CVE-2019-1880 : What You Need to Know

A weakness has been identified in the BIOS upgrade tool used for Cisco Unified Computing System (UCS) C-Series Rack Servers, allowing a local attacker to install manipulated BIOS firmware on a vulnerable device.

Understanding CVE-2019-1880

This CVE involves a vulnerability in the BIOS upgrade utility of Cisco UCS C-Series Rack Servers, enabling attackers to bypass firmware signature verification and install compromised BIOS firmware.

What is CVE-2019-1880?

The vulnerability stems from inadequate validation of the firmware image file, which can be exploited by running the BIOS upgrade tool with specific options.

The Impact of CVE-2019-1880

CVSS Base Score: 4.4 (Medium Severity)
Attack Vector: Local
Integrity Impact: High
Privileges Required: High
The vulnerability does not impact availability or confidentiality.
No known public announcements or malicious use of the vulnerability.

Technical Details of CVE-2019-1880

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The flaw allows a local attacker with authentication to install compromised BIOS firmware on a vulnerable device by evading the firmware signature-verification process.

Affected Systems and Versions

Affected Product: Cisco Unified Computing System (Managed)
Vendor: Cisco
Affected Version: Less than 4.0(4c)

Exploitation Mechanism

Attacker requires local access and authentication to exploit the vulnerability.
By running the BIOS upgrade tool with specific options, the attacker can install manipulated BIOS firmware.

Mitigation and Prevention

Protecting systems from CVE-2019-1880 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Monitor Cisco's security advisories for any new information or patches related to this vulnerability.

Long-Term Security Practices

Implement the principle of least privilege to restrict access to critical system components.
Regularly review and update BIOS firmware to mitigate potential vulnerabilities.

Patching and Updates

Regularly check for firmware updates and apply them as soon as they are available to address known vulnerabilities.