CVE-2015-2876 in Storage
Summary
by MITRE
Unrestricted file upload vulnerability on Seagate GoFlex Satellite, Seagate Wireless Mobile Storage, Seagate Wireless Plus Mobile Storage, and LaCie FUEL devices with firmware before 3.4.1.105 allows remote attackers to execute arbitrary code by uploading a file to /media/sda2 during a Wi-Fi session.
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Analysis
by VulDB Data Team • 11/06/2024
The CVE-2015-2876 vulnerability represents a critical unrestricted file upload flaw affecting several Seagate and LaCie wireless storage devices including the GoFlex Satellite, Seagate Wireless Mobile Storage, Seagate Wireless Plus Mobile Storage, and LaCie FUEL models. This vulnerability stems from inadequate input validation mechanisms within the device firmware, specifically in the handling of file uploads to the /media/sda2 directory during active Wi-Fi sessions. The flaw exists in firmware versions prior to 3.4.1.105, making a significant number of devices susceptible to exploitation. The vulnerability is classified under CWE-434 which specifically addresses "Unrestricted Upload of File with Dangerous Type," indicating that the system fails to properly validate file types and content before accepting uploads. This weakness creates a pathway for remote attackers to bypass normal security controls and gain unauthorized access to the device's file system.
The technical exploitation of this vulnerability involves an attacker leveraging the device's web interface or network services to upload malicious files directly to the /media/sda2 directory without proper authorization or content validation. The upload functionality lacks proper file type checking, file size limitations, or execution permission controls that would normally prevent dangerous file types from being stored on the device. Once a malicious file is successfully uploaded to the designated directory, the attacker can potentially execute arbitrary code on the device, effectively gaining full control over the storage device's operations. This remote code execution capability allows adversaries to modify device configuration, install backdoors, or use the device as a pivot point for attacking other systems within the local network. The vulnerability is particularly concerning because it operates during active Wi-Fi sessions, meaning attackers can exploit it without requiring physical access to the device.
The operational impact of CVE-2015-2876 extends beyond simple unauthorized access, as it fundamentally compromises the security posture of wireless storage devices that are often deployed in environments where they serve as networked storage solutions. These devices frequently store sensitive personal or corporate data, making them attractive targets for attackers seeking to gain access to larger networks or extract valuable information. The vulnerability enables attackers to transform these storage devices into persistent threat vectors that can be used for various malicious activities including data exfiltration, establishing command and control channels, or using the devices as launch points for further attacks. The remote nature of the exploit means that attackers can target these devices from anywhere with network connectivity, significantly expanding the potential attack surface. This vulnerability aligns with ATT&CK technique T1059 which covers "Command and Scripting Interpreter" and T1078 which covers "Valid Accounts" as attackers can leverage compromised devices to maintain persistence and execute malicious commands.
Mitigation strategies for CVE-2015-2876 primarily focus on firmware updates and network segmentation. Organizations should immediately upgrade all affected devices to firmware version 3.4.1.105 or later, which includes proper input validation and file type restrictions. Network administrators should implement additional security controls such as firewall rules that restrict access to the device's web interface and network services. The principle of least privilege should be applied by ensuring that only authorized users can access the device's configuration interfaces. Regular security assessments should be conducted to verify that devices are running patched firmware versions and that no unauthorized modifications have occurred. Device administrators should also implement network monitoring to detect unusual file upload activities or unauthorized access attempts. The vulnerability demonstrates the importance of proper input validation and secure coding practices, particularly in embedded systems where security controls may be less robust than in traditional computing environments. This issue underscores the need for manufacturers to implement comprehensive security testing and validation processes before releasing firmware updates to ensure that file upload mechanisms are properly secured against malicious file injection attacks.