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CVE-2019-1711 Explained : Impact and Mitigation

Learn about CVE-2019-1711, a vulnerability in Cisco IOS XR Software's Event Management Service daemon that allows remote attackers to trigger a denial of service attack. Find out the impacted systems, exploitation mechanism, and mitigation steps.

Cisco IOS XR gRPC Software Denial of Service Vulnerability

Understanding CVE-2019-1711

This CVE involves a vulnerability in Cisco IOS XR Software's Event Management Service daemon (emsd) that could allow a remote attacker to trigger a denial of service (DoS) attack on affected devices.

What is CVE-2019-1711?

The vulnerability in the Event Management Service daemon (emsd) of Cisco IOS XR Software allows an unauthenticated remote attacker to cause a DoS condition by sending unauthenticated gRPC requests to the device.

The Impact of CVE-2019-1711

The vulnerability can lead to a DoS scenario by crashing the emsd process on affected devices. It has a CVSS base score of 5.3, indicating a medium severity level.

Technical Details of CVE-2019-1711

Vulnerability Description

The vulnerability arises from inadequate management of gRPC requests in the Event Management Service daemon (emsd) of Cisco IOS XR Software.

Affected Systems and Versions

        Product: Cisco IOS XR Software
        Vendor: Cisco
        Versions Affected: Less than 6.5.1 (unspecified version type)

Exploitation Mechanism

        Attack Complexity: Low
        Attack Vector: Network
        Privileges Required: None
        User Interaction: None
        Scope: Unchanged
        Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Mitigation and Prevention

Immediate Steps to Take

        Apply the necessary patch provided by Cisco to address the vulnerability.
        Monitor network traffic for any suspicious activity targeting the emsd process.

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

        Cisco has released a fix for this vulnerability in Cisco IOS XR 6.5.1 and subsequent versions.

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