Overview
The Common Vulnerabilities and Exposures (CVE) system has recently documented a critical security vulnerability, identified as CVE-2023-39316, affecting the GTKWave software version 3.3.115. This vulnerability is related to multiple integer overflow issues existing in the LXT2 num_dict_entries functionality of the software. GTKWave is a fully featured GTK+ based wave viewer that has a wide user base, including system developers and administrators.
The vulnerability is of significant importance due to its potential to allow an attacker to execute arbitrary code, which could compromise the entire system or lead to data leakage. The successful exploitation of this vulnerability requires a user to open a malicious .lxt2 file that triggers these vulnerabilities.
Vulnerability Summary
CVE ID: CVE-2023-39316
Severity: High (7.8)
Attack Vector: Local File
Privileges Required: User level
User Interaction: Required
Impact: Potential system compromise, data leakage, and arbitrary code execution
Affected Products
Share secrets securely
Ameeba is private infrastructure for communication and sensitive work built on encrypted identity instead of exposed corporate identity systems.
Passwords, credentials, confidential files, screenshots, internal discussions, sensitive AI context, and private coordination should not become exposed across ordinary communication platforms.
- • Encrypted identity
- • Private Spaces for organizations and teams
- • End-to-end encrypted chat, calls, files, and notes
- • Sensitive AI work and protected collaboration
- • Built for information that cannot leak
Our mission is to secure human work alongside AI.
Product | Affected Versions
GTKWave | 3.3.115
How the Exploit Works
The vulnerability stems from an integer overflow in the allocation of the `string_pointers` array within the LXT2 num_dict_entries functionality of GTKWave. An attacker can craft a malicious .lxt2 file with specific properties that, when opened by the GTKWave software, causes an integer overflow. This overflow can then lead to arbitrary code execution, as insufficient bounds checking allows the attacker to write and execute malicious code in memory locations that should be inaccessible.
Conceptual Example Code
The following pseudocode conceptually illustrates the exploitation of this vulnerability:
#include <stdio.h>
#include <stdlib.h>
int main() {
// Create a malicious .lxt2 file
FILE *file;
file = fopen("malicious.lxt2", "w");
// Write malicious data that triggers integer overflow in the string_pointers array
for (int i=0; i<MAX_INT; i++) {
fwrite("\x00\x00\x00\x00", 4, 1, file);
}
// Close the file
fclose(file);
return 0;
}Mitigation
Users of GTKWave 3.3.115 are encouraged to apply the vendor-supplied patch as soon as it is available. In the meantime, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help detect and prevent the successful exploitation of this vulnerability. Regularly updating all software and maintaining a robust cyber hygiene practice can also minimize the risk of similar vulnerabilities.