CVE-2023-35703 : Security Advisory and Response

A detailed overview of the multiple stack-based buffer overflow vulnerabilities in GTKWave 3.3.115, their impact, technical details, and mitigation strategies.

Understanding CVE-2023-35703

This article delves into the vulnerabilities present in the FST LEB128 varint functionality of GTKWave 3.3.115 and their potential risks.

What is CVE-2023-35703?

CVE-2023-35703 refers to multiple stack-based buffer overflow vulnerabilities in GTKWave 3.3.115. These vulnerabilities can be exploited by a specially crafted .fst file to trigger arbitrary code execution.

The Impact of CVE-2023-35703

The vulnerabilities in GTKWave 3.3.115 can have a high impact, allowing an attacker to execute arbitrary code on a victim's system by enticing them to open a malicious file.

Technical Details of CVE-2023-35703

This section provides a breakdown of the vulnerability description, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerabilities are found in the FST LEB128 varint functionality of GTKWave 3.3.115. Specifically, the fstReaderVarint64 function is affected, allowing for stack-based buffer overflow attacks.

Affected Systems and Versions

GTKWave version 3.3.115 is affected by these vulnerabilities. Users with this version are at risk of exploitation through malicious .fst files.

Exploitation Mechanism

An attacker can exploit these vulnerabilities by crafting a malicious .fst file that, when opened by a victim, triggers a stack-based buffer overflow, leading to potential arbitrary code execution.

Mitigation and Prevention

Here, we discuss immediate steps to take and long-term security practices to mitigate the risks posed by CVE-2023-35703.

Immediate Steps to Take

Users of GTKWave 3.3.115 should exercise caution when opening .fst files from untrusted sources. Implementing file validation mechanisms can help prevent arbitrary code execution.

Long-Term Security Practices

Regular security updates and patches from GTKWave are crucial. Additionally, maintaining awareness of the latest threats and adhering to safe file handling practices can enhance overall system security.

Patching and Updates

Stay informed about security updates released by GTKWave, ensuring prompt installation of patches to address the identified vulnerabilities.