CVE-2018-3891 Explained : Impact and Mitigation
Learn about CVE-2018-3891, a firmware downgrade vulnerability in Yi Home Camera 27US 1.8.7.0D. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A firmware downgrade vulnerability in the Yi Home Camera 27US 1.8.7.0D allows attackers to exploit a logic flaw by inserting a specially designed file via an SD card.
Understanding CVE-2018-3891
This CVE involves a firmware downgrade vulnerability in a specific version of the Yi Home Camera.
What is CVE-2018-3891?
The vulnerability allows attackers to trigger a firmware downgrade by inserting a specially crafted file using an SD card.
The Impact of CVE-2018-3891
- CVSS Base Score: 5.7 (Medium)
- Attack Vector: Physical
- Integrity Impact: High
- Confidentiality Impact: Low
- Availability Impact: Low
Technical Details of CVE-2018-3891
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability lies in the firmware update feature of Yi Home Camera 27US 1.8.7.0D, allowing a logic flaw to be exploited for firmware downgrades.
Affected Systems and Versions
- Affected Product: Yi Technology Home Camera 27US 1.8.7.0D
Exploitation Mechanism
Attackers can exploit the vulnerability by inserting a specifically designed file via an SD card.
Mitigation and Prevention
Protecting systems from CVE-2018-3891 requires immediate actions and long-term security practices.
Immediate Steps to Take
- Disable the firmware update feature if not essential
- Regularly monitor for unauthorized firmware changes
Long-Term Security Practices
- Keep firmware and software up to date
- Implement network segmentation to limit the impact of potential attacks
Patching and Updates
- Apply security patches provided by the vendor