Moxa IKS and EDS ICSA-19-057-01 Multiple Security Vulnerabilities

Description

Moxa IKS and EDS are prone to following security vulnerabilities: 1. A cross-site-scripting vulnerability 2. Multiple stack-based buffer-overflow vulnerabilities 3. A security vulnerability 4. An information disclosure vulnerability 5. A cross-site request-forgery vulnerability 6. Multiple denial-of-service vulnerabilities 7. A security-bypass vulnerability 8. An authentication bypass vulnerability An attacker may leverage these issues to view arbitrary files within the context of the web server, execute arbitrary script code in the browser of the victim in the context of the affected site, steal cookie-based authentication credentials, gain access to sensitive information, compromise the application, access or modify data, reboot or crash of the application resulting in a denial of service condition, bypass security restrictions, or execute arbitrary code. This may lead to other vulnerabilities. The following Moxa products and versions are affected: IKS-G6824A series versions 5.6 and prior, EDS-405A series versions 3.8 and prior, EDS-408A series versions 3.8 and prior, and EDS-510A series versions 3.8 and prior.

Technologies Affected

• Moxa EDS-405A 3.8
• Moxa EDS-408A 3.8
• Moxa EDS-510A 3.8
• Moxa IKS-G6824A 4.5
• Moxa IKS-G6824A 5.6

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, run all applications with the minimal amount of privileges required for functionality.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include suspicious URI sequences.

Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.

Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as nonexecutable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploit attempts of memory-corruption vulnerabilities.

Updates are available. Please see the references or vendor advisory for more information