CVE-1999-1065 in HotSync Manager
Summary
by MITRE
Palm Pilot HotSync Manager 3.0.4 in Windows 98 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via a long string to port 14238 while the manager is in network mode.
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Analysis
by VulDB Data Team • 04/19/2026
The vulnerability described in CVE-1999-1065 represents a critical buffer overflow flaw in the Palm Pilot HotSync Manager 3.0.4 software running on Windows 98 systems. This issue manifests when the HotSync Manager operates in network mode and receives malformed input data on TCP port 14238, which serves as the default communication port for Palm HotSync operations. The vulnerability stems from inadequate input validation and bounds checking within the application's network handling routines, creating a condition where an attacker can exploit the software's failure to properly validate incoming data lengths.
The technical nature of this flaw aligns with CWE-121, which describes heap-based buffer overflow conditions, and CWE-787, which covers out-of-bounds write operations. When a remote attacker sends a specially crafted long string to port 14238, the HotSync Manager's parsing routine fails to properly terminate or validate the input data, leading to memory corruption that can result in arbitrary code execution or system crash. The vulnerability operates at the application layer of the network stack, making it particularly dangerous as it can be exploited remotely without requiring local system access or authentication.
The operational impact of this vulnerability extends beyond simple denial of service to potentially enable full system compromise. When exploited successfully, the buffer overflow can overwrite critical memory segments including return addresses and function pointers, allowing an attacker to inject and execute malicious code with the privileges of the running HotSync Manager process. This presents a significant risk to mobile device synchronization environments where Palm Pilots were commonly used for business and personal data management, potentially exposing sensitive information and creating persistent backdoors on affected systems.
The attack vector for this vulnerability demonstrates characteristics consistent with ATT&CK technique T1203, which involves exploiting software vulnerabilities to gain remote code execution capabilities. The vulnerability affects systems running Windows 98 with Palm Pilot HotSync Manager 3.0.4 installed, making it particularly relevant to legacy enterprise environments that may have retained older Palm devices for critical operations. Organizations should implement network segmentation to block access to port 14238 from untrusted networks, disable network mode functionality when not required, and apply appropriate firewall rules to prevent unauthorized access to this communication port. Additionally, system administrators should consider implementing network monitoring to detect unusual traffic patterns on port 14238 that might indicate exploitation attempts, while also planning for system upgrades or replacement of legacy Palm synchronization infrastructure to eliminate this vulnerability from their operational environment.