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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.3011 Advisory (ICSMA-18-277-02) - Change Healthcare PeerVue Web Server 5 October 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Change Healthcare PeerVue Web Server Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-10624 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSMA-18-277-02 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSMA-18-277-02) Change Healthcare PeerVue Web Server Original release date: October 04, 2018 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 o CVSS v3 4.3 o ATTENTION: Exploitable on an adjacent network/low skill level to exploit o Vendor: Change Healthcare o Equipment: PeerVue Web Server o Vulnerability: Information Exposure Through an Error Message 2. RISK EVALUATION Successful exploitation of this vulnerability could allow an attacker to obtain technical information about the PeerVue Web Server, allowing an attacker to target a system for attack. 3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS Change Healthcare reports the vulnerability affects the following product: o PeerVue Web Server all versions up to 7.6.2 3.2 VULNERABILITY OVERVIEW 3.2.1 INFORMATION EXPOSURE THROUGH AN ERROR MESSAGE CWE-209 This vulnerability results from improper error handling in HTTP-based communications with the server, which could allow an attacker to obtain technical information. CVE-2018-10624 has been assigned to this vulnerability. A CVSS v3 base score of 4.3 has been calculated; the CVSS vector string is (AV:A/AC:L/PR:N/UI:N/S:U/C:L /I:N/A:N). 3.3 BACKGROUND o CRITICAL INFRASTRUCTURE SECTORS: Healthcare and Public Health o COUNTRIES/AREAS DEPLOYED: Worldwide o COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Dan Regalado of Zingbox reported this vulnerability to NCCIC. 4. MITIGATIONS Change Healthcare has been very responsive and aggressive in their efforts to mitigate the issue and released a patch to remediate the reported vulnerability. Users should contact the Change Healthcare Support team for information regarding the patch. NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should: o Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet. o Locate control system networks and remote devices behind firewalls, and isolate them from the business network. o 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 on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies. 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 this vulnerability, but information regarding this vulnerability has been publicly disclosed. 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? - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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 iQIVAwUBW7bFw2aOgq3Tt24GAQhfRA/+L0tn3/4aVcoH5ktSwsv7D8cpkaCFZqwp UMjUE2zYpW32AEg/1m2J+Ui7YZ9lxkL6PoUkYVvjX2SW0Bi8cZNG35qrRuunIk4n vHiB2rsVW50PHG5XJJQLNDtdPUpuSMC1sPI4ejBfZ2mVlBkCRZixe3VFD4jIc0oP AK+lJesMW4J0TVrpAsKeGaH6M+6hgNW0z8Xl5EUQkMVB3WqSSJhnNjZ6dIlSPnlA d+4YurthwKDVKDfyUmmWJ+XMhuVJIEvBSxhCbP6/VWV4kCGAzQSaOi4P60Y/d6vc RNH/k4iGXN325oS+k4dg1ekJVvcFvMkQezDvrDsXSdlrjwL/FlDMp/mh2gJUREbx EyrA9za/5RcerUZX5goxnc3Ez8btNjdD+8aQUt8S0kMi4i8JN2qLHADOR22LDNVo XId03QfoD0SKsc6TSplR0cg7KWhZBpY2jgEhE/WLIa9XJ8HoDUFQw9Pvlnw8dT0V VXtQqXIqWHMRtJ38fCnZRTkRuwivm2vcVl0/26B4IlaFMbivweYZY8H9N0+exdd6 VTM3eTqWxxW9XRbE2fZsBnrSe0bJQdZHBg71OfGa8Cnx4kRzXkbCIDXUQi6skCnC PRrxt/3uJSJ4bbPJoR55eaCBx2QWVNvlYSka2JX6k4A8B1ypovdK7jzbpy0TMZ/T k0leGnUF+YY= =V1rA -----END PGP SIGNATURE-----