23 September 2015
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2477 Everest Software PeakHMI Pointer Dereference Vulnerabilities 23 September 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Everest Software PeakHMI Publisher: US-CERT Operating System: Network Appliance Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-6454 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-15-232-01 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-15-232-01) Everest Software PeakHMI Pointer Dereference Vulnerabilities Original release date: September 22, 2015 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 August 20, 2015, and is being released to the NCCIC/ICS-CERT web site. Independent researcher Josep Pi Rodriguez has identified two-pointer dereference vulnerabilities in the Everest Software LLC PeakHMI application. Everest Software LLC has produced a new version to mitigate these vulnerabilities. Josep Pi Rodriguez has tested the new version to validate that it resolves the vulnerabilities. These vulnerabilities could be exploited remotely. AFFECTED PRODUCTS Everest Software LLC reports that the vulnerabilities affect the following versions of PeakHMI: PeakHMI versions prior to 126.96.36.199 IMPACT An attacker who exploits these vulnerabilities while the video server is enabled could remotely crash the service. Impact to individual organizations depends on many factors that are unique to each organization. ICS-CERT recommends that organizations evaluate the impact of these vulnerabilities based on their operational environment, architecture, and product implementation. BACKGROUND Everest Software LLC is a United States-based company. The affected product, PeakHMI, is a human-machine interface (HMI) product used in industrial control systems. According to Everest Software LLC, PeakHMI products are deployed across most sectors. Everest Software LLC estimates that these products are used primarily in the United States but are deployed worldwide. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW POINTER DEREFERENCE [a] The researcher found two separate instances where a specially crafted packet could cause the program to dereference a pointer. This can only be exploited when the video server is enabled. CVE-2015-6454 [b] has been assigned to these vulnerabilities. A CVSS v2 base score of 5.0 has been assigned; the CVSS vector string is (AV:N/AC:L/Au:N/C:N/I:N/A:P). [c] VULNERABILITY DETAILS EXPLOITABILITY These vulnerabilities could be exploited remotely. EXISTENCE OF EXPLOIT No known public exploits specifically target these vulnerabilities. DIFFICULTY An attacker with a low skill would be able to exploit these vulnerabilities. MITIGATION Everest Software LLC has addressed these problems in the latest version (188.8.131.52) of PeakHMI. Users can check for a new version anytime from within the program and get an update if so desired. There is no charge for upgrades or updates. Users can also find the new version on the PeakHMI web site: http://peakhmi.com/ ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: Carefully monitor or block traffic to Port 49454. Disable the video server if it is not being used. This video server is only for remote HMI video support. (It is disabled by default on installation) 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 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 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. a. CWE-822: Untrusted Pointer Dereference, http://cwe.mitre.org/data/definitions/822.html, web site last accessed August 20, 2015. b. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-6454, NIST uses this advisory to create the CVE web site report. This web site will be active sometime after publication of this advisory. c. CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=AV:N/AC:L/Au:N/C:N/I:N/A:P, web site last accessed August 20, 2015. Contact Information For any questions related to this report, please contact ICS-CERT at: Email: firstname.lastname@example.org 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 email@example.com 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: firstname.lastname@example.org 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). 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