CVE-2023-35956

Debian Security Advisory 5653-1

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Multiple heap-based buffer overflow vulnerabilities exist in the fstReaderIterBlocks2 VCDATA parsing functionality of GTKWave 3.3.115. A specially-crafted .fst file can lead to arbitrary code execution. A victim would need to open a malicious file to trigger these vulnerabilities.This vulnerability concerns the decompression function `fastlz_decompress`.

Existen múltiples vulnerabilidades de desbordamiento del búfer en la región Heap de la memoria en la funcionalidad de análisis VCDATA fstReaderIterBlocks2 de GTKWave 3.3.115. Un archivo .fst especialmente manipulado puede provocar la ejecución de código arbitrario. Una víctima necesitaría abrir un archivo malicioso para activar estas vulnerabilidades. Esta vulnerabilidad se refiere a la función de descompresión `fastlz_decompress`.

Claudio Bozzato discovered multiple security issues in gtkwave, a file waveform viewer for VCD (Value Change Dump) files, which may result in the execution of arbitrary code if malformed files are opened.

*Credits: Discovered by Claudio Bozzato of Cisco Talos.

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-06-20 CVE Reserved
2024-01-08 CVE Published
2025-02-13 CVE Updated
2025-02-13 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (2)

URL	Tag	Source
https://lists.debian.org/debian-lts-announce/2024/04/msg00007.html

URL	Date	SRC
https://talosintelligence.com/vulnerability_reports/TALOS-2023-1785	2025-02-13

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Tonybybell Search vendor "Tonybybell"		Gtkwave Search vendor "Tonybybell" for product "Gtkwave"				3.3.115 Search vendor "Tonybybell" for product "Gtkwave" and version "3.3.115"		-		Affected