CVE-2006-5394 in Secure Desktop
Summary
by MITRE
The default configuration of Cisco Secure Desktop (CSD) has an unchecked "Disable printing" box in Secure Desktop Settings, which might allow local users to read data that was sent to a printer during another user's SSL VPN session.
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Analysis
by VulDB Data Team • 04/25/2026
The vulnerability identified as CVE-2006-5394 resides within the Cisco Secure Desktop implementation, a security solution designed to protect sensitive data during remote access sessions through SSL VPN connections. This flaw manifests in the default configuration settings where the "Disable printing" option remains unchecked, creating a critical security gap that undermines the isolation between concurrent user sessions. The vulnerability specifically affects environments where multiple users share the same physical workstation or where session switching occurs between different SSL VPN connections, as it allows unauthorized data access through the printing mechanism that should be properly isolated between sessions.
The technical exploitation of this vulnerability stems from the improper handling of printer session state management within the Secure Desktop framework. When the "Disable printing" checkbox is left unchecked, the system fails to properly isolate print job data between different user sessions, creating a scenario where a local user can potentially intercept and access print data that was generated during another user's SSL VPN session. This represents a fundamental failure in session boundary enforcement and data isolation principles that are critical for secure remote access solutions. The vulnerability operates at the application layer and demonstrates a clear lack of proper input validation and session state management, which aligns with CWE-665 improper initialization and CWE-284 improper access control.
The operational impact of this vulnerability extends beyond simple data exposure, as it creates a potential vector for information leakage and privilege escalation within secure environments. Local users who gain access to the system can exploit this weakness to read sensitive information that was processed through print functions during previous sessions, potentially including confidential documents, authentication credentials, or business-critical data. This vulnerability particularly affects organizations that rely heavily on SSL VPN solutions for remote access, where multiple users may share workstations or where session management is not properly enforced. The implications are significant in environments where compliance requirements mandate strict data isolation and where unauthorized access to print data could constitute a violation of data protection regulations.
Organizations should implement immediate mitigations including mandatory configuration reviews to ensure that the "Disable printing" option is properly enabled by default in all Cisco Secure Desktop deployments. System administrators must conduct comprehensive audits of existing configurations and enforce policy changes that automatically disable printing capabilities within SSL VPN sessions unless explicitly required and properly secured. The implementation of additional monitoring mechanisms to detect unauthorized access patterns and print job activities can help identify potential exploitation attempts. This vulnerability highlights the importance of secure default configurations and proper security hardening practices, aligning with ATT&CK technique T1078 legitimate credentials and T1566 credential access through compromised sessions. Regular security assessments and vulnerability scanning should be conducted to ensure that all SSL VPN implementations maintain proper session isolation and that default security settings are not inadvertently overridden by less secure configurations.