a DoS condition.
CVE-2018-0158 has been assigned to this vulnerability. A CVSS v3 base score of
8.6 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).
3.2.2 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER
CWE-119
A vulnerability in the quality of service (QoS) subsystem of Cisco IOS Software
and Cisco IOS XE Software could allow an unauthenticated remote attacker to
cause a DoS condition or execute arbitrary code with elevated privileges.
The vulnerability is due to incorrect bounds checking of certain values in
packets that are destined for UDP port 18999 of an affected device. An attacker
could exploit this vulnerability by sending malicious packets to an affected
device. When the packets are processed, an exploitable buffer overflow
condition may occur. A successful exploit could allow the attacker to execute
arbitrary code on the affected device with elevated privileges. The attacker
could also leverage this vulnerability to cause the device to reload, causing a
temporary DoS condition while the device is reloading.
The malicious packets must be destined to and processed by an affected device.
Traffic transiting a device will not trigger the vulnerability.
CVE-2018-0151 has been assigned to this vulnerability. A CVSS v3 base score of
9.8 has been calculated; the CVSS vector string is
(AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.3 IMPROPER RESTRICTION OF OPERATIONS WITHIN THE BOUNDS OF A MEMORY BUFFER
CWE-119
A buffer overflow vulnerability in the LLDP subsystem of Cisco IOS Software,
Cisco IOS XE Software, and Cisco IOS XR Software could allow an adjacent,
unauthenticated attacker to cause a DoS condition or execute arbitrary code
with elevated privileges.
CVE-2018-0167 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is
(AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.2.4 USE OF EXTERNALLY-CONTROLLED FORMAT STRING CWE-134
A format string vulnerability in the LLDP subsystem of Cisco IOS Software and
Cisco IOS XE Software could allow an adjacent, unauthenticated attacker to
cause a DoS condition or execute arbitrary code with elevated privileges.
CVE-2018-0175 has been assigned to this vulnerability. A CVSS v3 base score of
8.8 has been calculated; the CVSS vector string is
(AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
3.3 BACKGROUND
Critical Infrastructure Sectors: Critical Manufacturing, Energy, Water and
Wastewater Systems Countries/Areas Deployed: Worldwide Company Headquarters
Location: Wisconsin, USA
3.4 RESEARCHER
Rockwell Automation reported these vulnerabilities to NCCIC from the
semi-annual Cisco IOS and IOS XE Software Security Advisory Bundled
Publication.
4. MITIGATIONS
Rockwell Automation has released knowledge base article 1073313 which can be
found at the following location:
https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1073313/ (login
required)
Cisco has released Snort Rules 46110 and 46111 to help address CVE-2018-0158
and CVE-2018-0151. See new rules at:
https://www.cisco.com/web/software/286271056/117258/sf-rules-2018-03-29-new.html
CVE-2018-0151: Users who do not use the Adaptive QoS for DMVPN feature can deny
all traffic destined to UDP port 18999 on an affected device by using a Control
Plane Policing (CoPP) policy. If the Adaptive QoS for DMVPN feature is later
configured, the device must be upgraded to an unaffected release of Cisco IOS
Software or Cisco IOS XE Software and the CoPP policy must be removed.
CVE-2018-0167 and CVE-2018-0175 have no specific mitigations in place. See the
following Cisco Vulnerability advisory for more details:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp
Rockwell Automation also recommends that users implement the following general
security guidelines:
- Help minimize network exposure for all control system devices and/or
systems, and confirm that they are not accessible from the Internet.
- Locate control system networks and devices behind firewalls, and isolate
them from the business network.
- When remote access is required, use secure methods, such as Virtual
Private Networks (VPNs), recognizing that VPNs may have vulnerabilities
and should be updated to the most current version available. Also
recognize that VPN is only as secure as the connected devices.
NCCIC reminds organizations to perform proper impact analysis and risk
assessment prior to deploying defensive measures.
NCCIC also provides a section for control systems security recommended
practices on the ICS-CERT web page. Several recommended practices are available
for reading and download, including Improving Industrial Control Systems
Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available
in the ICS-CERT Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber
Intrusion Detection and Mitigation Strategies, that is available for download
from the ICS-CERT website.
Organizations observing any suspected malicious activity should follow their
established internal procedures and report their findings to NCCIC for tracking
and correlation against other incidents.
No known public exploits specifically target these vulnerabilities
Contact Information
For any questions related to this report, please contact the NCCIC at:
Email: NCCICCUSTOMERSERVICE@hq.dhs.gov Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information:
http://ics-cert.us-cert.gov or incident reporting:
https://ics-cert.us-cert.gov/Report-Incident?
The NCCIC continuously strives to improve its products and services. You can
help by choosing one of the links below to provide feedback about this product.
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