CVE-2018-17491 in EasyLobby Solo
Summary
by MITRE
EasyLobby Solo could allow a local attacker to gain elevated privileges on the system. By visiting the kiosk and typing "esc" to exit the program, an attacker could exploit this vulnerability to perform unauthorized actions on the computer.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 08/03/2023
The vulnerability identified as CVE-2018-17491 affects EasyLobby Solo software, a kiosk application designed for public access terminals. This system operates in environments where users interact through touchscreens or keyboard input, typically in libraries, government offices, or commercial establishments. The software's kiosk mode is intended to restrict user access to prevent unauthorized system modifications or malicious activities. However, a critical design flaw exists in the application's input handling mechanism that allows local attackers to bypass these security restrictions.
The technical exploitation of this vulnerability occurs through a simple yet effective method involving keyboard input manipulation. When an attacker accesses the kiosk system and presses the escape key combination, the application fails to properly validate this input sequence. This input bypasses the intended kiosk security controls and grants access to underlying system functions that should remain restricted to authorized users. The flaw represents a classic privilege escalation vulnerability where a local attacker can elevate their access level from restricted kiosk user to system administrator or full user privileges.
This vulnerability directly maps to CWE-284, which addresses improper access control in software applications. The weakness stems from inadequate input validation and insufficient privilege separation within the kiosk environment. The attack vector is particularly concerning because it requires minimal technical expertise and can be executed through simple keyboard interactions. The operational impact extends beyond individual system compromise as compromised kiosks can serve as entry points for broader network infiltration. Attackers could potentially use the elevated privileges to install malicious software, access sensitive data, or establish persistent backdoors within the organization's infrastructure.
The security implications of this vulnerability are significant for organizations relying on kiosk systems for public access. The attack scenario demonstrates how seemingly innocuous input handling can create critical security gaps in restricted environments. Organizations using EasyLobby Solo or similar kiosk software face potential data breaches, system compromise, and unauthorized access to sensitive information. The vulnerability also highlights the importance of proper application sandboxing and input validation in kiosk environments. According to ATT&CK framework, this vulnerability could enable techniques such as privilege escalation and persistence, making it a critical concern for security professionals. The exploitability factor is particularly high due to the simple nature of the attack and the common use of kiosk systems in public environments where physical access is often unmonitored.
Mitigation strategies should focus on immediate software updates from the vendor, implementation of additional input validation controls, and enhanced monitoring of kiosk systems. Organizations should consider network segmentation to limit the impact of any successful compromise and implement regular security assessments of kiosk environments. The vulnerability underscores the necessity of comprehensive security testing for applications operating in restricted access environments, particularly those handling sensitive data or providing public access to systems. Regular vulnerability assessments and penetration testing of kiosk systems can help identify similar flaws before they can be exploited by malicious actors.