Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2023-35703
CVE-2023-35703:
NixOS vulnerability analysis and mitigation
Overview
Multiple stack-based buffer overflow vulnerabilities exist in the FST LEB128 varint functionality of GTKWave 3.3.115. The vulnerability, identified as CVE-2023-35703, specifically concerns the fstReaderVarint64 function. A specially crafted .fst file can lead to arbitrary code execution when opened by a victim (Talos).
Technical details
The vulnerability exists in the fstReaderVarint64 function where a 16-byte buffer is allocated on the stack, and a do-while loop reads each byte from the input file and stores it in the buffer. The loop's stop condition is controlled by the MSB of the byte read from the file, making it possible for an attacker to write beyond the buffer bounds. The vulnerability has a CVSS v3.1 Base Score of 7.8 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (Talos, NVD).
Impact
If successfully exploited, this vulnerability can lead to arbitrary code execution on the target system. The attack requires user interaction, specifically opening a malicious .fst file (Talos).
Mitigation and workarounds
The vulnerability has been fixed in GTKWave version 3.3.118. Users are recommended to upgrade to this version or later (Debian LTS).
Additional resources
Source: This report was generated using AI
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