CVE-2018-19491 Explained : Impact and Mitigation
Learn about CVE-2018-19491, a buffer overflow vulnerability in Gnuplot version 5.2.5. Understand the impact, affected systems, exploitation mechanism, and mitigation steps.
A vulnerability was identified in post.trm in Gnuplot version 5.2.5, allowing an attacker to trigger a buffer overflow. This flaw arises from the absence of size verification for an argument passed to the 'set font' function.
Understanding CVE-2018-19491
This CVE entry describes a security vulnerability in Gnuplot version 5.2.5 that enables a buffer overflow attack.
What <b>is CVE--2018-19491?</b>
The vulnerability in post.trm in Gnuplot version 5.2.5 allows attackers to exploit a buffer overflow by providing excessive data to the PS_options function. The root cause is the lack of size verification for an argument passed to the 'set font' function.
The Impact of CVE-2018-19491
This vulnerability affects the Gnuplot postscript terminal when used as a backend, potentially leading to unauthorized access or denial of service attacks.
Technical Details of CVE-2018-19491
This section provides detailed technical information about the CVE.
Vulnerability Description
The vulnerability in post.trm in Gnuplot version 5.2.5 enables attackers to trigger a buffer overflow by supplying a large amount of data to the PS_options function due to the absence of size verification for an argument passed to the 'set font' function.
Affected Systems and Versions
- Gnuplot version 5.2.5
Exploitation Mechanism
- Attackers exploit the vulnerability by providing excessive data to the PS_options function, causing a buffer overflow.
Mitigation and Prevention
Protect your systems from CVE-2018-19491 with the following steps:
Immediate Steps to Take
- Update Gnuplot to a patched version that addresses the buffer overflow vulnerability.
- Monitor for any unusual activities on the Gnuplot postscript terminal.
Long-Term Security Practices
- Implement secure coding practices to prevent buffer overflow vulnerabilities.
- Regularly update and patch software to mitigate known security risks.
Patching and Updates
- Apply security patches provided by Gnuplot to fix the vulnerability and enhance system security.