CVE-2012-4269 in eFront
Summary
by MITRE
Unrestricted file upload vulnerability in eFront 3.6.11 allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension via an attachment in a message.
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Analysis
by VulDB Data Team • 02/19/2019
The vulnerability CVE-2012-4269 represents a critical unrestricted file upload flaw in eFront version 3.6.11 that enables remote authenticated attackers to achieve arbitrary code execution through malicious file attachments. This vulnerability resides within the message attachment handling functionality of the eFront learning management system, creating a significant security risk for organizations relying on this platform for educational content management and communication.
The technical implementation of this vulnerability stems from inadequate input validation and file type checking mechanisms within the attachment processing pipeline. When authenticated users upload files through message attachments, the system fails to properly validate file extensions or content types, allowing attackers to bypass security controls and upload executable files with extensions such as .php, .asp, .jsp, or other server-side script extensions. This flaw operates under CWE-434 which specifically addresses unrestricted upload of file with dangerous type, making it particularly dangerous as it allows for the execution of malicious code on the target server.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to the compromised system. Once an attacker successfully uploads a malicious file, they can execute arbitrary commands on the server, potentially leading to complete system compromise, data exfiltration, and lateral movement within the network. The authenticated nature of the attack means that attackers do not need to perform additional reconnaissance or credential theft, as they can leverage existing user accounts to gain access to the vulnerable system. This vulnerability directly maps to ATT&CK technique T1190 which covers exploit public-facing application, and T1059 which covers command and scripting interpreter, as attackers can execute shell commands through the uploaded malicious files.
Organizations using eFront 3.6.11 should immediately implement multiple layers of mitigation strategies to address this vulnerability. The primary defense mechanism involves implementing strict file type validation and content checking within the attachment upload process, ensuring that only safe file extensions are accepted and that file contents are verified against known good patterns. Additionally, the upload directory should be configured with restricted permissions and separated from the web root to prevent direct execution of uploaded files. Network segmentation and monitoring of file upload activities can provide additional detection capabilities for potential exploitation attempts, while regular security updates and patches should be applied to address the underlying vulnerability. The implementation of web application firewalls and content security policies can further reduce the risk of exploitation by blocking suspicious file upload patterns and providing additional application-layer protection.