CVE-2018-25289 in Softdisk
Summary
by MITRE • 04/27/2026
Softdisk 3.0.3 contains a buffer overflow vulnerability in the registration code dialog that allows local attackers to crash the application by supplying an oversized string. Attackers can trigger the vulnerability by entering a 6000-byte payload in the Registration Name field through the Help menu's Enter Registration Code dialog to cause a denial of service.
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Analysis
by VulDB Data Team • 09/02/2026
The software Softdisk version 3.0.3 is affected by a critical buffer overflow vulnerability located within its registration code handling logic, specifically triggered via the graphical user interface rather than network services or remote execution vectors. This flaw represents a classic memory corruption issue where the application fails to properly validate the length of input data before copying it into a fixed-size buffer on the stack or heap. The specific entry point for this vulnerability is the Enter Registration Code dialog accessible through the Help menu, which accepts user-supplied strings in the Registration Name field without implementing adequate bounds checking mechanisms. When an attacker provides a string that exceeds the allocated memory space, such as the documented 6000-byte payload, the excess data overwrites adjacent memory locations, leading to immediate application instability and termination.
From a technical perspective, this vulnerability is categorized under CWE-120, which denotes Buffer Copy without Checking Size of Input Classic Buffer Overflow. The root cause lies in the use of unsafe string manipulation functions or the absence of length validation prior to buffer assignment operations within the registration module. Because the input originates from a local user interaction via the application's own interface, this is classified as CWE-20 Improper Input Validation combined with CWE-787 Out-of-bounds Write. The lack of boundary checks allows arbitrary data to spill beyond the intended memory allocation, corrupting control flow or critical program state variables. This type of flaw is particularly dangerous in legacy applications where modern security mitigations such as stack canaries or address space layout randomization may not be fully implemented or effective against local exploitation attempts.
The operational impact of this vulnerability is primarily a denial of service condition for the affected application on the local system. By supplying an oversized string, a malicious actor with local access to the machine can cause Softdisk 3.0.3 to crash unexpectedly during normal usage scenarios involving software registration or validation processes. While the primary observed effect is application termination, buffer overflows in desktop applications often carry higher risks than simple crashes, as they may potentially allow for arbitrary code execution if the attacker can carefully craft the payload to overwrite return addresses or function pointers. However, based on current reports, the immediate consequence remains a stable denial of service that disrupts user productivity and requires application restart. This aligns with ATT&CK technique T1499 Endpoint Denial of Service, where an adversary uses resource exhaustion or instability to degrade system availability.
Mitigation strategies for this vulnerability focus primarily on patching and input validation hardening. The vendor should release a software update that implements strict length checks before processing the registration name string, ensuring it does not exceed the maximum allowed buffer size defined by the application architecture. For organizations unable to immediately apply patches, operational mitigations include restricting local user privileges or disabling access to the Help menu's registration dialog if feasible through group policy or configuration changes. Additionally, deploying endpoint detection and response solutions that monitor for abnormal memory allocation patterns or unexpected process terminations can help identify exploitation attempts in real time. Long-term remediation requires a comprehensive review of all input handling routines within the application to eliminate similar buffer overflow risks across other modules.