Rewterz Threat Advisory – ICS: Multiple WebAccess/SCADA Vulnerabilities

Severity

High

Analysis Summary

CVE-2021-22676

UserExcelOut.asp within WebAccess/SCADA is vulnerable to cross-site scripting (XSS), which could allow an attacker to send malicious JavaScript code. This could result in hijacking of cookie/session tokens, redirection to a malicious webpage, and unintended browser action.

CVE-2021-22674

The affected product is vulnerable to a relative path traversal condition, which may allow an attacker access to unauthorized files and directories.

CVE-2021-32943

The affected product is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code.

Impact

• Code Execution
• Unauthorized Access
• Information Theft

Affected Vendors

Advantech

Affected Products

• WebAccess/SCADA versions prior to 8.4.5
• WebAccess/SCADA versions prior to 9.0.1

Remediation

Upgrade to the latest version of WedAccess/SCADA (9.0.1 or later ), and refer to the vendor website for more information on affected products, patches, and upgrades.

https://us-cert.cisa.gov/ics/advisories/icsa-21-217-04