CVE-2011-0724 in Live DVD
Summary
by MITRE
The Live DVD for Edubuntu 9.10, 10.04 LTS, and 10.10 does not correctly regenerate iTALC private keys after installation, which causes each installation to have the same fixed key, which allows remote attackers to gain privileges.
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Analysis
by VulDB Data Team • 10/17/2021
The vulnerability identified as CVE-2011-0724 affects the Live DVD distribution of Edubuntu operating systems version 9.10, 10.04 LTS, and 10.10. This issue stems from a critical flaw in the installation process where the iTALC (Interactive Teaching and Learning with Computers) private key generation mechanism fails to produce unique cryptographic keys for each system installation. The iTALC system is designed for classroom management and remote computer control, making this vulnerability particularly concerning for educational environments where multiple computers are managed centrally.
The technical flaw manifests in the improper implementation of cryptographic key generation during the Live DVD installation process. When users install Edubuntu from the Live DVD, the system should generate unique private keys for each installation to ensure secure remote access and authentication. However, due to a programming error in the installation script or configuration management, the same fixed private key is generated and used across all installations. This deterministic key generation violates fundamental cryptographic principles and creates a single point of failure that compromises the entire system security model.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass significant security risks in educational and enterprise environments. Remote attackers who obtain knowledge of this fixed private key can exploit it to gain unauthorized administrative privileges on any system that was installed using the affected Live DVD versions. This allows attackers to execute arbitrary code, access sensitive data, modify system configurations, and potentially establish persistent backdoors. The vulnerability affects the core authentication mechanism of the iTALC system, which is designed to provide secure remote access to classroom computers, making it particularly dangerous in school environments where multiple computers are interconnected and managed through centralized systems.
This vulnerability aligns with CWE-326, which describes the weakness of using weak encryption or cryptographic algorithms, and represents a failure in proper key management practices as outlined in NIST SP 800-57. The issue also maps to ATT&CK technique T1078.004, which covers legitimate credentials, and T1548.001, which involves abuse of privilege escalation techniques. The predictable key generation creates a situation where attackers can bypass authentication mechanisms entirely, effectively allowing them to assume the identity of authorized users without requiring additional credentials. Organizations using affected Edubuntu versions face significant risk of unauthorized system compromise, data breaches, and potential network infiltration through the compromised classroom management infrastructure.
The mitigation strategy involves immediate replacement of all affected installations with versions that properly implement cryptographic key generation. System administrators should verify that all iTALC configurations use unique, randomly generated keys for each installation. Additionally, organizations should implement network segmentation to limit the potential impact of a compromise, monitor for unauthorized access attempts, and conduct comprehensive security assessments of their classroom management systems. The vulnerability highlights the critical importance of proper cryptographic implementation in security-critical applications and demonstrates how seemingly minor implementation flaws can create significant security vulnerabilities in educational technology deployments.