CVE-2020-24679 in Symphony Plus Operations
Summary
by MITRE • 12/23/2020
A S+ Operations and S+ Historian service is subject to a DoS by special crafted messages. An attacker might use this flaw to make it crash or even execute arbitrary code on the machine where the service is hosted.
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Analysis
by VulDB Data Team • 06/22/2026
This vulnerability represents a critical security flaw in S+ Operations and S+ Historian services that enables both denial of service attacks and potential remote code execution capabilities. The vulnerability stems from insufficient input validation mechanisms within the service's message processing pipeline, allowing attackers to craft specially formatted messages that trigger unexpected behavior in the application's handling routines. When these malicious messages are processed, they can cause the service to crash or enter an unstable state that may provide attackers with opportunities to execute arbitrary code on the underlying host system.
The technical implementation of this vulnerability typically involves exploiting buffer overflows, format string vulnerabilities, or improper exception handling within the service's communication protocols. Attackers can construct messages that exceed expected parameter limits or contain malformed data structures that cause the service to behave unpredictably during parsing or execution phases. These flaws align with common weakness enumerations such as CWE-121, which addresses stack-based buffer overflow conditions, and CWE-125, which covers out-of-bounds read vulnerabilities. The vulnerability may also manifest as CWE-78, representing improper neutralization of special elements used in command execution, if the service incorporates user-supplied data into system commands without proper sanitization.
The operational impact of this vulnerability extends beyond simple service disruption to potentially compromise entire host systems. When exploited successfully, attackers can gain unauthorized access to the machine hosting the vulnerable services, potentially escalating privileges and establishing persistent access points within the network infrastructure. This represents a significant risk for industrial control systems and operational technology environments where S+ Operations and S+ Historian services are commonly deployed. The attack surface is particularly concerning in environments where these services communicate over network protocols without adequate authentication or encryption mechanisms, creating opportunities for remote exploitation from external threat actors.
From an adversarial perspective, this vulnerability maps to several ATT&CK techniques including T1499 for endpoint disruption and T1059 for command and scripting interpreter usage. The attack chain typically begins with reconnaissance to identify vulnerable systems, followed by crafting and delivery of malicious payloads through the service's communication interfaces. Organizations should implement comprehensive network segmentation to isolate these services from critical infrastructure, deploy intrusion detection systems to monitor for anomalous message patterns, and establish robust patch management processes to address the underlying vulnerabilities. Additionally, implementing application-level firewalls and input validation controls can provide defense-in-depth measures that mitigate the risk of exploitation while maintaining service functionality. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in related systems and ensure that the implemented mitigations remain effective against evolving threat landscape developments.