CVE-2023-36747 : Vulnerability Insights and Analysis

Multiple heap-based buffer overflow vulnerabilities have been discovered in GTKWave 3.3.115, potentially leading to memory corruption when processing specially crafted .fst files. Users would need to open a malicious file to exploit these vulnerabilities. This CVE specifically relates to the handling of 'len' in 'fstWritex' when 'beg_time' does not align with the time table.

Understanding CVE-2023-36747

GTKWave 3.3.115 is affected by multiple heap-based buffer overflow vulnerabilities that can be triggered by a specially crafted .fst file.

What is CVE-2023-36747?

CVE-2023-36747 describes heap-based buffer overflow vulnerabilities present in the fstReaderIterBlocks2 and fstWritex len functionalities of GTKWave 3.3.115.

The Impact of CVE-2023-36747

These vulnerabilities could allow an attacker to corrupt memory and potentially execute arbitrary code on the targeted system by enticing a user to open a malicious .fst file.

Technical Details of CVE-2023-36747

The specific details regarding the vulnerability, affected systems, and exploitation mechanisms are crucial for understanding and addressing CVE-2023-36747.

Vulnerability Description

The vulnerability involves the improper handling of 'len' in 'fstWritex' when there is a mismatch with the 'beg_time' associated with the time table.

Affected Systems and Versions

Vendor: GTKWave
Product: GTKWave
Versions Affected: 3.3.115

Exploitation Mechanism

An attacker can exploit this vulnerability by creating a malicious .fst file and tricking a user into opening it on a system running the affected GTKWave version.

Mitigation and Prevention

Understanding how to mitigate and prevent exploitation of CVE-2023-36747 is essential for maintaining the security of systems.

Immediate Steps to Take

Users are advised to update GTKWave to a non-vulnerable version and avoid opening untrusted .fst files to prevent exploitation of these vulnerabilities.

Long-Term Security Practices

Implementing secure coding practices and regularly updating software are fundamental for reducing the risk of similar vulnerabilities in the future.

Patching and Updates

Vendor patches or updates addressing the heap-based buffer overflow vulnerabilities in GTKWave 3.3.115 should be applied promptly to secure systems against potential exploitation.