CVE-2020-37191 in Software Dialup Password Recovery
Summary
by MITRE • 02/11/2026
Top Password Software Dialup Password Recovery 1.30 contains a denial of service vulnerability that allows attackers to crash the application by overflowing input fields. Attackers can trigger the vulnerability by inserting a large 5000-character payload into the User Name and Registration Code input fields.
If you want to get the best quality for vulnerability data then you always have to consider VulDB.
Analysis
by VulDB Data Team • 02/11/2026
The vulnerability identified as CVE-2020-37191 affects Top Password Software Dialup Password Recovery version 1.30, representing a critical denial of service flaw that compromises application stability and availability. This vulnerability manifests through improper input validation mechanisms within the software's user interface, specifically targeting the User Name and Registration Code input fields. The flaw allows malicious actors to exploit buffer overflow conditions by injecting excessively large payloads of 5000 characters, which the application fails to handle gracefully. Such input handling deficiencies create a pathway for attackers to systematically disrupt service availability and potentially cause application crashes or system instability. The vulnerability directly relates to CWE-121, which describes stack-based buffer overflow conditions, and CWE-122, which addresses heap-based buffer overflow scenarios, indicating the software's inadequate memory management practices during input processing.
The operational impact of this vulnerability extends beyond simple application disruption, as it represents a fundamental weakness in the software's defensive architecture that could enable more sophisticated attack vectors. When attackers successfully exploit this vulnerability, they can cause the application to terminate unexpectedly or enter an unstable state, effectively rendering the password recovery functionality unusable for legitimate users. The specific nature of the attack vector - targeting input fields that are essential for application operation - means that even a single successful exploitation attempt can completely disable the software's core functionality. This denial of service condition affects system availability and can potentially impact business operations where password recovery services are critical for user access management and system administration tasks.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and sanitization mechanisms within the application's codebase. The software should enforce strict character limits on all input fields, particularly those used for user authentication and registration processes, with appropriate error handling to prevent buffer overflow conditions. Security patches should include immediate implementation of input length restrictions, with the application rejecting any input exceeding predetermined safe limits. Additionally, developers should employ memory-safe programming practices and consider implementing stack canaries or address space layout randomization to prevent exploitation. The vulnerability demonstrates the importance of adhering to secure coding standards such as those outlined in the OWASP Secure Coding Practices and aligns with ATT&CK technique T1499.004, which covers network denial of service attacks through resource exhaustion or application crashes. Organizations should also implement network segmentation and monitoring to detect anomalous input patterns that could indicate exploitation attempts, while maintaining regular software updates to address known vulnerabilities in third-party applications.