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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.2036 Meinberg Radio Clocks LANTIME M-Series XSS 4 November 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Meinberg Radio Clocks LANTIME M-Series Publisher: US-CERT Operating System: Network Appliance Impact/Access: Cross-site Scripting -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2014-5417 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-14-275-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-14-275-01) Meinberg Radio Clocks LANTIME M-Series XSS Original release date: October 30, 2014 | Last revised: October 31, 2014 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/. OVERVIEW This advisory was originally posted to the US-CERT secure Portal library on October 2, 2014, and is being released to the ICS-CERT web site. Martem Telecontrol Systems security researcher Aivar Liimets has identified a reflected crosssite scripting vulnerability in the Meinberg Radio Clocks GmbH & Co. KG LANTIME M400 web interface. Meinberg has produced a firmware update that mitigates this vulnerability in all LANTIME M-Series. Aivar Liimets has tested the firmware update to validate that it resolves the vulnerability. This vulnerability could be exploited remotely. AFFECTED PRODUCTS The following Meinberg Network Time Protocol (NTP) Server firmware versions are affected: LANTIME M-Series models: V6.15.019 and prior. IMPACT The reflected cross-site scripting vulnerability could cause the time server to provide misinformation to devices. 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. BACKGROUND Meinberg Radio Clocks GmbH & Co. KG is an international provider of electronic modules, based in Bad Pyrmont, Germany. The affected products, the LANTIME M-Series, are NTP Servers. According to Meinberg, the Meinberg NTP Servers are deployed across several sectors including Commercial Facilities, Communications, Energy, Financial Services, and Transportation Systems. Meinberg estimates that these products are used primarily in the United States and Europe. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW CROSS-SITE SCRIPTINGCWE-79: Improper Neutralization of Input During Web Page Generation (Cross-site Scripting), http://cwe.mitre.org/data/definitions/79.html, web site last accessed October 30, 2014. The web interface for LANTIME M-Series contains a flaw that allows a reflected cross-site scripting vulnerability. CVE-2014-5417NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2014-5417, NIST uses this advisory to create the CVE web site report. has been assigned to this vulnerability. A CVSS v2 base score of 7.5 has been assigned; the CVSS vector string is (AV:N/AC:L/Au:N/C:P/I:P/A:P).CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:P/I:P/A:P, web site last accessed October 30, 2014. VULNERABILITY DETAILS EXPLOITABILITY This vulnerability could be exploited remotely. EXISTENCE OF EXPLOIT No known public exploits specifically target this vulnerability. DIFFICULTY An attacker with a low skill would be able to exploit this vulnerability. MITIGATION Meinbergs firmware update, Version 6.15.020, resolves this vulnerability. Please contact Meinberg customer service for information on how to download and install the firmware update, or obtain the update at the following online location: http://news.meinberg.de/259 Meinberg Radio Clocks Lange Wand 9 D-31812 Bad Pyrmont Phone: ++49(0)5281-9309 0 Fax: ++49(0)5281-9309 30 http:www.meinberg.de Email: info@meinberg.de ICS-CERT encourages asset owners to take additional defensive measures to protect against this and other cybersecurity risks. * Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. * Locate control system networks and remote 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. 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. ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. Additional mitigation guidance and recommended practices are publicly available in the ICSCERT Technical Information Paper, ICS-TIP-12-146-01BTargeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site (www.ics-cert.org). 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. In addition, ICS-CERT recommends that users take the following measures to protect themselves from social engineering attacks: 1. Do not click web links or open unsolicited attachments in email messages. 2. Refer to Recognizing and Avoiding Email ScamsRecognizing and Avoiding Email Scams, http://www.us-cert.gov/reading_room/emailscams_0905.pdf, web site last accessed October 30, 2014. for more information on avoiding email scams. 3. Refer to Avoiding Social Engineering and Phishing AttacksNational Cyber Alert System Cyber Security Tip ST04-014, http://www.us-cert.gov/cas/tips/ST04-014.html, web site last accessed October 30, 2014. for more information on social engineering attacks. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov Toll Free: 1-877-776-7585 International Callers: (208) 526-0900 For industrial control systems security information and incident reporting: http://ics-cert.us-cert.gov ICS-CERT 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. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVFgqJRLndAQH1ShLAQKdPw//WDAeOSNO0jT+lvAUu7P32SwZcM8D4QNy KgLec0+bXdfo35b71oU+XiicZeKdID0Q8V0sD10aBAOv/x/RqDGRj3uJR2FAg4Hf TMLqfoMMZrwVKjhiFd/OL119Y2YiNUA1zyw/bMmvSMm2h2fzlp3N7W2VfBKZ+KG4 2yk1GPDRYSpnJmUyngtIAq7OgRS3/AaTzsXJK7wyAbUzPX7MMC0qJULaellm/JbR yBK+uVr9NqcyWxYWDELYKQgozVpBDRCevz8ZPVaFeGO8HrJL2ZGPZluHLTjeE0NS GC58Q0fh213Fao9dRU9IXaTMs6FfYJjh+SZpmx2H5UgqrFmf5YAnBW27buOtrPa6 HQrZjGSr81dlMJIUNNQDTUH5axuaHraMdniLJ4JiEGvtnLfzrLup8aaPsacvjl6u IYHA47wzAei6I78IP3MOkR/N/QTX7cMOeeek04dGkhvkhLODyan6O8xNtgRqwysy PIZ0q3iOul5dOobthEir+BOcGa3Xd4YTLk0AOJp3s7JYxYFSU1+Fy7h4v0LapFFm wwm9UFE18v1GtRX/FEKFg+xfTLSadWHOzOLkocu6TsH8QfTv7evffYPRxKHmGd7b 3qaUDvoaIN/y7k2e4bYXOKsG9PCqT+wbLUApMIpk0AqhV/OLgS+5hFKkLyVT17pa g6lUJrRxHRg= =fyVo -----END PGP SIGNATURE-----