VDB-206785 · CVE-2022-36947 · WID-SEC-2022-0883

FastStone Image Viewer up to 7.5 PNG tRNS Chunk Parser stack-based overflow

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.
7.9	$0-$5k	0.00

Summaryinfo

A vulnerability was found in FastStone Image Viewer up to 7.5. It has been classified as critical. The impacted element is an unknown function of the component PNG tRNS Chunk Parser. This manipulation causes stack-based overflow. This vulnerability is registered as CVE-2022-36947. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical was found in FastStone Image Viewer up to 7.5. Affected by this vulnerability is an unknown code block of the component PNG tRNS Chunk Parser. The manipulation with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Unsafe Parsing of a PNG tRNS chunk in FastStone Image Viewer through 7.5 results in a stack buffer overflow.

The weakness was published 08/19/2022 as WID-SEC-2022-0883. The advisory is shared at wid.cert-bund.de. This vulnerability is known as CVE-2022-36947 since 07/27/2022. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/08/2024).

The vulnerability scanner Nessus provides a plugin with the ID 208258 (FastStone Image Viewer <= 7.5 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (208258). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

FastStone

Name

Image Viewer

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.0
VulDB Meta Temp Score: 7.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

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: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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

Nessus ID: 208258
Nessus Name: FastStone Image Viewer <= 7.5 Multiple Vulnerabilities

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/27/2022 🔍
08/19/2022 +23 days 🔍
08/19/2022 +0 days 🔍
04/30/2025 +985 days 🔍

Sourcesinfo

Advisory: WID-SEC-2022-0883
Status: Not defined

CVE: CVE-2022-36947 (🔍)
GCVE (CVE): GCVE-0-2022-36947
GCVE (VulDB): GCVE-100-206785

Entryinfo

Created: 08/19/2022 13:39
Updated: 04/30/2025 03:14
Changes: 08/19/2022 13:39 (39), 09/18/2022 13:04 (11), 10/08/2024 16:31 (16), 04/30/2025 03:14 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.