CVE-2018-7509 in WPLSoft
Summary
by MITRE
WPLSoft in Delta Electronics versions 2.45.0 and prior writes data from a file outside the bounds of the intended buffer space, which could cause memory corruption or may allow remote code execution.
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Analysis
by VulDB Data Team • 02/02/2020
The vulnerability identified as CVE-2018-7509 affects WPLSoft software developed by Delta Electronics, specifically versions 2.45.0 and earlier. This issue represents a critical buffer overflow condition that occurs when the software processes data from external files without proper bounds checking mechanisms. The flaw exists within the file handling routines where the application fails to validate the size of incoming data before copying it into fixed-size memory buffers. This type of vulnerability falls under the CWE-121 category of Stack-based Buffer Overflow, which is classified as a fundamental memory safety issue in software development practices.
The technical implementation of this vulnerability stems from improper input validation within the WPLSoft application's data processing pipeline. When the software encounters external files containing malformed or oversized data structures, it attempts to copy this information into predetermined buffer locations without adequate size verification. This behavior creates a condition where data can overwrite adjacent memory locations, potentially corrupting program execution flow or allowing attackers to inject malicious code. The vulnerability is particularly concerning because it enables remote code execution, meaning an attacker could potentially exploit this flaw from a remote location without requiring physical access to the system.
Operational impact assessment reveals that systems running affected versions of WPLSoft in Delta Electronics are highly susceptible to unauthorized access and system compromise. The remote code execution capability provides attackers with the ability to gain full control over affected systems, potentially leading to data breaches, system downtime, or further lateral movement within network environments. Organizations utilizing this software in industrial control systems or manufacturing environments face significant operational risks, as these systems often operate continuously and may not have regular patching cycles. The vulnerability's exploitability is further enhanced by the fact that it can be triggered through simple file manipulation, making it accessible to attackers with minimal technical expertise.
Security mitigations for CVE-2018-7509 primarily focus on immediate remediation through software updates and patches provided by Delta Electronics. Organizations should prioritize updating to versions of WPLSoft that address this buffer overflow vulnerability, as these updates typically include proper bounds checking and input validation mechanisms. Network segmentation and access controls should be implemented to limit exposure of affected systems to untrusted networks or users. Additional protective measures include regular security assessments, monitoring for anomalous file access patterns, and implementing intrusion detection systems that can identify potential exploitation attempts. The vulnerability aligns with several ATT&CK techniques including T1059 for command and scripting interpreter and T1070 for indicator removal, as attackers may attempt to establish persistence or cover their tracks after successful exploitation. Organizations should also consider implementing application whitelisting policies to prevent unauthorized software execution and maintain detailed audit logs to detect potential exploitation attempts.