CVE-2001-0157 in Palm
Summary
by MITRE
Debugging utility in the backdoor mode of Palm OS 3.5.2 and earlier allows attackers with physical access to a Palm device to bypass access restrictions and obtain passwords, even if the system lockout mechanism is enabled.
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Analysis
by VulDB Data Team • 05/30/2018
The vulnerability described in CVE-2001-0157 represents a critical security flaw in Palm OS versions 3.5.2 and earlier that exposes devices to unauthorized access through a debugging utility operating in backdoor mode. This issue specifically targets the device's security architecture by providing an unintended pathway for attackers who possess physical access to exploit the system's debugging functionality. The vulnerability exists within the Palm OS kernel implementation where a debugging utility remains accessible even when the device should be locked, creating a persistent security weakness that bypasses normal authentication mechanisms.
The technical flaw manifests through the presence of a debugging interface that can be activated via specific physical interactions with the device, typically involving hardware buttons or connection ports that are normally reserved for system maintenance or development purposes. This debugging utility operates in a backdoor mode that allows direct system access without proper authentication, effectively rendering the device's password protection and lockout mechanisms ineffective. The vulnerability stems from improper access control implementation within the Palm OS operating system, where privileged debugging functions are not adequately restricted from unauthorized physical access, creating a direct pathway for privilege escalation.
The operational impact of this vulnerability is significant for users of Palm OS devices, particularly those in corporate or sensitive environments where physical security may be compromised. An attacker with physical access to a device can exploit this backdoor to extract passwords, access confidential data, and potentially gain deeper system control without triggering any security alerts. This vulnerability undermines the fundamental security model of the device, as it allows bypass of both user-level authentication and system-level protection mechanisms that should prevent unauthorized access. The risk is particularly elevated in environments where devices are left unattended or where physical security controls are insufficient.
The vulnerability aligns with CWE-284, which addresses improper access control in software systems, and represents a classic case of insufficient privilege separation. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistence through system-level access. The attack vector requires physical access but can be executed with minimal technical expertise, making it particularly dangerous in scenarios where device security is assumed to be sufficient against unauthorized physical access. Organizations should implement comprehensive physical security controls alongside software-based protections, and device administrators should ensure that all Palm OS devices are updated to versions that properly disable or secure debugging interfaces. The vulnerability also highlights the importance of secure boot processes and the need for proper firmware validation to prevent unauthorized access to system-level debugging utilities.