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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1128 Advisory (ICSA-17-124-02): Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras 5 May 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Dahua Technology Co., Ltd DVRs and IP Cameras Publisher: ICS-CERT Operating System: Network Appliance Impact/Access: Increased Privileges -- Existing Account Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-7927 CVE-2017-7925 Original Bulletin: https://ics-cert.us-cert.gov/advisories/ICSA-17-124-02 - --------------------------BEGIN INCLUDED TEXT-------------------- Advisory (ICSA-17-124-02) Dahua Technology Co., Ltd Digital Video Recorders and IP Cameras Original release date: May 04, 2017 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/. CVSS v3 9.8 ATTENTION: Remotely exploitable/low skill level to exploit. Public exploits are available. Vendor: Dahua Technology Co., Ltd Equipment: Digital Video Recorders and IP Cameras Vulnerabilities: Use of Password Hash Instead of Password for Authentication, Password in Configuration File AFFECTED PRODUCTS The following Dahua Technology Co., Ltd (Dahua) network cameras are affected: DH-IPC-HDBW23A0RN-ZS, DH-IPC-HDBW13A0SN, DH-IPC-HDW1XXX, DH-IPC-HDW2XXX, DH-IPC-HDW4XXX, DH-IPC-HFW1XXX, DH-IPC-HFW2XXX, DH-IPC-HFW4XXX, DH-SD6CXX, DH-NVR1XXX, DH-HCVR4XXX, and DH-HCVR5XXX. The following Dahua Digital Video Recorders (DVRs) are affected: DHI-HCVR51A04HE-S3, DHI-HCVR51A08HE-S3, and DHI-HCVR58A32S-S2. IMPACT Successful exploitation of these vulnerabilities could allow the attacker to obtain user credentials, including password hashes, and use these credentials to bypass authentication. MITIGATION Dahua has released updated firmware to mitigate these vulnerabilities. Updated software can be obtained from Dahua technical support or an authorized Dahua distributor. In addition, Dahua released the following security notifications for users: Cyber Vulnerability Affecting Certain Dahua IP Cameras and Recorders (March 6) (link is external) Cybersecurity Statement - March 6, 2017 (link is external) Cybersecurity Vulnerability Update - March 8, 2017 (link is external) Cyber Vulnerability Affecting Certain Dahua IP Cameras and Recorders (April 3) (link is external) Dahua's original notification specifies 11 affected models, but after initial testing, Dahua has identified additional series and models in the following security notification: Security Notification DHCC-201703-01 (link is external) NCCIC/ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of these vulnerabilities. Specifically, users should: Change default passwords immediately. 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. 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 ICS-CERT Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies, that is available for download from the ICS-CERT web site. 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. VULNERABILITY OVERVIEW USE OF PASSWORD HASH INSTEAD OF PASSWORD FOR AUTHENTICATION CWE-836 The use of password hash instead of password for authentication vulnerability was identified, which could allow a malicious user to bypass authentication without obtaining the actual password. CVE-2017-7927 has been assigned to this vulnerability. A CVSS v3 base score of 7.3 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L). PASSWORD IN CONFIGURATION FILE CWE-260 The password in configuration file vulnerability was identified, which could lead to a malicious user assuming the identity of a privileged user and gaining access to sensitive information. CVE-2017-7925 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). RESEARCHER Researcher Bashis disclosed these vulnerabilities without coordination with ICS-CERT. BACKGROUND Critical Infrastructure Sector(s): Commercial Facilities, Critical Manufacturing, Financial, Government Facilities, and Transportation Systems Countries/Areas Deployed: Worldwide Company Headquarters Location: China Contact Information For any questions related to this report, please contact ICS-CERT at: Email: ics-cert@hq.dhs.gov (link sends e-mail) 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 - --------------------------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). 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