CVE-2018-4837 in Server Basic
Summary
by MITRE
A vulnerability has been identified in TeleControl Server Basic < V3.1. An attacker with access to the TeleControl Server Basic's webserver (port 80/tcp or 443/tcp) could cause a Denial-of-Service condition on the web server. The remaining functionality of the TeleControl Server Basic is not affected by the Denial-of-Service condition.
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Analysis
by VulDB Data Team • 02/02/2023
The vulnerability identified as CVE-2018-4837 affects TeleControl Server Basic versions prior to V3.1, representing a significant security weakness that could be exploited by remote attackers. This vulnerability manifests as a denial-of-service condition that can be triggered through the web server interface, specifically targeting ports 80/tcp and 443/tcp which are standard for http and https communications. The attack vector requires minimal privileges as an attacker only needs access to the web server interface to execute the exploit successfully, making this vulnerability particularly concerning for environments where the web server is exposed to untrusted networks or users.
The technical flaw in this vulnerability stems from insufficient input validation or improper handling of specific requests sent to the TeleControl Server Basic web interface. When an attacker crafts malicious requests and sends them to the vulnerable server, the system fails to properly process these inputs, leading to a denial-of-service condition that affects the web server's ability to respond to legitimate requests. This type of vulnerability typically occurs when the application does not adequately sanitize user inputs or when buffer overflows, stack corruption, or other memory management issues are present in the web server component. The vulnerability is classified under CWE-400, which encompasses issues related to resource exhaustion and denial-of-service conditions, and aligns with ATT&CK technique T1499.004 for network denial-of-service attacks.
The operational impact of this vulnerability extends beyond simple service disruption as it can effectively render the web server component of the TeleControl Server Basic unusable for legitimate users while leaving other system functionalities intact. This selective impact means that while the web interface becomes unavailable, the underlying TeleControl Server Basic services may continue operating, though the web-based management and monitoring capabilities are completely compromised. The vulnerability affects the availability aspect of the CIA triad, specifically targeting the system's ability to provide services to authorized users. Organizations relying on TeleControl Server Basic for remote monitoring and management may experience complete loss of web-based administrative access, forcing them to rely on alternative access methods that may be less convenient or secure.
Organizations should prioritize immediate remediation by upgrading to TeleControl Server Basic version V3.1 or later, which contains the necessary patches to address this vulnerability. Network segmentation should be implemented to limit access to the affected web server ports, ensuring that only authorized personnel can reach the vulnerable interface. Additionally, implementing web application firewalls and intrusion detection systems can help detect and block malicious requests before they can trigger the denial-of-service condition. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other network components, as this vulnerability demonstrates the importance of maintaining up-to-date software versions and proper input validation practices. The remediation process should also include monitoring for any signs of exploitation attempts and establishing incident response procedures specifically designed to address denial-of-service attacks targeting web server components.