CVE-2018-19519 : Exploit Details and Defense Strategies

TCPDump 4.9.2 Stack-Based Buffer Over-Read Vulnerability

Understanding CVE-2018-19519

This CVE involves a vulnerability in the print_prefix function of print-hncp.c in TCPDump 4.9.2, potentially leading to a stack-based buffer over-read when processing manipulated packet data.

What is CVE-2018-19519?

This vulnerability arises due to the absence of initialization in the print_prefix function of print-hncp.c in TCPDump 4.9.2. Attackers could exploit this issue by sending crafted packet data, causing a stack-based buffer over-read.

The Impact of CVE-2018-19519

The vulnerability could be exploited by malicious actors to trigger a stack-based buffer over-read, potentially leading to information disclosure or denial of service.

Technical Details of CVE-2018-19519

Vulnerability Description

In TCPDump 4.9.2, a stack-based buffer over-read exists in the print_prefix function of print-hncp.c due to missing initialization when processing manipulated packet data.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Version: 4.9.2 (affected)

Exploitation Mechanism

The vulnerability can be exploited by sending manipulated packet data to the affected system, triggering a stack-based buffer over-read.

Mitigation and Prevention

Immediate Steps to Take

Apply the latest security patches provided by the vendor.
Monitor network traffic for any suspicious activities.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly update and patch all software and systems.
Conduct security training for employees to raise awareness of potential threats.
Utilize intrusion detection and prevention systems to enhance network security.

Patching and Updates

Ensure that TCPDump is updated to the latest version to mitigate the vulnerability and enhance system security.