CVE-2018-19492 : Vulnerability Insights and Analysis

Gnuplot 5.2.5 has a vulnerability in cairo.trm that allows an attacker to exploit a buffer overflow. This CVE affects the pngcairo terminal when used as a backend.

Understanding CVE-2018-19492

This CVE involves a buffer overflow vulnerability in Gnuplot 5.2.5's cairo.trm, enabling attackers to input a large amount of data into the cairotrm_options function.

What is CVE-2018-19492?

The vulnerability arises from the absence of size verification for an argument passed to the "set font" function.
Specifically impacts the pngcairo terminal when utilized as a backend.

The Impact of CVE-2018-19492

Allows attackers to trigger a buffer overflow by inputting excessive data into the cairotrm_options function.

Technical Details of CVE-2018-19492

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

An issue in cairo.trm in Gnuplot 5.2.5 enables a buffer overflow through the cairotrm_options function.
Caused by a missing size check of an argument passed to the "set font" function.

Affected Systems and Versions

Product: n/a
Vendor: n/a
Versions: n/a

Exploitation Mechanism

Exploitation occurs when the pngcairo terminal is used as a backend.

Mitigation and Prevention

Learn how to mitigate and prevent the exploitation of CVE-2018-19492.

Immediate Steps to Take

Update Gnuplot to the latest version to patch the vulnerability.
Avoid using the pngcairo terminal until the issue is resolved.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement proper input validation to prevent buffer overflow vulnerabilities.

Patching and Updates

Stay informed about security advisories and updates from Gnuplot.