CVE-2019-13520

Vulnerability

Multiple stack-based buffer overflow vulnerabilities exist in Fuji Electric Alpha5 Smart Loader versions prior to 4.2. The issues occur during parsing of specially crafted WPA and SDP project files. The software fails to properly validate the length of user-supplied data before copying it to fixed-length stack-based buffers [1][2][3].

Exploitation

Exploitation requires user interaction: the target must open a malicious .WPA or .SDP file (e.g., via email attachment or web download). An attacker can deliver the crafted file through social engineering [1][2]. No authentication is required; the overflow is triggered upon file parsing.

Impact

Successful exploitation allows an attacker to execute arbitrary code in the context of the current process. If the application runs with elevated privileges (e.g., Administrator), the attacker gains those privileges, leading to full compromise of confidentiality, integrity, and availability [1][2].

Mitigation

Fuji Electric has released version 4.2 of Alpha5 Smart Loader to address these vulnerabilities. Users should upgrade immediately (login required) [3]. As a workaround, avoid opening untrusted project files. No known public exploits exist; the vulnerability is not exploitable remotely [3].