Connect with us

Hi, what are you looking for?

SecurityWeekSecurityWeek

ICS/OT

Advantech Patches Flaws in WebAccess SCADA Software

Taiwan-based industrial automation company Advantech has updated its WebAccess product to address a couple of vulnerabilities that could allow attackers to execute arbitrary code on affected systems.

Taiwan-based industrial automation company Advantech has updated its WebAccess product to address a couple of vulnerabilities that could allow attackers to execute arbitrary code on affected systems.

WebAccess is a browser-based software package for human-machine interfaces (HMI) and supervisory control and data acquisition (SCADA) systems. The product, formerly known as BroadWin WebAccess, is used worldwide in the commercial facilities, energy, critical manufacturing and government facilities sectors.

According to ICS-CERT, Zhou Yu of Acorn Network Security discovered that Advantech WebAccess is plagued by two medium severity vulnerabilities that can be exploited by a local attacker.

One of them, tracked as CVE-2016-4525, is related to the use of ActiveX controls, which are meant to be restricted, but are marked as “safe-for-scripting.” These types of flaws can allow an attacker to use potentially dangerous functionality via the web page that accesses the ActiveX control, which could lead to the execution of unauthorized code or commands. Microsoft provides a detailed description on how to ensure safe scripting for ActiveX controls.

The second flaw, identified as CVE-2016-4528, allows an attacker to trigger a buffer overflow by using a specially crafted DLL file. Buffer overflows usually lead to crashes or arbitrary code execution.

“These vulnerabilities are not exploitable remotely and cannot be exploited without user interaction. The exploit is only triggered when a local user runs the vulnerable application, which in certain scenarios can cause it to load a DLL file from an untrusted source,” ICS-CERT said in its advisory.

Advantech patched the vulnerabilities with the release of WebAccess 8.1_20160519, and Zhou Yu has confirmed that the update resolves the issues he discovered.

This is the second time Advantech patches WebAccess vulnerabilities this year. In January, ICS-CERT reported that the company had released an update to address more than a dozen flaws identified by several researchers. The list included cross-site scripting (XSS), unrestricted file upload, SQL injection, path traversal, improper access control, insecure storage of information, and memory corruption issues.

Advertisement. Scroll to continue reading.

Advantech attempted to fix the vulnerabilities with the release of WebAccess 8.1, but the Zero Day Initiative (ZDI) revealed in February that some of the flaws had not been patched properly.

Related Reading: Heartbleed, Other Flaws Found in Advantech ICS Gateways

Related Reading: Authentication Flaw Found in Advantech ICS Gateways

Written By

Eduard Kovacs (@EduardKovacs) is a managing editor at SecurityWeek. He worked as a high school IT teacher for two years before starting a career in journalism as Softpedia’s security news reporter. Eduard holds a bachelor’s degree in industrial informatics and a master’s degree in computer techniques applied in electrical engineering.

Click to comment

Trending

Daily Briefing Newsletter

Subscribe to the SecurityWeek Email Briefing to stay informed on the latest threats, trends, and technology, along with insightful columns from industry experts.

Join the session as we discuss the challenges and best practices for cybersecurity leaders managing cloud identities.

Register

SecurityWeek’s Ransomware Resilience and Recovery Summit helps businesses to plan, prepare, and recover from a ransomware incident.

Register

Expert Insights

Related Content

ICS/OT

The overall effect of current global geopolitical conditions is that nation states have a greater incentive to target the ICS/OT of critical industries, while...

CISO Strategy

Cybersecurity-related risk is a top concern, so boards need to know they have the proper oversight in place. Even as first-timers, successful CISOs make...

ICS/OT

Municipal Water Authority of Aliquippa in Pennsylvania confirms that hackers took control of a booster station, but says no risk to drinking water or...

ICS/OT

Mandiant's Chief analyst urges critical infrastructure defenders to work on finding and removing traces of Volt Typhoon, a Chinese government-backed hacking team caught in...

Cybercrime

Energy giants Schneider Electric and Siemens Energy confirm being targeted by the Cl0p ransomware group in the campaign exploiting a MOVEit zero-day.

ICS/OT

Wago has patched critical vulnerabilities that can allow hackers to take complete control of its programmable logic controllers (PLCs).

ICS/OT

Otorio has released a free tool that organizations can use to detect and address issues related to DCOM authentication.