Schneider Electric U.motion Builder (Update A)
1. EXECUTIVE SUMMARY
CVSS v3 10.0
- ATTENTION: Remotely exploitable/low skill level to exploit. Public exploits are available.
- Vendor: Schneider Electric
- Equipment: U.motion Builder
- Vulnerabilities: SQL Injection, Path Traversal, Improper Authentication, Use of Hard-Coded Password, Improper Access Control, Denial of Service, Information Disclosure, Improper Input Validation, Improper Control of Generation of Code
2. UPDATE INFORMATION
This updated advisory is a follow-up to the original advisory titled ICSA-17-180-02 Schneider Electric U.motion Builder that was published June 29, 2017, on the NCCIC/ICS-CERT website.
3. RISK EVALUATION
A successful exploit of these vulnerabilities could allow an attacker to execute arbitrary commands or compromise the confidentiality, integrity, and availability of the system.
4. TECHNICAL DETAILS
4.1 AFFECTED PRODUCTS
The following U.motion Builder Software versions are affected:
- U.motion Builder Versions 1.2.1 and prior.
4.2 VULNERABILITY OVERVIEW
Unauthenticated users can use calls to various paths in order to perform arbitrary SQL statements against the underlying database.
The vulnerability exists within processing of track_import_export.php. The underlying SQLite database query is subject to SQL injection on the object_id input parameter.
The vulnerability exists within processing of track_getdata.php. The underlying SQLite database query is subject to SQL injection on the id input parameter.
The vulnerability exists within processing of editobject.php. The underlying SQLite database query is subject to SQL injection on the type input parameter.
The vulnerability exists within processing of loadtemplate.php. The underlying SQLite database query is subject to SQL injection on the tpl input parameter.
The vulnerability exists within processing of xmlserver.php. The underlying SQLite database query is subject to SQL injection on the id input parameter.
The vulnerability exists within processing of applets that are exposed on the web service. The underlying SQLite database query to determine whether a user is logged in is subject to SQL injection on the loginSeed parameter, which can be embedded in the HTTP cookie of the request.
The vulnerability exists within processing of nfcserver.php. The underlying SQLite database query is subject to SQL injection on the sessionid input parameter.
The vulnerability exists within processing of localize.php. The underlying SQLite database query is subject to SQL injection on the username input parameter.
Unauthenticated users can execute arbitrary code and exfiltrate files.
The vulnerability exists within css.inc.php. The ‘css’ parameter contains a directory traversal vulnerability.
The vulnerability exists within runscript.php applet. There is a directory traversal vulnerability in the processing of the ‘s’ parameter of the applet.
The vulnerability exists within processing of sendmail.php. The applet allows callers to select arbitrary files to send to an arbitrary email address.
The vulnerability exists within processing of editscript.php. A directory traversal vulnerability allows a caller with standard user privileges to write arbitrary php files anywhere in the web service directory tree.
The system includes a hard-coded valid session. If an attacker uses that session ID as part of the HTTP cookie of a web request, then authentication is bypassed.
The system comes with a system web access account hard-coded.
Improper handling of the system configuration can allow an attacker to execute arbitrary code under the context of root.
4.2.18 DENIAL OF SERVICE CWE-730
The system accepts reboot in session from unauthenticated user causing a denial of service.
The system returns more information than should be passed to an unauthenticated caller who might be an attacker.
The vulnerability exists within externalframe.php. Exception information is returned to the attacker that contains sensitive path information.
The vulnerability is due to insufficient handling of update_file request parameter on update_module.php. A remote, authenticated attacker can exploit this vulnerability by sending a crafted request to the target server.
Samba since Version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it.
- CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities, Critical Manufacturing, and Energy
- COUNTRIES/AREAS DEPLOYED: United States, Europe, and Asia
- COMPANY HEADQUARTERS LOCATION: France
rgod working with Trend Micro’s Zero Day Initiative, Constantin-Cosmin CRACIUN, and Schneider Electric identified these vulnerabilities.
Schneider Electric’s security notice SEVD-2017-178-01 is available at the following location:
Firmware update Version 1.3.4, which includes fixes for most of these vulnerabilities, has been released. It is highly recommended that U.motion Builder users apply the patch in a timely manner.
The firmware is available for download at:
U.motion server firmware update Version 1.3.4 is available for download at:
NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
- 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.
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.