24 October 2012
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1025 ICSA-12-297-02 KORENIX JETPORT 5600 SERIES HARD-CODED CREDENTIALS 24 October 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Korenix JetPort 5600 Publisher: US-CERT Operating System: Network Appliance Impact/Access: Root Compromise -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-4577 Original Bulletin: http://www.us-cert.gov/control_systems/pdf/ICSA-12-297-02.pdf Comment: This vulnerability can be remotely exploited without authentication and exploits are publicly available. - --------------------------BEGIN INCLUDED TEXT-------------------- ICS-CERT ADVISORY ICSA-12-297-02 KORENIX JETPORT 5600 SERIES HARD-CODED CREDENTIALS October 23, 2012 OVERVIEW This advisory provides mitigation details for a vulnerability that impacts the Korenix JetPort 5600. Independent researcher Reid Wightman of Digital Bond identified undocumented hard-coded root credentials [a] in the firmware of the Korenix JetPort 5600 system application without coordination with ICS-CERT, the vendor, or any other coordinating entity known to ICS-CERT. The Korenix JetPort is an industrial serial device server to control multiple serial devices over Ethernet. Successful exploitation of this vulnerability would allow attackers to exploit the product by using the hard-coded credential to log into the device with administrative privileges and gain access to the attached serial devices. Korenix has produced an upgraded firmware version that removes the accounts. This product is used worldwide, primarily in the communications and information technology sectors. This vulnerability could be exploited remotely. Exploits that target this vulnerability are known to be publicly available. AFFECTED PRODUCTS The following Korenix products are affected: * JetPort 5600, all versions. IMPACT Once access is gained, the attacker can read and write to the file system and reconfigure the device. Attackers may also have access to other serial devices that are attached to this product. 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 Korenix is a company based in Taiwan that was acquired by Beijer Electronics in 2010. Korenix maintains offices in several countries around the world, including the US, China, and Spain. The JetPort 5600 series is a 4-port redundant serial device server that provides users with four serial interfaces. The device can control up to four serial devices over the Ethernet. Users can configure the device over HTTPS/SSH or by using the Korenix JetPort Commander software. The affected products are industrial serial device servers used for SCADA systems. According to Korenix, [b] they are deployed across several sectors including the communications (50%) and information technology (50%) sectors. Korenix estimates that these products are used worldwide, but the deployment depth is currently unknown. VULNERABILITY CHARACTERIZATION VULNERABILITY OVERVIEW USE OF HARD-CODED CREDENTIALS [c] An attacker can log into the device using the hard-coded credentials that grant administrative access. Administrative credentials allow users to change device settings and read and write to the file system. This could result in a loss of confidentiality, integrity, or availability. CVE-2012-4577 [d] has been assigned to this vulnerability. A CVSS v2 base score of 10.0 has been assigned; the CVSS vector string is (AV:N/AC:L/Au:N/C:C/I:C/A:C). [e] VULNERABILITY DETAILS EXPLOITABILITY This vulnerability could be exploited remotely EXISTENCE OF EXPLOIT Exploits that target this vulnerability are publicly available. DIFFICULTY An attacker with a low skill would be able to exploit this vulnerability. MITIGATION Korenix has developed an upgraded version of firmware (v2.01) for the affected products. The upgraded firmware removes the root and guest accounts. The current version of OpenSSL (v0.9.8b) was also removed. The v2.01 firmware cannot be downgraded to v1.X.2 once upgraded. The Windows-based JetPort configuration tool, JetPort Commander, has also been upgraded to v3.0. The firmware upgrade can be downloaded from the Korenix software update Web site. [f] 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. Critical devices should not directly face 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 VPN is only as secure as the connected devices. ICS-CERT also provides a section for control systems security recommended practices on the US-CERT Web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. [g] ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to taking defensive measures. Additional mitigation guidance and recommended practices are publicly available in the ICS-CERT Technical Information Paper, ICS-TIP-12-146-01A - Cyber Intrusion Mitigation Strategies, [h] that is available for download from the ICS-CERT Web page (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 Scams [i] for more information on avoiding email scams. 3. Refer to Avoiding Social Engineering and Phishing Attacks [j] for more information on social engineering attacks. ICS-CERT CONTACT For any questions related to this report, please contact ICS-CERT at: Email: email@example.com Toll Free: 1-877-776-7585 For industrial control systems security information and incident reporting: www.ics-cert.org ICS-CERT continuously strives to improve its products and services. You can help by answering a short series of questions about this product at the following URL: https://forms.uscert.gov/ncsd-feedback/. DOCUMENT FAQ What is an ICS-CERT Advisory? An ICS-CERT Advisory is intended to provide awareness or solicit feedback from critical infrastructure owners and operators concerning ongoing cyber events or activity with the potential to impact critical infrastructure computing networks. When is vulnerability attribution provided to researchers? Attribution for vulnerability discovery is always provided to the vulnerability reporter unless the reporter notifies ICS-CERT that they wish to remain anonymous. ICS-CERT encourages researchers to coordinate vulnerability details before public release. The public release of vulnerability details prior to the development of proper mitigations may put industrial control systems and the public at avoidable risk. REFERENCES a. Korenix and ORing Use Crypto, http://www.digitalbond.com/2012/06/13/korenix-and-oring-insecurity/, Web site last accessed October 23, 2012. b. Korenix, http://www.korenix.com, Web site last accessed October 23, 2012. c. CWE, http://cwe.mitre.org/data/definitions/259.html, CWE-259: Use of Hard-coded Password, Web site last accessed October 23, 2012. d. NVD, http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-4577, NIST uses this advisory to create the CVE Web site report. This Web site will be active sometime after publication of this advisory. e. CVSS Calculator, http://nvd.nist.gov/cvss.cfm?version=2&vector=(AV:N/AC:L/Au:N/C:C/I:C/A:C), Web site last accessed October 23, 2012. f. Korenix JetPort Software Download, http://www.korenix.com/jetport-5201-firmware.htm, Web site last accessed October 23, 2012. g. CSSP Recommended Practices, http://www.us-cert.gov/control_systems/practices/Recommended_Practices.html, Web site last accessed October 23, 2012. h. Cyber Intrusion Mitigation Strategies, http://www.us-cert.gov/control_systems/pdf/ICS-TIP-12-146-01A.pdf, Web site last accessed October 23, 2012. i. Recognizing and Avoiding Email Scams, http://www.us-cert.gov/reading_room/emailscams_0905.pdf, Web site last accessed October 23, 2012. j. National Cyber Alert System Cyber Security Tip ST04-014, http://www.us-cert.gov/cas/tips/ST04-014.html, Web site last accessed October 23, 2012. - --------------------------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 firstname.lastname@example.org 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: email@example.com 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 iQIVAwUBUId2je4yVqjM2NGpAQIjEg//fcRVBUIr/fBQn9LRkmuLCiUVcHq4nTXM NZN1XYcXTdfKi+Hsr3jHGMxZFz60+1DXWIOZsO4byBK4F99PHxkUO0dkmpjxY5kk j+qYjjdYG1ils/L82PtagoCXICqG/kRgWFbsvGQG9QSMcg6IWuRriyp5J2CPFfuX bGD5aKmWYOepDoWcBS5nNbtSGvI0OnNeO3d2q9F29gwxwu6fIj9Fm/BH6ps8l85J iG/8X3u2qftlS4Osg3NPEN3mpf5EzvS16hdZfJWyVdMrqV+3HB+503WdXHlGFVIR NRSfRL4NnHqjky8/9qlr4dHGFwcz8hke+RBXQrT3XBCvk0ATAOhUATBzEaQeA2TO aSWhd7vDebHy6p9pkyVdUP8E6FPtWd3LhorvRPcSA2qDsHGVQDTMfZ5vhS1XpKHl bHL9ZkdC2/gVaSSEAeCZ5/p5WBtpKAukjK/b0ra1J+RFR6+FVsf6c/79ooG8fcR2 b45XWLFSekSMUMZOTDn8akk4rCNw/6SAA5tzVKHFd0XnLRsoKHTO4Lu9IbuQtSKJ pqsallWjnfxwaMQJBRnGSPsRz4zoCMmcODeOY+H/VCFiIg7vYfbAalpdZngWuSaj t38Oz0khYyYlodbaeTQg3d13yvEFjnZaLz1ruCa9VNjuMpWXGc/jWhPH4hMxWqDa MEUyoFqg1D8= =VRkG -----END PGP SIGNATURE-----