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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1185 Advisory (ICSA-18-107-03) - Rockwell Automation Stratix Services Router 18 April 2018 =========================================================================== 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 - --------------------------BEGIN INCLUDED TEXT-------------------- 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWtbNAYx+lLeg9Ub1AQi7tw//Vj7PlVeUlxEXuEMSB6vAaz0TvJ40yWdz R9EY9wD8dkzzdGzcGBM5od+3wV/CuTztdhGbQY2UEs9XgTdQEIK6NRqJ79dT5xO1 d753c2H9WseqCjLRLt8kxrwBPtFNnXjerkadxhN+A8vmJ7EQsyErUTuj0xw73VW3 Ilu2cOdhOhzZN6hNLitXz+z3gbT7vkmH2lizVZO3Qvku5+SldAPMXqRgfH4TK+2G I0yMXhSQW6NIOYHT8rHFHZl6qZDJkHcImWhygiSMVwdGVUC8khUAT9Alh8s8REWi oRN/2tLNUdGSUcvB2Sj5AI7PBb5Zw4OapVZ3uuWI+E5SPBxzHfW9EsqDI0ROpsue qhdDXlN1SUIFa8j/iE+JOtiovFWsjmwBTzGXRHgT/VVKjyqELTilqhQzYm352N0y 51caXeUI9H9TvbtMnLL3gmI7MGnDaRv/alZdCa5yMwetg1Vv4tEBzXjdNAUXghUN qOKS2X4YpJVXe8eLeRI4jvwJ6LpSFVmICkKyrS4wEV9VlatXc0nOddzw8xXmDeCj pEH/QhKAS6p05rI2x8xWHXHwjrgViiOEdJ6kwdbIyKroDRrlqpakdbdmTiJBPiXj ubYJ0GU9FHRQj8RzUpxidb5PNUA8TUv5JPHT8mrBZY5DDuIUhpzvugxVEQLbHMi1 6SXTMxFEKO4= =Z8jj -----END PGP SIGNATURE-----