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AUSCERT External Security Bulletin Redistribution
Advisory (ICSA-19-157-01) Optergy Proton Enterprise Building
7 June 2019
AusCERT Security Bulletin Summary
Product: Optergy Proton
Operating System: Linux variants
Impact/Access: Administrator Compromise -- Remote/Unauthenticated
Cross-site Request Forgery -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Existing Account
CVE Names: CVE-2019-7279 CVE-2019-7278 CVE-2019-7277
CVE-2019-7276 CVE-2019-7275 CVE-2019-7274
Revision History: June 7 2019: Note thatthe product runs on Linux and in virtual machines.
June 7 2019: Initial Release
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Optergy Proton Enterprise Building Management System
Original release date: June 06, 2019
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1. EXECUTIVE SUMMARY
o CVSS v3 10.0
o ATTENTION: Exploitable remotely/low skill level to exploit
o Vendor: Optergy
o Equipment: Proton/Enterprise Building Management System
o Vulnerabilities: Information Exposure, Cross-site Request Forgery,
Unrestricted Upload of File with Dangerous Type, Open Redirect, Hidden
Functionality, Exposed Dangerous Method or Function, Use of Hard-coded
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to
achieve remote code execution and gain full system access.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Proton/Enterprise Building Management Systems, are
o Proton/Enterprise Versions 2.3.0a and prior
3.2 VULNERABILITY OVERVIEW
3.2.1 INFORMATION EXPOSURE CWE-200
The application suffers from username disclosure via its username reset
functionality. An attacker can enumerate and disclose all the valid users on
the system. Furthermore, when calling a certain page from a remote location,
the following internal information can be divulged for the current system:
Name, Internal IP Address, Netmask, Hostname, Gateway, DNS Server, and DNS
CVE-2019-7272 and CVE-2019-7277 have been assigned to these vulnerabilities. A
CVSS v3 base score of 5.3 has been calculated; the CVSS vector string is ( AV:N
3.2.2 CROSS-SITE REQUEST FORGERY (CSRF) CWE-352
The affected application allows users to perform certain actions via HTTP
requests without performing any validity checks to verify the requests. This
can be exploited to perform certain actions with administrative privileges if a
logged-in user visits a malicious website.
CVE-2019-7273 has been assigned to this vulnerability. A CVSS v3 base score of
5.0 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/
3.2.3 UNRESTRICTED UPLOAD OF FILE WITH DANGEROUS TYPE CWE-434
The vulnerability exists due to the absence of file extension validation when
uploading files through the badge image upload script. A remote and
unauthenticated attacker can upload files with arbitrary extensions into a
directory within application's web root and execute them with privileges of the
CVE-2019-7274 has been assigned to this vulnerability. A CVSS v3 base score of
9.9 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:L/UI:N/S:C/
3.2.4 URL REDIRECTION TO UNTRUSTED SITE ('OPEN REDIRECT') CWE-601
This vulnerability can be exploited to redirect a user to an arbitrary website;
e.g., when a user clicks a specially crafted link to the affected script hosted
on a trusted domain.
CVE-2019-7275 has been assigned to this vulnerability. A CVSS v3 base score of
3.1 has been calculated; the CVSS vector string is ( AV:N/AC:H/PR:N/UI:R/S:U/
3.2.5 HIDDEN FUNCTIONALITY CWE-912
Attackers can directly navigate to an undocumented backdoor script and gain
full system access. This allows unauthenticated code execution with highest
CVE-2019-7276 has been assigned to this vulnerability. A CVSS v3 base score of
10.0 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:C/
3.2.6 EXPOSED DANGEROUS METHOD OR FUNCTION CWE-749
Unauthenticated users may be able to use undeclared class functions to access
certain resources directly.
CVE-2019-7278 have been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
3.2.7 USE OF HARD-CODED CREDENTIALS CWE-798
Attackers can use CVE-2019-7278 to send unauthorized SMS messages to any phone
number depending on the stored credits to the hard-coded credentials in the
CVE-2019-7279 have been assigned to this vulnerability. A CVSS v3 base score of
7.3 has been calculated; the CVSS vector string is ( AV:N/AC:L/PR:N/UI:N/S:U/
o CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Government
o COUNTRIES/AREAS DEPLOYED: Worldwide
o COMPANY HEADQUARTERS LOCATION: United States
Gjoko Krstic of Applied Risk reported these vulnerabilities to Optergy.
Optergy recommends the following procedure to remediate these issues:
o Update Optergy server to Version 2.4.5 (or later) to remediate the issues
described in this advisory (Proton and Optergy Enterprise).
o Contact an Optergy Reseller who has access to this no charge software
o If unsure who to contact, send email to firstname.lastname@example.org
The latest Optergy software updates include important security updates
including enhancements to prevent unwanted intrusion. In addition to these
software updates, Optergy emphasizes it is important for users to ensure the
site network is also secure to add an extra layer of security. To keep the
Optergy system safer from unintended access, Optergy recommends the following:
o Close Port 22 or disable port forwarding to Optergy server for Port 22
(SSH). This port is only used for technical support to remotely diagnose
problems. If Port 22 is needed, open only for the duration of the support
activity. Default state should be closed.
o Use secure SSL (Secure Socket Layer) connections when crossing Internet,
this means using an enterprise LAN that has firewalls and routers to block
incoming traffic. Alternatively, deploy the Optergy OpenVPN, which is built
in and offers encrypted communication. Optergy supports SSL for encrypted
o Use strong passwords. A strong password has a minimum of 12 characters,
includes numbers, symbols, capital letters, lowercase letters, is not a
Dictionary word or combination of Dictionary words, and doesn't rely on
o Never share passwords. Concurrent logins can be prevented in web server and
o Use expiring passwords. Users of the system come and go, an expiring
password will at least keep out people who may be no longer authorized to
use the system.
o Always regularly update your software. Optergy updates always include
stability, security, and other enhancements to maximize performance and
reduce risk of downtime.
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
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.
NCCIC also recommends that users take the following measures to protect
themselves from social engineering attacks:
o Do not click web links or open unsolicited attachments in email messages.
o Refer to Recognizing and Avoiding Email Scams for more information on
avoiding email scams.
o Refer to Avoiding Social Engineering and Phishing Attacks for more
information on social engineering attacks.
No known public exploits specifically target these vulnerabilities.
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