CVE-2019-15167 : Vulnerability Insights and Analysis

The VRRP parser in tcpdump versions prior to 4.9.3 has a buffer over-read issue in the file print-vrrp.c:vrrp_print() when handling VRRP version 3. This vulnerability is distinct from CVE-2018-14463.

Understanding CVE-2019-15167

The vulnerability affects tcpdump versions before 4.9.3, leading to a buffer over-read issue in the VRRP parser.

What is CVE-2019-15167?

The VRRP parser in tcpdump has a buffer over-read in print-vrrp.c:vrrp_print() for VRRP version 3, different from CVE-2018-14463.

The Impact of CVE-2019-15167

This vulnerability could be exploited by attackers to potentially execute arbitrary code or cause a denial of service (DoS) condition.

Technical Details of CVE-2019-15167

The technical aspects of the vulnerability are as follows:

Vulnerability Description

The buffer over-read occurs in the VRRP parser in tcpdump versions prior to 4.9.3 when handling VRRP version 3.

Affected Systems and Versions

Affected Product: tcpdump
Affected Versions: Versions prior to 4.9.3

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious VRRP packets to trigger the buffer over-read issue.

Mitigation and Prevention

To address CVE-2019-15167, consider the following mitigation strategies:

Immediate Steps to Take

Update tcpdump to version 4.9.3 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

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

Patching and Updates

Apply patches and updates provided by the tcpdump project to fix the buffer over-read issue.