Delta Electronics DIALink
Plan Patch8.8ICS-CERT ICSA-21-294-02Oct 21, 2021
Attack VectorAdjacent
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary
DIALink versions 1.2.4.0 and earlier contain multiple vulnerabilities including improper access controls, cross-site scripting, insecure direct object references, missing encryption, unrestricted file uploads, and insufficient file permissions. Successful exploitation could allow unauthorized information access, remote code execution, privilege escalation, complete system takeover, and installation of malicious files in the application directory. Delta Electronics is working on an update but no fix is currently available.
What this means
What could happen
An attacker could gain unauthorized access to sensitive data, execute arbitrary code on the DIALink system, escalate privileges, and take complete control of the host machine, potentially disrupting critical delta automation and process control functions.
Who's at risk
DIALink is used by automation engineers and process control operators at industrial facilities for remote monitoring and control. Any organization using Delta Electronics DIALink for plant operations or process management should prioritize this vulnerability, especially if the system is connected to or accessible from networked environments.
How it could be exploited
An attacker with network access to a system running DIALink could exploit one or more of these vulnerabilities to read sensitive data or upload malicious files without authentication. The attacker could then escalate privileges and execute commands on the affected system to achieve full system compromise and control of any connected industrial processes.
Prerequisites
- Network access to the system running DIALink
- DIALink version 1.2.4.0 or earlier installed
- No valid credentials required for initial exploitation
No patch availableMultiple critical vulnerability types (code execution, privilege escalation, data exposure)No authentication required for some exploitsAffects system administration and process control capabilities
Exploitability
Low exploit probability (EPSS 0.4%)
Affected products (1)
ProductAffected VersionsFix Status
DIALink:≤ 1.2.4.0No fix (EOL)
Remediation & Mitigation
0/6
Do now
0/3HARDENINGDo not expose DIALink systems to the Internet or untrusted networks
HARDENINGIsolate DIALink systems from the business network using firewalls and network segmentation
WORKAROUNDIf remote access is required, implement a VPN with current security patches and strong authentication controls
Mitigations - no patch available
0/3DIALink: has reached End of Life. The vendor will not release a patch. Apply the following compensating controls:
HARDENINGMonitor for and report any suspected malicious activity targeting DIALink systems to CISA
HARDENINGImplement network intrusion detection and monitoring for DIALink systems per ICS-TIP-12-146-01B
HARDENINGApply defense-in-depth strategies as documented in Delta's recommended practices
CVEs (10)
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API:
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