ESB-2018.3066 - [Appliance] Xiongmai XMeye P2P Cloud Server: Multiple vulnerabilities 2018-10-10

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2018.3066
        Advisory (ICSA-18-282-06) Hangzhou Xiongmai Technology Co.,
                        Ltd XMeye P2P Cloud Server
                              10 October 2018

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Xiongmai XMeye P2P Cloud Server
Publisher:         ICS-CERT
Operating System:  Network Appliance
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
                   Unauthorised Access    -- Remote/Unauthenticated
Resolution:        Mitigation
CVE Names:         CVE-2018-17919 CVE-2018-17917 CVE-2018-17915

Original Bulletin: 
   https://ics-cert.us-cert.gov/advisories/ICSA-18-282-06

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Advisory (ICSA-18-282-06)

Hangzhou Xiongmai Technology Co., Ltd XMeye P2P Cloud Server

Original release date: October 09, 2018

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1. EXECUTIVE SUMMARY

  o CVSS v3 8.1
  o ATTENTION: Exploitable remotely/low skill level to exploit/information
    related to these vulnerabilities is publicly available
  o Vendor: Hangzhou Xiongmai Technology Co., Ltd
  o Equipment: XMeye P2P Cloud Server
  o Vulnerabilities: Predictable From Observable State, Hidden Functionality,
    Missing Encryption of Sensitive Data

2. RISK EVALUATION

Successful exploitation of these vulnerabilities could allow unauthorized
access to video feeds with the potential to modify settings, replace firmware,
and/or execute code.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

All products using XMeye P2P Cloud Server are affected. Hangzhou Xiongmai
Technology Co., Ltd acts primarily as an Original Equipment Manufacturer (OEM)
and sells few, if any, Xiongmai-branded products. Various vendors sell branded
devices with Hangzhou Xiongmai Technology Co., Ltd hardware/firmware inside.
Use the following methods to check the hardware/firmware:

  o Check if the product documentation/specifications mention the "XMEye"
    feature.
  o Access the err.htm page on the device (http://<Camera IP Address>/
    err.htm). Xiongmai or XMeye will be referenced.

3.2 VULNERABILITY OVERVIEW

3.2.1    PREDICTABLE FROM OBSERVABLE STATE CWE-341

An attacker may be able to use MAC addresses to enumerate potential Cloud IDs.
Using this ID, the attacker can discover and connect to valid devices using
one of the supported apps.

CVE-2018-17917 has been assigned to this vulnerability. A CVSS v3 base score
of 5.3 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U
/C:L/I:N/A:N).

3.2.2    HIDDEN FUNCTIONALITY CWE-912

An attacker could use an undocumented user account "default" with its default
password to login to XMeye and access/view video streams.

CVE-2018-17919 has been assigned to this vulnerability. A CVSS v3 base score
of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U
/C:L/I:L/A:N).

3.2.3    MISSING ENCRYPTION OF SENSITIVE DATA CWE-311

Not all device communication is encrypted. This includes the XMeye service and
firmware update communication. This could allow an attacker to eavesdrop on
video feeds, steal XMeye login credentials, or impersonate the update server
with malicious update code.

CVE-2018-17915 has been assigned to this vulnerability. A CVSS v3 base score
of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:N/S:U
/C:H/I:H/A:H).

3.3 BACKGROUND

  o CRITICAL INFRASTRUCTURE SECTORS: Multiple
  o COUNTRIES/AREAS DEPLOYED: Worldwide
  o COMPANY HEADQUARTERS LOCATION: China

3.4 RESEARCHER

Stefan Viehbock on behalf of SEC Consult Vulnerability Lab reported these
vulnerabilities to NCCIC.

4. MITIGATIONS

Hangzhou Xiongmai Technology Co., Ltd has not provided mitigations for these
vulnerabilities.

NCCIC recommends taking immediate action to change the admin account password
along with the undocumented "default" account password to minimize risk of
exploit.

NCCIC also recommends verifying the source of all firmware updates.

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.

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