CVE-2021-42849 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-42849, a vulnerability in certain Lenovo Personal Cloud Storage devices due to weak default passwords, allowing unauthorized access to attackers physically. Learn about affected systems and versions, mitigation steps, and how to secure your devices.
A weak default password for the serial port in certain Lenovo Personal Cloud Storage devices could lead to unauthorized access.
Understanding CVE-2021-42849
What is CVE-2021-42849?
A weak default password for the serial port in specific Lenovo Personal Cloud Storage devices could allow unauthorized access to attackers with physical access.
The Impact of CVE-2021-42849
The vulnerability has medium severity, with high impacts on confidentiality, integrity, and availability of affected devices.
Technical Details of CVE-2021-42849
A unique identifier for a security vulnerability found in Lenovo Personal Cloud Storage devices.
Vulnerability Description
A weak default password for the serial port in Lenovo Personal Cloud Storage devices can be exploited by attackers with physical access.
Affected Systems and Versions
- Lenovo Personal Cloud Storage A1, T1, X1, T2, T2Pro
- Versions less than 5.3.6.a1, 5.3.6.t1, 5.3.8.x1, 5.3.8.t2, 5.3.7.t2-pro
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Physical
- Privileges Required: None
- User Interaction: None
- Scope: Unchanged
Mitigation and Prevention
Update to the firmware versions specified in LEN-73439 to address the vulnerability.
Immediate Steps to Take
- Apply firmware update listed in LEN-73439.
Long-Term Security Practices
- Avoid using default passwords.
- Implement strong, unique passwords for all devices.
- Regularly monitor and update firmware.
- Restrict physical access to devices.
- Educate users on secure password practices.
Patching and Updates
Update to Lenovo Personal Cloud Storage device firmware as per LEN-73439.