CVE-2018-5379 : Exploit Details and Defense Strategies

Prior to version 1.2.3, the Quagga BGP daemon (bgpd) has a vulnerability that can result in memory being double-freed when processing specific types of UPDATE messages. An exploit could lead to a denial of service or arbitrary code execution.

Understanding CVE-2018-5379

The Quagga BGP daemon (bgpd) prior to version 1.2.3 is susceptible to a memory double-free vulnerability, potentially enabling attackers to execute arbitrary code or cause denial of service.

What is CVE-2018-5379?

The vulnerability in Quagga's BGP daemon (bgpd) occurs when processing certain forms of UPDATE messages containing cluster-list and/or unknown attributes.

The Impact of CVE-2018-5379

CVSS Base Score: 7.5 (High)
Attack Vector: Network
Attack Complexity: High
Privileges Required: Low
Confidentiality, Integrity, and Availability Impact: High
Scope: Unchanged
User Interaction: None
Successful exploitation could lead to a denial of service or allow attackers to execute arbitrary code.

Technical Details of CVE-2018-5379

Vulnerability Description

The vulnerability in Quagga's BGP daemon (bgpd) allows memory double-free when processing specific types of UPDATE messages.

Affected Systems and Versions

Affected Product: bgpd
Vendor: Quagga
Affected Version: bpgd (custom version) less than 1.2.3

Exploitation Mechanism

Attackers can exploit this vulnerability by sending crafted UPDATE messages containing cluster-list and/or unknown attributes.

Mitigation and Prevention

Immediate Steps to Take

Update Quagga to version 1.2.3 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Refer to vendor advisories and security sources for patch availability and installation instructions.