CVE-2020-27827 : Vulnerability Insights and Analysis

A flaw in multiple versions of OpenvSwitch allows specially crafted LLDP packets to cause memory loss, potentially leading to a denial of service.

Understanding CVE-2020-27827

What is CVE-2020-27827?

This CVE identifies a vulnerability in OpenvSwitch that can be exploited by malicious LLDP packets to trigger memory allocation issues, potentially resulting in a denial of service.

The Impact of CVE-2020-27827

The primary risk posed by this vulnerability is to system availability, as attackers can disrupt services by exploiting the memory allocation flaw.

Technical Details of CVE-2020-27827

Vulnerability Description

The vulnerability arises from the mishandling of specific optional TLVs in LLDP packets, leading to memory loss during data allocation.

Affected Systems and Versions

Vendor: n/a
Affected Product: lldp/openvswitch
Versions: lldpd 1.0.8, openvswitch 2.14.1, 2.13.2, 2.12.2, 2.11.5, 2.10.6, 2.9.8, 2.8.10, 2.7.12, 2.6.9

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted LLDP packets to the affected systems, triggering memory allocation issues and potentially causing a denial of service.

Mitigation and Prevention

Immediate Steps to Take

Apply vendor patches and updates promptly to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious LLDP packet activity.

Long-Term Security Practices

Regularly update and patch all software and systems to address known vulnerabilities.
Conduct security assessments and penetration testing to identify and remediate weaknesses.
Educate network administrators and users on best practices for network security.

Patching and Updates

It is crucial to apply the latest patches and updates provided by the vendor to address the vulnerability in OpenvSwitch.