CVE-2001-1438 in Visor
Summary
by MITRE
Handspring Visor 1.0 and 1.0.1 with the VisorPhone Springboard module installed allows remote attackers to cause a denial of service (PalmOS crash and VisorPhone database corruption) by sending a large or crafted SMS image.
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Analysis
by VulDB Data Team • 11/17/2024
The vulnerability identified as CVE-2001-1438 represents a critical denial of service flaw affecting Handspring Visor devices running PalmOS version 1.0 and 1.0.1, specifically when the VisorPhone Springboard module is installed. This security weakness stems from inadequate input validation mechanisms within the SMS image processing functionality of the device's communication stack. The vulnerability operates at the application layer of the device's operating system, where unvalidated user input from incoming SMS messages is processed without proper boundary checking or sanitization. The flaw manifests when the device receives specially crafted or oversized SMS image data, which causes the PalmOS kernel to crash and results in corruption of the VisorPhone database. This represents a classic buffer overflow condition where the system attempts to process image data that exceeds allocated memory boundaries, leading to system instability and potential data loss. The vulnerability aligns with CWE-121, which describes buffer overflow conditions in stack-based buffers, and specifically relates to improper input validation within embedded mobile communication systems. From an operational perspective, this vulnerability creates significant risk for users who rely on their Handspring Visor devices for critical communication functions, as attackers can remotely disrupt service without requiring physical access to the device. The attack vector is particularly concerning because it operates over standard SMS protocols, making it accessible to adversaries who can simply send maliciously formatted messages to target devices. The impact extends beyond simple service disruption, as the VisorPhone database corruption can result in loss of contact information, call logs, and other critical personal data stored on the device. This vulnerability demonstrates the importance of proper input validation in embedded systems and highlights how legacy mobile platforms were particularly susceptible to such attacks due to limited security considerations in their initial design phases. The flaw also connects to ATT&CK technique T1499.001, which covers network denial of service attacks, and reflects the broader category of mobile device security vulnerabilities that were prevalent during the early 2000s era of handheld computing. The vulnerability underscores the critical need for robust input sanitization and memory management practices in mobile operating systems, particularly in communication modules that handle external data inputs. Organizations and individuals using these devices faced the risk of complete service interruption and data corruption, making this vulnerability particularly dangerous in environments where mobile communication reliability was essential. The issue also reveals the inherent security gaps in early mobile platforms that did not implement comprehensive protection mechanisms against malformed data inputs. Remediation efforts would require firmware updates from Handspring to address the buffer overflow conditions and implement proper input validation procedures for SMS image processing. The vulnerability serves as a historical example of how embedded systems security was often an afterthought in early mobile device development, leading to widespread exposure to similar classes of attacks in the mobile computing ecosystem.