CVE-2019-1900 : What You Need to Know

Cisco Integrated Management Controller Unauthenticated Denial of Service Vulnerability

Understanding CVE-2019-1900

This CVE involves a vulnerability in the web server of Cisco Integrated Management Controller (IMC) that could allow an unauthenticated remote attacker to crash the web server, leading to a denial of service (DoS) situation.

What is CVE-2019-1900?

The weakness in the web server of Cisco IMC allows an attacker to crash the web server process by sending a specially crafted HTTP request to specific endpoints within the affected software.

The Impact of CVE-2019-1900

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Availability Impact: High
This vulnerability could result in a DoS situation on the affected system due to insufficient validation of user input on the web interface.

Technical Details of CVE-2019-1900

The following technical details provide insight into the vulnerability and its implications:

Vulnerability Description

The vulnerability allows an unauthenticated attacker to crash the web server process.
It stems from inadequate validation of user-supplied input on the web interface.

Affected Systems and Versions

Affected Product: Cisco Unified Computing System (Management Software)
Vendor: Cisco
Affected Version: Less than 4.0(2f) (Custom version)

Exploitation Mechanism

An attacker can exploit this weakness by sending a specifically crafted HTTP request to certain endpoints within the affected software.
Successful exploitation could lead to a crash of the web server, potentially requiring physical access to restart the device.

Mitigation and Prevention

Taking immediate steps and implementing long-term security practices are crucial to mitigating the risks associated with CVE-2019-1900:

Immediate Steps to Take

Apply vendor-provided patches or updates to address the vulnerability.
Monitor network traffic for any suspicious activity targeting the affected systems.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Stay informed about security advisories from Cisco and apply relevant patches promptly to secure the affected systems.