This updated advisory is a follow-up to the original advisory titled ICSA-16-138-01 iRZ RUH2 3G Firmware Overwrite Vulnerability that was published May 17, 2016, on the NCCIC/ICS-CERT web site.
ICS-CERT has identified a firmware overwrite vulnerability in iRZβs RUH2 device. iRZ has discontinued this product and no longer offers support.
This vulnerability could be exploited remotely. Exploits that target this vulnerability are known to be publicly available.
The following iRZ product is affected:
An attacker could corrupt the firmware of the serial-to-Ethernet converters employed for substation communications and network routers.
Impact to individual organizations depends on many factors that are unique to each organization. ICS-CERT recommends that organizations evaluate the impact of this vulnerability based on their operational environment, architecture, and product implementation.
iRZ is a Russian-based company that maintains offices in several countries around the world, including China, Iran, Ukraine, Kazakhstan, France, Belgium, Switzerland, Italy, and Spain.
The affected product, RUH2, is a serial-to-network connector system. According to iRZ, RUH2s are deployed across several sectors including Commercial Facilities, Communications, Financial Services, Healthcare and Public Health, and others. iRZ estimates that this product is used primarily in Eastern Europe.
Authorized users can remotely update the firmware with an unvalidated patch.
CVE-2016-2309b has been assigned to this vulnerability. A CVSS v3 base score of 7.2 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).c
This vulnerability could be exploited remotely.
Exploits that target this vulnerability are publicly available.
An attacker with a low skill would be able to exploit this vulnerability.
iRZ recommends users replace the RUH2 with either the RUH2b or RUH3. Additional information on this vulnerability is available at:
<http://www.irz.net/en/support>.
ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should:
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
ICS-CERT also provides a section for control systems security recommended practices on the ICS-CERT web page at: http://ics-cert.us-cert.gov/content/recommended-practices. 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 ICSβCERT Technical Information Paper, ICS-TIP-12-146-01BβTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site (http://ics-cert.us-cert.gov/).
Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
Contact Information
For any questions related to this report, please contact the CISA at:
Email: [email protected]
Toll Free: 1-888-282-0870
For industrial control systems cybersecurity information: https://us-cert.cisa.gov/ics
or incident reporting: https://us-cert.cisa.gov/report
CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.
This product is provided subject to this Notification and this Privacy & Use policy.
Please share your thoughts.
We recently updated our anonymous product survey; weβd welcome your feedback.
twitter.com/icscert
www.irz.net/en/support
edit.ics-cert.us-cert.gov/sites/default/files/recommended_practices/NCCIC_ICS-CERT_Defense_in_Depth_2016_S508C.pdf
twitter.com/share?url=https%3A%2F%2Fus-cert.cisa.gov%2Fics%2Fadvisories%2FICSA-16-138-01
www.addthis.com/bookmark.php?url=https%3A%2F%2Fus-cert.cisa.gov%2Fics%2Fadvisories%2FICSA-16-138-01
www.cisa.gov
www.cisa.gov
www.cisa.gov/ics
www.cisa.gov/uscert
www.dhs.gov
www.dhs.gov/
www.dhs.gov/freedom-information-act-foia
www.dhs.gov/homeland-security-no-fear-act-reporting
www.dhs.gov/plain-writing-dhs
www.dhs.gov/plug-information
www.dhs.gov/privacy-policy
www.facebook.com/sharer.php?u=https%3A%2F%2Fus-cert.cisa.gov%2Fics%2Fadvisories%2FICSA-16-138-01
www.oig.dhs.gov/
www.surveymonkey.com/r/CISA-cyber-survey?product=https://us-cert.cisa.gov/ics/advisories/ICSA-16-138-01
www.usa.gov/
www.whitehouse.gov/