CVE-2019-1736 Explained : Impact and Mitigation
Learn about CVE-2019-1736, a vulnerability in Cisco Identity Services Engine Software that allows attackers to load compromised software by bypassing UEFI Secure Boot checks. Find mitigation steps and impact details here.
Cisco Identity Services Engine Software has a vulnerability that allows an authenticated, physical attacker to load compromised software on affected devices by bypassing UEFI Secure Boot validation checks.
Understanding CVE-2019-1736
This CVE involves a security vulnerability in Cisco UCS C-Series Rack Servers that enables attackers to load compromised software images on devices.
What is CVE-2019-1736?
The vulnerability allows attackers to bypass UEFI Secure Boot validation checks by exploiting inadequate validation of server firmware upgrade images.
The Impact of CVE-2019-1736
- Attack Complexity: Low
- Attack Vector: Physical
- Confidentiality Impact: High
- Integrity Impact: High
- Privileges Required: High
- Availability Impact: High
Technical Details of CVE-2019-1736
This section provides detailed technical information about the vulnerability.
Vulnerability Description
The vulnerability arises from inadequate validation of server firmware upgrade images, allowing attackers to load compromised software images.
Affected Systems and Versions
- Product: Cisco Identity Services Engine Software
- Vendor: Cisco
- Affected Version: n/a
Exploitation Mechanism
Attackers must install a server firmware version that permits disabling UEFI Secure Boot to exploit the vulnerability.
Mitigation and Prevention
Steps to address and prevent exploitation of the vulnerability.
Immediate Steps to Take
- Apply patches provided by Cisco promptly.
- Monitor for any unauthorized changes to server firmware.
Long-Term Security Practices
- Regularly update and patch server firmware.
- Implement secure boot configurations to prevent unauthorized software loading.
Patching and Updates
- Regularly check for and apply firmware updates and patches provided by Cisco.