CVE-2015-7269 in ST500LT015
Summary
by MITRE
Seagate ST500LT015 hard disk drives, when operating in eDrive mode on Lenovo ThinkPad W541 laptops with BIOS 2.21, allow physically proximate attackers to bypass self-encrypting drive (SED) protection by attaching a second SATA connector to exposed pins, maintaining an alternate power source, and attaching the data cable to another machine, aka a "Hot Unplug Attack."
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Analysis
by VulDB Data Team • 12/10/2019
The vulnerability described in CVE-2015-7269 represents a critical flaw in self-encrypting drive (SED) implementations within consumer and enterprise storage devices. This specific weakness affects Seagate ST500LT015 hard disk drives when operating in eDrive mode on Lenovo ThinkPad W541 laptops with BIOS version 2.21. The issue stems from inadequate physical security controls that fail to prevent unauthorized access to encrypted data through deliberate physical manipulation of the storage device. The vulnerability operates through a sophisticated attack vector that exploits the physical architecture of the drive and its connection mechanisms, creating a pathway for data extraction that bypasses the intended encryption protections.
The technical implementation of this vulnerability relies on the physical characteristics of the SATA interface and the power management design of the SED. Attackers can perform what is known as a "Hot Unplug Attack" by physically connecting a second SATA connector to exposed pins on the drive while maintaining an alternate power source. This method allows the attacker to access the drive's data cable and connect it to another machine, effectively creating a bypass mechanism that circumvents the encryption controls. The attack exploits the fact that the SED does not properly validate the integrity of its physical connections or power state transitions, enabling unauthorized data access through manipulation of the hardware interface. This technique falls under the category of physical attack vectors that target the fundamental assumptions about secure hardware operation and connection integrity.
The operational impact of this vulnerability extends far beyond simple data theft, representing a complete failure of the encryption security model that organizations rely upon for protecting sensitive information. When an attacker successfully executes this attack, they gain access to all data stored on the drive without requiring any knowledge of encryption keys or passwords, effectively neutralizing the encryption protection mechanism. The vulnerability is particularly concerning because it requires only physical proximity to the device and basic hardware manipulation skills, making it accessible to a wide range of threat actors. This attack can result in significant data breaches, regulatory compliance violations, and financial losses for organizations that depend on SEDs for protecting confidential information. The attack can be executed without specialized tools or advanced technical knowledge, making it a serious concern for enterprises and individuals alike.
The attack methodology aligns with several established threat patterns and techniques documented in cybersecurity frameworks including the attack techniques cataloged in the MITRE ATT&CK framework under the category of physical access and hardware manipulation. This vulnerability demonstrates a clear weakness in the hardware security model where the system assumes that proper physical connection integrity will be maintained, but fails to implement mechanisms to detect or prevent unauthorized physical manipulation. The issue also relates to the concept of hardware-based security failures as described in common weakness enumeration CWE-310, which addresses cryptographic weakness in hardware implementations. Organizations implementing SEDs must consider not just the software and protocol-level security measures but also the physical security controls that protect against such manipulation attacks.
Mitigation strategies for this vulnerability require a multi-layered approach that addresses both the immediate hardware security gaps and broader organizational security practices. Organizations should implement strict physical security controls including secure storage environments, restricted access areas, and monitoring systems to prevent unauthorized physical access to devices containing sensitive data. The implementation of additional hardware security features such as secure boot mechanisms, tamper-evident seals, and connection integrity verification should be considered as part of the overall security architecture. Network-level protections and encryption at rest should not be relied upon exclusively, as this vulnerability demonstrates that physical access can bypass even robust encryption implementations. Regular security assessments and vulnerability scanning should include physical security testing to identify similar weaknesses in other hardware components and systems. Additionally, manufacturers should implement more robust physical security controls in their SED designs to prevent unauthorized access through manipulation of power and data connections, ensuring that such attacks cannot be executed without detection or prevention mechanisms.