VDB-249902 · CVE-2023-35956 · TALOS-2023-1785

GTKWave 3.3.115 VCDATA Parser fstReaderIterBlocks2 memory corruption

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in GTKWave 3.3.115. This issue affects the function fstReaderIterBlocks2 of the component VCDATA Parser. Such manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2023-35956. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in GTKWave 3.3.115. It has been rated as critical. Affected by this issue is the function fstReaderIterBlocks2 of the component VCDATA Parser. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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`.

The weakness was disclosed 01/08/2024 as TALOS-2023-1785. The advisory is available at talosintelligence.com. This vulnerability is handled as CVE-2023-35956 since 06/20/2023. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit.

Upgrading eliminates this vulnerability.

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Productinfo

Type

Operating System Utility Software

Name

GTKWave

Version

3.3.115

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 7.8
CNA Vector (Talos): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

06/20/2023 🔍
01/08/2024 +202 days 🔍
01/08/2024 +0 days 🔍
01/08/2024 +0 days 🔍

Sourcesinfo

Advisory: TALOS-2023-1785
Status: Confirmed

CVE: CVE-2023-35956 (🔍)
GCVE (CVE): GCVE-0-2023-35956
GCVE (VulDB): GCVE-100-249902

Entryinfo

Created: 01/08/2024 17:04
Changes: 01/08/2024 17:04 (50)
Complete: 🔍
Cache ID: 216::103