CVE-2009-5008 in Secure Desktop
Summary
by MITRE
Cisco Secure Desktop (CSD), when used in conjunction with an AnyConnect SSL VPN server, does not properly perform verification, which allows local users to bypass intended policy restrictions via a modified executable file.
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Analysis
by VulDB Data Team • 01/04/2018
Cisco Secure Desktop represents a security mechanism designed to enforce strict policy controls on endpoint devices within corporate networks, particularly when integrated with AnyConnect SSL VPN solutions. The vulnerability exists within the verification process that occurs when CSD attempts to validate executable files before allowing their execution on the system. This flaw stems from insufficient validation mechanisms that fail to properly authenticate or verify the integrity of executable files, creating a pathway for malicious actors to circumvent established security policies. The vulnerability specifically affects systems where CSD operates in conjunction with AnyConnect VPN servers, making it particularly relevant in enterprise environments that rely on secure remote access solutions.
The technical implementation of this vulnerability exploits a weakness in the file verification logic within Cisco Secure Desktop's execution control framework. Local users can manipulate or replace executable files with modified versions that bypass the integrity checks performed by CSD, effectively allowing unauthorized code execution while maintaining the appearance of compliance with security policies. This type of flaw falls under the category of improper verification as defined by CWE-295, which specifically addresses issues where security controls fail to properly validate the authenticity or integrity of system components. The vulnerability demonstrates a critical failure in the principle of least privilege, as it allows local users to elevate their privileges beyond what should be permitted by the security architecture. The attack vector leverages the trust relationship between CSD and the executable files it manages, exploiting the gap in verification protocols to execute malicious code without proper authorization.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally undermines the security posture of organizations relying on Cisco Secure Desktop for endpoint protection. Attackers can use this vulnerability to bypass security controls that are specifically designed to prevent unauthorized software execution, potentially leading to complete system compromise and unauthorized access to sensitive corporate data. The vulnerability affects the integrity of the security framework by allowing malicious modifications to go undetected, which could enable further attacks such as credential theft, data exfiltration, or lateral movement within the network. Organizations using this technology face significant risk of insider threats or compromised endpoints, as the vulnerability does not require network-level access to exploit, making it particularly dangerous in environments where local access is already granted to users.
Mitigation strategies for this vulnerability should focus on implementing additional layers of security verification beyond the existing CSD controls. Organizations should consider deploying application whitelisting solutions to complement CSD's verification mechanisms, ensuring that only trusted executables can run on protected systems. Regular security updates and patches from Cisco should be implemented immediately upon availability, as this vulnerability represents a critical flaw in the core security architecture. System administrators should also implement monitoring solutions that can detect unauthorized executable modifications or suspicious file access patterns. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and persistence, and organizations should consider implementing defensive measures such as process monitoring, file integrity checking, and endpoint detection and response solutions to identify and prevent exploitation attempts. The vulnerability underscores the importance of defense in depth and the need for multiple verification mechanisms to protect against single points of failure in security architectures.