All information products included in https://us-cert.cisa.gov/ics 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 https://us-cert.cisa.gov/tlp/.
ICS-CERT is aware of a public report of a cross-site scripting vulnerability with proof-of-concept (PoC) exploit code affecting the Advantech WebAccess, a supervisory control and data acquisition/human-machine interface (SCADA/HMI) product. According to the report, this cross-site scripting vulnerability could allow a remote authenticated attacker to execute arbitrary code in a user’s browser session.
ICS-CERT is issuing this alert to provide early notice of the report and identify baseline mitigations for reducing risks to these and other cybersecurity attacks.
This report was released by Antu Sanadi of SecPod Technologies without successful coordination of the vendor.
The report included vulnerability details and PoC exploit code for the following vulnerability:
|Vulnerability Type||Remotely Exploitable||Impact|
|Cross-Site Scripting||Yes||Execute unauthorized code; bypass protection mechanisms; read application data|
Please report any issues affecting control systems in critical infrastructure environments to ICS-CERT.
ICS-CERT released a follow-up advisory ICSA-13-225-01 Advantech WebAccess Cross-Site Scripting to the ICS-CERT Web site on August 13, 2013.
ICS-CERT recommends that users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:
- Minimize network exposure for all control system devices. Control system devices should not directly face the Internet.a
- Locate control system networks and devices behind firewalls, and isolate them from the business network.
- If remote access is required, employ secure methods, such as Virtual Private Networks (VPNs), recognizing that VPN is only as secure as the connected devices.
ICS-CERT reminds organizations to perform proper impact analysis and risk assessment prior to taking defensive measures.
ICS-CERT also provides a recommended practices section for control systems on the US-CERT Web site. Several recommended practices are available for reading or download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Organizations that observe any suspected malicious activity should follow their established internal procedures and report their findings to ICS-CERT for tracking and correlation against other incidents.
For any questions related to this report, please contact the CISA at:
Toll Free: 1-888-282-0870
CISA continuously strives to improve its products and services. You can help by choosing one of the links below to provide feedback about this product.